United States · Multi-region weather view
Sonoma & Mendocino
Sign in to followNorth Coast valleys from Sonoma through Mendocino and Anderson Valley.
Fog and Pacific air cool the western valleys, while vineyards farther inland receive more heat.
Climate comparisons use the 1991–2020 combined regional record · updated through Sep 13, 2026.
Current conditions
Observations through Oct 30, 2026 · 09:20 UTC
Temperature8.0°C
Dew Point6.1°C
Relative Humidity88%
24h Rainfall0.0 mmmodeled IFS total through Oct 29
NWS station average · 2 stations
Temperature, dew point, humidity, and wind are averaged using the same locations and weights as the historical record. The current temperature uses 100% of the configured regional weight.
- BNVC1 — BOONVILLE · 50% regional weight
- KSTS — Santa Rosa, Santa Rosa Sonoma County Airport · 50% regional weight
NOAA National Weather Service observations. Station readings are point measurements and may not represent every vineyard elevation or exposure.
Vintage explorer
Compare this vintage · View 1991 across regions →
Mean temperature16.5°C
Temperature anomaly-1.3°Cvs 1991-2020
Growing degree days1393base 10°C
Hot days6≥ 32°C
What stood out in 1991
Cool weather can slow ripening and help grapes retain acidity.
Cooler growing season · High confidence
Mean growing-season temperature was -1.3°C versus the 1991–2020 baseline.
Cool weather can slow ripening and help grapes retain acidity.
How unusual was 1991?
The ranking compares vintages that meet the data-coverage threshold and use the same source, regional rules, and 1991-2020 baseline.
Growing-season temperature
7th coolest of 35 vintages Cooler than 28 of 34 other vintages 16.5°CGrowing-season rainfall
12th driest of 35 vintages Drier than 23 of 34 other vintages 133.0 mmHeat accumulation
6th lowest of 35 vintages Lower than 29 of 34 other vintages 1393 GDDHot days
6th fewest of 35 vintages Fewer than 26 of 34 other vintages 6 days1991 month by month
Compared with 1991–2020
Follow heat accumulation, rainfall, frost exposure, and the region’s growing and harvest windows in calendar order.
Frost watch
Growing season
Harvest window
-
1–31 Frost watchHeat accumulation
1991 0 GDDTypical 70 GDDRainfall
1991 347.7 mmTypical 128.0 mm- 1991 freezing days
- 0
- Typical
- 0.3
Heat accumulation ran behind the typical month.
-
1–30 Frost watchGrowing seasonHeat accumulation
1991 80 GDDTypical 106 GDDRainfall
1991 22.5 mmTypical 61.1 mm- 1991 freezing days
- 0
- Typical
- 0.1
Heat accumulation ran behind the typical month.
-
1–31 Frost watchGrowing seasonHeat accumulation
1991 142 GDDTypical 186 GDDRainfall
1991 5.8 mmTypical 34.8 mm- 1991 freezing days
- 0
- Typical
- 0.0
Heat accumulation ran behind the typical month.
-
1–30 Growing seasonHeat accumulation
1991 214 GDDTypical 263 GDDRainfall
1991 14.5 mmTypical 10.5 mmClose to the typical monthly pattern.
-
1–31 Growing seasonHeat accumulation
1991 317 GDDTypical 315 GDDRainfall
1991 0.1 mmTypical 0.6 mmClose to the typical monthly pattern.
-
1–31 Growing seasonHeat accumulation
1991 292 GDDTypical 319 GDDRainfall
1991 2.0 mmTypical 1.7 mmClose to the typical monthly pattern.
-
1–30 Growing seasonHarvest windowHeat accumulation
1991 294 GDDTypical 287 GDDRainfall
1991 0.3 mmTypical 3.7 mmClose to the typical monthly pattern.
-
1–31 Growing seasonHarvest windowHeat accumulation
1991 244 GDDTypical 206 GDDRainfall
1991 66.3 mmTypical 45.4 mmWetter than the typical month.
View milestone calendar data as a table
| Month | 1991 GDD | Typical GDD | 1991 rainfall | Typical rainfall | 1991 freezing days | Typical freezing days |
|---|---|---|---|---|---|---|
| March 1991 | 0 GDD | 70 GDD | 347.7 mm | 128.0 mm | 0 | 0.3 |
| April 1991 | 80 GDD | 106 GDD | 22.5 mm | 61.1 mm | 0 | 0.1 |
| May 1991 | 142 GDD | 186 GDD | 5.8 mm | 34.8 mm | 0 | 0.0 |
| June 1991 | 214 GDD | 263 GDD | 14.5 mm | 10.5 mm | Outside frost window | Outside frost window |
| July 1991 | 317 GDD | 315 GDD | 0.1 mm | 0.6 mm | Outside frost window | Outside frost window |
| August 1991 | 292 GDD | 319 GDD | 2.0 mm | 1.7 mm | Outside frost window | Outside frost window |
| September 1991 | 294 GDD | 287 GDD | 0.3 mm | 3.7 mm | Outside frost window | Outside frost window |
| October 1991 | 244 GDD | 206 GDD | 66.3 mm | 45.4 mm | Outside frost window | Outside frost window |
Calendar data and method
Monthly values are weighted across every configured regional sample using stored Google ARCO ERA5 daily reanalysis. “Typical” is the mean monthly total across 30 baseline seasons. GDD is counted only inside the configured growing window; freezing days are counted only inside the frost-watch window; rainfall covers every displayed calendar day.
Selected-vintage coverage is 100%. Source rows were last retrieved Sep 13, 2026.
