United States · Detailed regional profile
Willamette Valley
Sign in to followOregon's best-known cool-climate wine region, especially for Pinot Noir and Chardonnay.
The growing season is long and cool. Spring frost, the amount of summer warmth, and autumn rain can all shape the year.
Climate comparisons use the 1991–2020 combined regional record · updated through Aug 20, 2026.
Current conditions
Observations through Aug 31, 2026 · 00:30 UTC
Temperature24.1°C
Dew Point8.7°C
Relative Humidity37%
24h Rainfall0.9 mmmodeled IFS total through Aug 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.
- CRVO — CORVALLIS · 30% regional weight
- KMMV — McMinnville, McMinnville Municipal Airport · 70% regional weight
NOAA National Weather Service observations. Station readings are point measurements and may not represent every vineyard elevation or exposure.
Vintage explorer
Mean temperature16.1°C
Temperature anomaly+0.9°Cvs 1991-2020
Growing degree days1022base 10°C
Hot days11≥ 32°C
What stood out in 2026
Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation. Frost exposure can vary sharply from one site to the next.
Drier than baseline · Moderate confidence
Growing-season precipitation was 294 mm below the 1991–2020 baseline.
Less rain often lowers disease pressure, but vines may depend more on stored soil water or irrigation.
Spring frost recorded · Low confidence
The regional record had 1 spring day(s) at or below 0°C.
Frost exposure can vary sharply from one site to the next.
2026 month by month
Replay the 2026 growing season
Closest weather matches
How similar years are calculated
Method analog-v1-2026-07 standardizes six weather measures across 0 complete ARCO ERA5 comparison years, then measures the distance between them. The calculation runs when the page is requested.
View historical chart data as a table
| Year | Temperature anomaly | Rainfall anomaly | Hot days |
|---|---|---|---|
| 1991 | -0.5°C | -41 mm | 10 |
| 1992 | +1.1°C | -108 mm | 18 |
| 1993 | -0.1°C | +151 mm | 5 |
| 1994 | +0.2°C | -25 mm | 7 |
| 1995 | +0.0°C | +63 mm | 8 |
| 1996 | -0.4°C | +126 mm | 15 |
| 1997 | +0.1°C | +177 mm | 5 |
| 1998 | +0.0°C | -1 mm | 16 |
| 1999 | -0.8°C | -95 mm | 1 |
| 2000 | -0.4°C | -109 mm | 4 |
| 2001 | -0.7°C | -59 mm | 3 |
| 2002 | -0.4°C | -208 mm | 11 |
| 2003 | +0.5°C | -43 mm | 18 |
| 2004 | +0.7°C | -6 mm | 13 |
| 2005 | -0.0°C | +123 mm | 13 |
| 2006 | +0.1°C | -150 mm | 15 |
| 2007 | -0.5°C | -74 mm | 7 |
| 2008 | -1.0°C | -129 mm | 14 |
| 2009 | -0.1°C | -34 mm | 16 |
| 2010 | -0.8°C | +194 mm | 10 |
| 2011 | -1.0°C | +28 mm | 7 |
| 2012 | -0.4°C | +207 mm | 9 |
| 2013 | +0.2°C | +22 mm | 9 |
| 2014 | +1.1°C | +84 mm | 15 |
| 2015 | +1.3°C | -134