Replay the 1991 growing season
214 daily regional observations
Move through the season to follow temperature, rainfall, accumulated heat, and recorded weather events day by day.
Mean temperature
Daily rainfall
Season GDD
Season rainfall
No detected event on this date.
Replay data and method
Daily values are weighted across every configured regional sample using stored Google ARCO ERA5 reanalysis. Coverage is 100%. Source rows were last retrieved Sep 13, 2026.
Closest weather matches
These years had the most similar growing-season and harvest weather.
Closest match
1994
Most alike in Spring frost exposure and Growing-season precipitation.
- Spring frost exposure
- the same: 0 days
- Growing-season precipitation
- more rain: 3.6 mm
Largest difference: Harvest precipitation — less rain
View 1994 →Second closest
2007
Most alike in Spring frost exposure and Growing degree days.
- Spring frost exposure
- the same: 0 days
- Growing degree days
- lower: 40 GDD
Largest difference: Growing-season precipitation — more rain
View 2007 →Third closest
2012
Most alike in Growing degree days and Growing-season mean temperature.
- Growing degree days
- higher: 1 GDD
- Growing-season mean temperature
- cooler: 0.0°C
Largest difference: Spring frost exposure — more frost-exposure days
View 2012 →
How similar years are calculated
Method analog-v1-2026-07 standardizes six weather measures across 34 complete ARCO ERA5 comparison years, then measures the distance between them. The calculation runs when the page is requested.
Measures used: Growing-season mean temperature (20%); Growing degree days (15%); Hot-day count (15%); Growing-season precipitation (20%); Harvest precipitation (20%); Spring frost exposure (10%).
Calculated distances: 1994 0.465; 2007 0.492; 2012 0.693.
View historical chart data as a table
| Year | Temperature anomaly | Rainfall anomaly | Hot days |
|---|---|---|---|
| 1991 | -1.3°C | -25 mm | 6 |
| 1992 | -0.0°C | +36 mm | 6 |
| 1993 | -0.8°C | +75 mm | 10 |
| 1994 | -1.2°C | -21 mm | 3 |
| 1995 | -1.1°C | +54 mm | 14 |
| 1996 | -0.8°C | +81 mm | 15 |
| 1997 | -0.4°C | +45 mm | 7 |
| 1998 | -1.5°C | +91 mm | 17 |
| 1999 | -1.6°C | -33 mm | 11 |
| 2000 | -1.1°C | +92 mm | 9 |
| 2001 | -0.8°C | -55 mm | 16 |
| 2002 | -1.3°C | -102 mm | 18 |
| 2003 | -0.8°C | +90 mm | 21 |
| 2004 | -0.6°C | +5 mm | 12 |
| 2005 | -1.3°C | +132 mm | 6 |
| 2006 | -0.9°C | +69 mm | 14 |
| 2007 | -1.6°C | +40 mm | 4 |
| 2008 | -1.1°C | -93 mm | 17 |
| 2009 | -1.3°C | +41 mm | 11 |
| 2010 | -2.0°C | +297 mm | 9 |
| 2011 | -1.6°C | +94 mm | 6 |
| 2012 | -1.4°C | -8 mm | 5 |
| 2013 | -0.8°C | -33 mm | 11 |
| 2014 | +0.0°C | -29 mm | 15 |
| 2015 | +0.0°C | -65 mm | 15 |
| 2016 | -0.6°C | +113 mm | 8 |
| 2017 | -0.2°C | +13 mm | 20 |
| 2018 | -0.9°C | +29 mm | 2 |
| 2019 | -0.3°C | +30 mm | 13 |
| 2020 | +0.5°C | -52 mm | 18 |
| 2021 | -0.5°C | +103 mm | 14 |
| 2022 | -0.5°C | +27 mm | 11 |
| 2023 | -0.8°C | -52 mm | 10 |
| 2024 | -0.0°C | -59 mm | 23 |
| 2025 | -0.7°C | -37 mm | 3 |
| 2026 | -0.3°C | -30 mm | 15 |
winter
8.6°C
-0.7°C vs baseline
179 mm rain · -360 mm
spring
11.2°C
-2.5°C vs baseline
396 mm rain · +173 mm
summer
18.1°C
-1.7°C vs baseline
18 mm rain · +6 mm
harvest
18.2°C
+0.1°C vs baseline
69 mm rain · +20 mm
Weather events
Periods that crossed one of the published regional thresholds, shown in date order.
Dry spell
- Duration
- 27 days
- Total rain
- 1.1 mm
- Daily cutoff
- 1.0 mm/day
Dry spell
- Duration
- 116 days
- Total rain
- 5.9 mm
- Daily cutoff
- 1.0 mm/day
Heat episode
- Peak temperature
- 34.1°C
- Duration
- 3 days
- Heat accumulation
- 42 GDD
Heat episode
- Peak temperature
- 32.3°C
- Duration
- 2 days
- Heat accumulation
- 26 GDD
Concentrated harvest rain
- Total rain
- 66.9 mm
- Highest 3-day total
- 66.0 mm
- Trigger threshold
- 20.0 mm
A large share of the season's rain fell during the harvest period.
How events are detected
Weather & Vines combined regional series; method event-timeline-v2-2026-07, rules sonoma-county-catalog-v1-2026-07. Source last updated Aug 1, 2026, calculated Sep 21, 2026. Each configured point must have at least 95.0% coverage.
1991–present
Climate change
Measured regional trends are shown separately from model projections. The observed record ends at the latest complete growing season shared by every published region.
Observed record
Historical trends, 1991–2025
Growing degree days changed +52.6 GDD per decade. The 95% interval is +19.4 to +85.7 GDD per decade, based on 35 eligible vintages.
Weighted median: 70% SSP2-4.5 · 15% SSP1-2.6 · 15% SSP3-7.0
Shaded central 80% model range using the same weights.
How it is measured: Across the April 1–October 31 growing season, each day's mean temperature above 10°C adds to the total; cooler days add zero.
Scroll horizontally to inspect the full timeline.
View annual growing degree days data
| Vintage | Growing degree days | Change from 1991–2020 |
|---|---|---|
| 1991 | 1582 GDD | -100 GDD |
| 1992 | 1815 GDD | +133 GDD |
| 1993 | 1703 GDD | +21 GDD |
| 1994 | 1579 GDD | -103 GDD |
| 1995 | 1631 GDD | -51 GDD |
| 1996 | 1711 GDD | +29 GDD |
| 1997 | 1808 GDD | +125 GDD |
| 1998 | 1526 GDD | -156 GDD |
| 1999 | 1554 GDD | -128 GDD |
| 2000 | 1627 GDD | -55 GDD |
| 2001 | 1738 GDD | +56 GDD |
| 2002 | 1614 GDD | -68 GDD |
| 2003 | 1693 GDD | +11 GDD |
| 2004 | 1740 GDD | +58 GDD |
| 2005 | 1551 GDD | -131 GDD |
| 2006 | 1652 GDD | -31 GDD |
| 2007 | 1588 GDD | -94 GDD |
| 2008 | 1673 GDD | -9 GDD |
| 2009 | 1619 GDD | -63 GDD |
| 2010 | 1453 GDD | -230 GDD |
| 2011 | 1527 GDD | -155 GDD |
| 2012 | 1587 GDD | -95 GDD |
| 2013 | 1696 GDD | +14 GDD |
| 2014 | 1856 GDD | +173 GDD |
| 2015 | 1865 GDD | +182 GDD |
| 2016 | 1707 GDD | +25 GDD |
| 2017 | 1867 GDD | +185 GDD |
| 2018 | 1686 GDD | +3 GDD |
| 2019 | 1814 GDD | +132 GDD |
| 2020 | 2006 GDD | +324 GDD |
| 2021 | 1761 GDD | +78 GDD |
| 2022 | 1843 GDD | +161 GDD |
| 2023 | 1702 GDD | +20 GDD |
| 2024 | 1884 GDD | +202 GDD |
| 2025 | 1719 GDD | +37 GDD |
- Growing-season mean temperature
- +0.25 °C per decade 95% interval +0.09 to +0.41
- Growing degree days
- +52.55 GDD per decade 95% interval +19.43 to +85.67
- Growing-season precipitation
- -11.85 mm per decade 95% interval -29.10 to +5.40
- Hot days
- +2.24 days per decade 95% interval +0.48 to +4.00
- Spring frost days
- -0.02 days per decade 95% interval -0.20 to +0.16
- Longest dry spell
- -2.11 days per decade 95% interval -10.15 to +5.93
Last Updated September 13, 2026
Model ensemble
Projected climate through 2075
Temperature changes are relative to each model’s 1991–2020 baseline. The table combines all three pathways, weighted 70% to SSP2-4.5 and 15% each to SSP1-2.6 and SSP3-7.0.
Scroll horizontally to compare all columns.
| Period | Weighted median | Weighted central 80% | Models per pathway |
|---|---|---|---|
| 2021-2040 | +0.9°C | +0.5 to +1.3°C | 25 |
| 2041-2060 | +1.3°C | +1.0 to +2.1°C | 25 |
| 2061-2075 | +1.8°C | +1.4 to +2.7°C | 25 |
How pathways are combined
For each period and percentile, Weather & Vines takes 70% of the SSP2-4.5 value, 15% of the SSP1-2.6 value, and 15% of the SSP3-7.0 value. Each pathway contains the same 25 models. The weights are an editorial view of the current trajectory, not scenario probabilities.
Last Updated June 29, 2025
Typical year · 1991–2020
When to visit
This calendar describes typical regional weather under the selected climate baseline. It is not a forecast for a future trip, and it does not account for crowds, lodging, events, or vineyard access.
Deterministic IFS forecast
Next ten days
Scroll horizontally to see all forecast dates.
| Date | Fri | Sat | Sun | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|---|---|---|
| High | 18°C | 15°C | 16°C | 19°C | 20°C | 16°C | 12°C | 15°C | 17°C | 18°C |
| Low | 5°C | 5°C | 5°C | 5°C | 8°C | 7°C | 8°C | 7°C | 6°C | 7°C |
| Rain | 0.0 mm | 0.7 mm | 1.5 mm | 0.0 mm | 0.0 mm | 0.2 mm | 4.4 mm | 0.0 mm | 0.0 mm | 0.0 mm |
Across the typical year: Early August has the warmest median afternoon high (28.6°C); Late December has the coolest (13.4°C). Wet days are most frequent in Early December (46%) and least frequent in Early August (0%). Ties are resolved by calendar order.
Afternoon highOvernight lowMiddle 50%
Scroll horizontally to inspect all 24 half-month periods.
Scroll horizontally to inspect all 24 half-month periods.
View all 24 periods as a table
Scroll horizontally to view all columns.
| Period | Afternoon high, median (middle 50%) | Overnight low, median (middle 50%) | Wet-day frequency | Period rain, median (middle 50%) |
|---|---|---|---|---|
| Jan 1–15 | 13.6°C (11.9–15.6°C) | 3.3°C (0.5–5.9°C) | 42% | 62.5 mm (13.6–114.7 mm) |
| Jan 16–31 | 14.5°C (13.0–16.9°C) | 3.7°C (1.3–6.4°C) | 43% | 70.4 mm (17.9–150.4 mm) |
| Feb 1–15 | 16.0°C (14.1–18.9°C) | 4.2°C (1.8–7.0°C) | 38% | 60.6 mm (20.8–136.1 mm) |
| Feb 16–29 | 15.3°C (13.1–19.0°C) | 4.6°C (2.4–6.6°C) | 44% | 81.5 mm (29.6–143.9 mm) |
| Mar 1–15 | 17.5°C (14.7–20.6°C) | 5.1°C (2.8–7.1°C) | 38% | 60.2 mm (16.5–85.7 mm) |
| Mar 16–31 | 18.2°C (15.7–21.8°C) | 5.8°C (3.8–7.6°C) | 37% | 34.0 mm (16.3–83.1 mm) |
| Apr 1–15 | 18.9°C (16.6–21.8°C) | 5.7°C (3.9–7.7°C) | 29% | 31.8 mm (13.9–55.8 mm) |
| Apr 16–30 | 21.0°C (18.5–24.8°C) | 7.0°C (5.3–8.7°C) | 22% | 15.9 mm (7.4–31.5 mm) |
| May 1–15 | 22.6°C (19.9–25.6°C) | 8.0°C (6.4–9.3°C) | 13% | 5.7 mm (1.1–22.4 mm) |
| May 16–31 | 23.5°C (21.1–26.7°C) | 8.9°C (7.6–10.2°C) | 14% | 2.3 mm (0.6–27.0 mm) |
| Jun 1–15 | 26.1°C (23.3–29.0°C) | 9.9°C (8.7–11.4°C) | 6% | 1.3 mm (0.1–5.5 mm) |
| Jun 16–30 | 27.9°C (25.4–30.5°C) | 10.7°C (9.2–12.1°C) | 4% | 0.1 mm (0.0–3.6 mm) |
| Jul 1–15 | 28.6°C (26.5–30.8°C) | 11.2°C (10.1–12.1°C) | 1% | 0.0 mm (0.0–0.2 mm) |
| Jul 16–31 | 28.4°C (26.3–30.8°C) | 11.7°C (10.7–12.6°C) | 0% | 0.1 mm (0.0–0.4 mm) |
| Aug 1–15 | 28.6°C (26.4–31.2°C) | 11.4°C (10.3–12.5°C) | 0% | 0.1 mm (0.0–0.3 mm) |
| Aug 16–31 | 28.6°C (26.5–31.4°C) | 11.5°C (10.3–12.6°C) | 1% | 0.1 mm (0.0–0.5 mm) |
| Sep 1–15 | 28.3°C (25.9–31.6°C) | 10.9°C (9.6–12.2°C) | 2% | 0.1 mm (0.0–0.5 mm) |
| Sep 16–30 | 27.7°C (25.2–31.2°C) | 10.2°C (8.8–11.4°C) | 4% | 0.8 mm (0.1–2.9 mm) |
| Oct 1–15 | 26.1°C (22.9–29.3°C) | 9.0°C (7.2–10.5°C) | 10% | 1.7 mm (0.2–23.9 mm) |
| Oct 16–31 | 23.5°C (20.4–26.8°C) | 7.9°C (6.1–9.7°C) | 16% | 12.5 mm (1.1–37.7 mm) |
| Nov 1–15 | 20.0°C (17.3–23.1°C) | 6.1°C (3.9–8.4°C) | 26% | 19.4 mm (8.7–66.4 mm) |
| Nov 16–30 | 16.8°C (15.0–18.9°C) | 4.4°C (2.2–7.0°C) | 35% | 42.7 mm (19.2–82.7 mm) |
| Dec 1–15 | 14.5°C (13.1–16.3°C) | 3.2°C (1.0–7.3°C) | 46% | 90.7 mm (31.8–140.6 mm) |
| Dec 16–31 | 13.4°C (11.8–15.5°C) | 2.3°C (0.1–4.9°C) | 39% | 69.0 mm (13.7–146.1 mm) |
Each year contributes to temperature or rain separately when at least 90% of that period’s days are present. A value is shown only when at least 80% of the baseline years qualify. February 29 is included in late February.
Historical climatology Last Updated September 13, 2026
Season to date
Growing season heat and rainfall
Apr 1–Oct 29, 2026
Growing degree days1783.2base 10°C
Growing-season rainfall121.9 mmweighted regional total
2026 season1991–2020 average
2026 season1991–2020 average
View growing-season accumulation data
| Date | Season GDD | 1991–2020 average GDD | Season rainfall | 1991–2020 average rainfall |
|---|---|---|---|---|
| 2026-04-01 | 3.0 | 3.1 | 4.1 mm | 3.5 mm |
| 2026-04-02 | 4.9 | 6.1 | 4.1 mm | 5.0 mm |
| 2026-04-03 | 9.7 | 8.8 | 4.1 mm | 6.7 mm |
| 2026-04-04 | 15.6 | 11.3 | 4.1 mm | 9.6 mm |
| 2026-04-05 | 22.5 | 13.5 | 4.1 mm | 12.0 mm |
| 2026-04-06 | 27.6 | 16.1 | 4.1 mm | 15.6 mm |
| 2026-04-07 | 32.4 | 18.8 | 4.1 mm | 20.5 mm |
| 2026-04-08 | 39.7 | 21.1 | 4.3 mm | 23.2 mm |
| 2026-04-09 | 45.4 | 23.6 | 4.6 mm | 24.9 mm |
| 2026-04-10 | 49.3 | 26.5 | 19.4 mm | 26.2 mm |
| 2026-04-11 | 50.0 | 29.4 | 40.7 mm | 30.6 mm |
| 2026-04-12 | 50.9 | 32.4 | 54.2 mm | 35.8 mm |
| 2026-04-13 | 52.8 | 35.5 | 54.2 mm | 38.7 mm |
| 2026-04-14 | 55.3 | 38.4 | 54.2 mm | 39.5 mm |
| 2026-04-15 | 58.2 | 40.9 | 54.2 mm | 40.2 mm |
| 2026-04-16 | 61.7 | 43.9 | 54.2 mm | 42.8 mm |
| 2026-04-17 | 66.1 | 47.4 | 54.2 mm | 45.4 mm |
| 2026-04-18 | 70.2 | 50.9 | 54.2 mm | 46.6 mm |
| 2026-04-19 | 74.7 | 54.5 | 54.3 mm | 47.9 mm |
| 2026-04-20 | 76.2 | 58.7 | 77.0 mm | 49.9 mm |
| 2026-04-21 | 78.0 | 62.8 | 92.3 mm | 50.9 mm |
| 2026-04-22 | 80.4 | 67.3 | 99.7 mm | 52.2 mm |
| 2026-04-23 | 84.2 | 71.9 | 99.7 mm | 53.5 mm |
| 2026-04-24 | 88.9 | 76.4 | 99.8 mm | 55.4 mm |
| 2026-04-25 | 91.1 | 80.8 | 99.8 mm | 57.3 mm |
| 2026-04-26 | 93.4 | 85.4 | 100.1 mm | 57.8 mm |
| 2026-04-27 | 96.4 | 90.3 | 101.7 mm | 58.7 mm |
| 2026-04-28 | 101.0 | 95.3 | 101.9 mm | 59.7 mm |
| 2026-04-29 | 107.0 | 100.5 | 101.9 mm | 60.8 mm |
| 2026-04-30 | 114.1 | 106.0 | 101.9 mm | 61.1 mm |
| 2026-05-01 | 121.4 | 111.8 | 101.9 mm | 62.7 mm |
| 2026-05-02 | 126.1 | 117.5 | 101.9 mm | 64.1 mm |
| 2026-05-03 | 129.7 | 123.0 | 102.0 mm | 65.5 mm |
| 2026-05-04 | 132.0 | 128.1 | 108.7 mm | 66.5 mm |
| 2026-05-05 | 136.1 | 133.1 | 109.1 mm | 68.3 mm |
| 2026-05-06 | 142.6 | 138.2 | 109.1 mm | 68.7 mm |
| 2026-05-07 | 148.7 | 143.8 | 109.2 mm | 69.8 mm |
| 2026-05-08 | 156.4 | 149.6 | 109.2 mm | 71.0 mm |
| 2026-05-09 | 165.1 | 154.9 | 109.2 mm | 71.7 mm |
| 2026-05-10 | 174.4 | 160.3 | 109.2 mm | 72.1 mm |
| 2026-05-11 | 184.1 | 165.6 | 109.2 mm | 72.4 mm |
| 2026-05-12 | 191.7 | 171.0 | 109.2 mm | 73.3 mm |
| 2026-05-13 | 199.7 | 176.3 | 109.2 mm | 73.9 mm |
| 2026-05-14 | 208.4 | 181.9 | 109.2 mm | 74.8 mm |
| 2026-05-15 | 217.7 | 188.1 | 109.2 mm | 77.1 mm |
| 2026-05-16 | 225.1 | 194.1 | 109.2 mm | 79.4 mm |
| 2026-05-17 | 231.6 | 200.3 | 109.2 mm | 81.2 mm |
| 2026-05-18 | 242.1 | 206.4 | 109.2 mm | 84.4 mm |
| 2026-05-19 | 251.4 | 212.2 | 109.2 mm | 86.2 mm |
| 2026-05-20 | 262.0 | 218.1 | 109.2 mm | 86.9 mm |
| 2026-05-21 | 273.0 | 224.2 | 109.2 mm | 88.0 mm |
| 2026-05-22 | 280.2 | 230.6 | 109.2 mm | 88.4 mm |
| 2026-05-23 | 286.3 | 237.4 | 109.3 mm | 89.0 mm |
| 2026-05-24 | 292.2 | 244.1 | 109.3 mm | 89.3 mm |
| 2026-05-25 | 296.1 | 250.6 | 109.3 mm | 90.3 mm |
| 2026-05-26 | 300.7 | 256.9 | 109.4 mm | 91.2 mm |
| 2026-05-27 | 305.0 | 263.2 | 109.8 mm | 92.5 mm |
| 2026-05-28 | 310.9 | 269.8 | 111.4 mm | 93.6 mm |
| 2026-05-29 | 317.0 | 276.8 | 111.4 mm | 94.9 mm |
| 2026-05-30 | 324.1 | 283.9 | 111.4 mm | 95.4 mm |
| 2026-05-31 | 333.0 | 291.7 | 111.4 mm | 95.8 mm |
| 2026-06-01 | 342.9 | 299.8 | 111.4 mm | 96.1 mm |
| 2026-06-02 | 352.0 | 307.8 | 111.4 mm | 96.2 mm |
| 2026-06-03 | 363.2 | 315.7 | 111.4 mm | 96.6 mm |
| 2026-06-04 | 374.4 | 323.4 | 111.4 mm | 98.1 mm |
| 2026-06-05 | 387.2 | 330.9 | 111.4 mm | 98.7 mm |
| 2026-06-06 | 395.8 | 338.1 | 111.4 mm | 99.1 mm |
| 2026-06-07 | 404.2 | 345.5 | 111.4 mm | 99.1 mm |
| 2026-06-08 | 412.1 | 353.4 | 111.8 mm | 100.1 mm |
| 2026-06-09 | 421.7 | 361.9 | 111.9 mm | 100.5 mm |
| 2026-06-10 | 435.5 | 370.3 | 111.9 mm | 100.7 mm |
| 2026-06-11 | 453.0 | 378.7 | 111.9 mm | 100.8 mm |
| 2026-06-12 | 466.3 | 387.2 | 111.9 mm | 100.9 mm |
| 2026-06-13 | 477.4 | 395.9 | 111.9 mm | 100.9 mm |
| 2026-06-14 | 486.5 | 405.1 | 111.9 mm | 101.0 mm |
| 2026-06-15 | 495.9 | 413.8 | 111.9 mm | 101.4 mm |
| 2026-06-16 | 504.6 | 422.5 | 111.9 mm | 101.8 mm |
| 2026-06-17 | 513.0 | 431.5 | 111.9 mm | 102.0 mm |
| 2026-06-18 | 519.8 | 440.8 | 112.0 mm | 102.1 mm |
| 2026-06-19 | 526.7 | 450.0 | 112.3 mm | 102.1 mm |
| 2026-06-20 | 534.8 | 459.4 | 112.3 mm | 102.1 mm |
| 2026-06-21 | 543.6 | 468.8 | 112.3 mm | 102.1 mm |
| 2026-06-22 | 552.4 | 478.3 | 112.4 mm | 102.2 mm |
| 2026-06-23 | 561.1 | 487.5 | 112.4 mm | 102.2 mm |
| 2026-06-24 | 569.4 | 496.7 | 112.4 mm | 102.3 mm |
| 2026-06-25 | 578.9 | 506.3 | 112.4 mm | 103.1 mm |
| 2026-06-26 | 587.8 | 515.8 | 112.5 mm | 103.6 mm |
| 2026-06-27 | 596.4 | 525.4 | 112.5 mm | 104.0 mm |
| 2026-06-28 | 605.8 | 535.2 | 112.5 mm | 105.1 mm |
| 2026-06-29 | 616.1 | 544.9 | 112.5 mm | 105.9 mm |
| 2026-06-30 | 626.8 | 555.0 | 112.5 mm | 106.3 mm |
| 2026-07-01 | 636.6 | 565.3 | 112.5 mm | 106.3 mm |
| 2026-07-02 | 645.9 | 575.3 | 112.5 mm | 106.3 mm |
| 2026-07-03 | 655.2 | 585.3 | 112.5 mm | 106.3 mm |
| 2026-07-04 | 664.6 | 595.4 | 112.5 mm | 106.3 mm |
| 2026-07-05 | 673.0 | 605.2 | 112.5 mm | 106.3 mm |
| 2026-07-06 | 680.8 | 614.9 | 112.5 mm | 106.3 mm |
| 2026-07-07 | 688.9 | 624.8 | 112.6 mm | 106.3 mm |
| 2026-07-08 | 698.2 | 634.9 | 112.6 mm | 106.4 mm |
| 2026-07-09 | 709.7 | 645.1 | 112.6 mm | 106.4 mm |
| 2026-07-10 | 720.5 | 655.0 | 112.6 mm | 106.4 mm |
| 2026-07-11 | 731.7 | 664.9 | 112.6 mm | 106.5 mm |
| 2026-07-12 | 744.9 | 675.0 | 112.6 mm | 106.5 mm |
| 2026-07-13 | 759.1 | 685.3 | 112.7 mm | 106.5 mm |
| 2026-07-14 | 774.8 | 695.8 | 112.7 mm | 106.5 mm |
| 2026-07-15 | 791.1 | 706.1 | 112.7 mm | 106.5 mm |
| 2026-07-16 | 803.7 | 716.3 | 112.7 mm | 106.5 mm |
| 2026-07-17 | 814.1 | 726.1 | 112.7 mm | 106.6 mm |
| 2026-07-18 | 823.7 | 736.3 | 112.7 mm | 106.7 mm |
| 2026-07-19 | 833.5 | 746.4 | 112.8 mm | 106.7 mm |
| 2026-07-20 | 843.7 | 756.6 | 112.9 mm | 106.7 mm |
| 2026-07-21 | 858.7 | 766.8 | 112.9 mm | 106.7 mm |
| 2026-07-22 | 868.4 | 777.1 | 113.4 mm | 106.7 mm |
| 2026-07-23 | 879.4 | 787.7 | 113.4 mm | 106.7 mm |
| 2026-07-24 | 891.3 | 798.2 | 113.4 mm | 106.8 mm |
| 2026-07-25 | 903.3 | 808.5 | 113.4 mm | 106.8 mm |
| 2026-07-26 | 915.5 | 819.0 | 113.4 mm | 106.8 mm |
| 2026-07-27 | 927.4 | 829.4 | 113.4 mm | 106.9 mm |
| 2026-07-28 | 940.2 | 839.6 | 113.4 mm | 106.9 mm |
| 2026-07-29 | 953.8 | 849.5 | 113.4 mm | 106.9 mm |
| 2026-07-30 | 966.6 | 859.6 | 113.4 mm | 106.9 mm |
| 2026-07-31 | 979.9 | 869.8 | 113.4 mm | 106.9 mm |
| 2026-08-01 | 995.0 | 880.2 | 113.4 mm | 106.9 mm |
| 2026-08-02 | 1010.2 | 890.5 | 113.4 mm | 106.9 mm |
| 2026-08-03 | 1025.3 | 900.8 | 113.4 mm | 106.9 mm |
| 2026-08-04 | 1037.5 | 910.8 | 113.4 mm | 107.0 mm |
| 2026-08-05 | 1048.3 | 920.4 | 113.5 mm | 107.0 mm |
| 2026-08-06 | 1059.1 | 930.2 | 113.5 mm | 107.0 mm |
| 2026-08-07 | 1071.3 | 940.0 | 113.5 mm | 107.1 mm |
| 2026-08-08 | 1084.4 | 950.1 | 113.5 mm | 107.1 mm |
| 2026-08-09 | 1098.5 | 960.6 | 113.5 mm | 107.1 mm |
| 2026-08-10 | 1109.6 | 971.2 | 113.5 mm | 107.1 mm |
| 2026-08-11 | 1119.2 | 981.6 | 113.5 mm | 107.1 mm |
| 2026-08-12 | 1128.7 | 992.2 | 113.5 mm | 107.1 mm |
| 2026-08-13 | 1136.5 | 1003.0 | 113.7 mm | 107.2 mm |
| 2026-08-14 | 1144.7 | 1013.7 | 113.8 mm | 107.2 mm |
| 2026-08-15 | 1153.4 | 1024.3 | 113.9 mm | 107.2 mm |
| 2026-08-16 | 1163.1 | 1035.1 | 113.9 mm | 107.2 mm |
| 2026-08-17 | 1173.7 | 1045.6 | 113.9 mm | 107.3 mm |
| 2026-08-18 | 1185.2 | 1055.8 | 113.9 mm | 107.4 mm |
| 2026-08-19 | 1196.8 | 1065.5 | 113.9 mm | 107.4 mm |
| 2026-08-20 | 1206.5 | 1075.2 | 113.9 mm | 108.3 mm |
| 2026-08-21 | 1216.7 | 1085.0 | 114.0 mm | 108.4 mm |
| 2026-08-22 | 1227.7 | 1095.3 | 114.0 mm | 108.4 mm |
| 2026-08-23 | 1240.2 | 1105.6 | 114.0 mm | 108.4 mm |
| 2026-08-24 | 1250.8 | 1115.9 | 114.0 mm | 108.4 mm |
| 2026-08-25 | 1261.2 | 1126.0 | 114.0 mm | 108.4 mm |
| 2026-08-26 | 1273.4 | 1136.1 | 114.0 mm | 108.5 mm |
| 2026-08-27 | 1287.5 | 1146.6 | 114.0 mm | 108.5 mm |
| 2026-08-28 | 1296.8 | 1157.5 | 114.0 mm | 108.5 mm |
| 2026-08-29 | 1306.7 | 1168.4 | 114.0 mm | 108.5 mm |
| 2026-08-30 | 1316.6 | 1178.6 | 114.0 mm | 108.5 mm |
| 2026-08-31 | 1323.7 | 1188.9 | 114.1 mm | 108.6 mm |
| 2026-09-01 | 1330.8 | 1199.5 | 114.5 mm | 108.7 mm |
| 2026-09-02 | 1338.3 | 1210.3 | 116.2 mm | 108.8 mm |
| 2026-09-03 | 1344.4 | 1220.7 | 121.3 mm | 108.8 mm |
| 2026-09-04 | 1351.1 | 1230.8 | 121.3 mm | 108.9 mm |
| 2026-09-05 | 1358.8 | 1241.0 | 121.3 mm | 108.9 mm |
| 2026-09-06 | 1367.0 | 1251.5 | 121.3 mm | 108.9 mm |
| 2026-09-07 | 1376.4 | 1262.0 | 121.3 mm | 108.9 mm |
| 2026-09-08 | 1387.8 | 1272.2 | 121.3 mm | 108.9 mm |
| 2026-09-09 | 1401.6 | 1281.6 | 121.4 mm | 109.0 mm |
| 2026-09-10 | 1418.3 | 1290.9 | 121.4 mm | 109.0 mm |
| 2026-09-11 | 1430.0 | 1300.9 | 121.4 mm | 109.0 mm |
| 2026-09-12 | 1439.8 | 1310.9 | 121.4 mm | 109.1 mm |
| 2026-09-13 | 1448.6 | 1320.4 | 121.4 mm | 109.2 mm |
| 2026-09-14 | 1458.2 | 1329.4 | 121.4 mm | 109.5 mm |
| 2026-09-15 | 1467.8 | 1337.7 | 121.4 mm | 109.8 mm |
| 2026-09-16 | 1474.9 | 1346.1 | 121.4 mm | 110.0 mm |
| 2026-09-17 | 1482.8 | 1355.0 | 121.6 mm | 110.1 mm |
| 2026-09-18 | 1492.2 | 1364.3 | 121.7 mm | 110.4 mm |
| 2026-09-19 | 1502.1 | 1373.8 | 121.7 mm | 110.6 mm |
| 2026-09-20 | 1510.6 | 1383.5 | 121.7 mm | 110.7 mm |
| 2026-09-21 | 1518.5 | 1393.1 | 121.7 mm | 111.2 mm |
| 2026-09-22 | 1526.7 | 1401.9 | 121.8 mm | 111.3 mm |
| 2026-09-23 | 1536.8 | 1411.0 | 121.8 mm | 111.3 mm |
| 2026-09-24 | 1548.1 | 1420.6 | 121.8 mm | 111.4 mm |
| 2026-09-25 | 1558.4 | 1430.3 | 121.8 mm | 111.7 mm |
| 2026-09-26 | 1565.5 | 1440.0 | 121.8 mm | 111.8 mm |
| 2026-09-27 | 1573.3 | 1449.6 | 121.8 mm | 111.9 mm |
| 2026-09-28 | 1581.0 | 1458.9 | 121.8 mm | 112.1 mm |
| 2026-09-29 | 1592.6 | 1467.4 | 121.8 mm | 112.1 mm |
| 2026-09-30 | 1604.1 | 1475.8 | 121.8 mm | 112.3 mm |
| 2026-10-01 | 1614.0 | 1484.2 | 121.8 mm | 112.7 mm |
| 2026-10-02 | 1624.8 | 1492.4 | 121.8 mm | 113.9 mm |
| 2026-10-03 | 1638.6 | 1500.1 | 121.8 mm | 114.8 mm |
| 2026-10-04 | 1651.4 | 1507.2 | 121.8 mm | 116.1 mm |
| 2026-10-05 | 1665.6 | 1514.1 | 121.8 mm | 117.8 mm |
| 2026-10-06 | 1680.0 | 1521.6 | 121.8 mm | 118.1 mm |
| 2026-10-07 | 1693.7 | 1529.5 | 121.8 mm | 118.1 mm |
| 2026-10-08 | 1705.9 | 1537.5 | 121.8 mm | 118.7 mm |
| 2026-10-09 | 1716.7 | 1545.2 | 121.8 mm | 119.7 mm |
| 2026-10-10 | 1723.4 | 1552.4 | 121.8 mm | 120.8 mm |
| 2026-10-11 | 1728.5 | 1559.2 | 121.9 mm | 120.9 mm |
| 2026-10-12 | 1732.1 | 1566.2 | 121.9 mm | 121.6 mm |
| 2026-10-13 | 1737.0 | 1573.7 | 121.9 mm | 123.9 mm |
| 2026-10-14 | 1743.6 | 1581.8 | 121.9 mm | 125.3 mm |
| 2026-10-15 | 1752.2 | 1589.4 | 121.9 mm | 126.8 mm |
| 2026-10-16 | 1762.2 | 1596.6 | 121.9 mm | 127.6 mm |
| 2026-10-17 | 1772.3 | 1603.4 | 121.9 mm | 128.5 mm |
| 2026-10-18 | 1779.0 | 1609.8 | 121.9 mm | 128.9 mm |
| 2026-10-19 | 1783.2 | 1616.0 | 121.9 mm | 131.2 mm |
Forecast outlook
ECMWF IFS 0.25° via Herbie · run Oct 30, 2026 at 00:00 UTC
10-day totals compared with the 1991–2020 combined regional record
- GDD accumulation
- 12 GDDvs 40 GDD average
- Total rainfall
- 6.8 mmvs 23.5 mm average
No unusually hot or wet period stands out in the short-range forecast.
Fri10/30
18°Cavg 21°C
5°Cavg 7°C
+1 GDD
0.0 mm
Sat10/31
15°Cavg 21°C
5°Cavg 7°C
+0 GDD
0.7 mm
Sun11/1
16°Cavg 22°C
5°Cavg 7°C
+0 GDD
1.5 mm
Mon11/2
19°Cavg 22°C
5°Cavg 6°C
+1 GDD
0.0 mm
Tue11/3
20°Cavg 22°C
8°Cavg 6°C
+3 GDD
0.0 mm
Wed11/4
16°Cavg 21°C
7°Cavg 6°C
+1 GDD
0.2 mm
Thu11/5
12°Cavg 21°C
8°Cavg 6°C
+0 GDD
4.4 mm
Fri11/6
15°Cavg 21°C
7°Cavg 7°C
+1 GDD
0.0 mm
Sat11/7
17°Cavg 21°C
6°Cavg 7°C
+2 GDD
0.0 mm
Sun11/8
18°Cavg 20°C
7°Cavg 6°C
+4 GDD
0.0 mm
Data and methods
Show data sources and model assumptions
Current temperature, dew point, humidity, and wind use geographically weighted NWS station observations. The 24-hour rain total and 10-day outlook use the 00 UTC deterministic ECMWF IFS 0.25° public forecast retrieved directly with Herbie. Historical temperature and rain combine qualifying GHCN-D stations with ERA5 by geographic area; a missing station day uses the nearest ERA5 value for that station's area. Climate comparisons use 1991–2020.
Forecast comparisons use the 1991–2020 combined regional daily record. Daily high and low averages use the matching date; rainfall and GDD sum the same calendar dates as the forecast period.
This service is based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF). Weather & Vines subsets, converts, and regionally weights the forecast fields. ECMWF data are published under CC BY 4.0. ECMWF accepts no liability for errors, omissions, availability, loss, or damage arising from their use.
Climate projections use NASA NEX-GDDP-CMIP6 v2.0, accessed September 20, 2026, with 25 models. Weather & Vines subsets and aggregates the source fields. Source files and derived projection data are under CC BY-SA 4.0; the full roster and limitations are listed in the climate atlas methods.
The Sonoma & Mendocino model uses a April 1–October 31 growing season, base 10°C GDD, and an operational hot-day marker of 32°C.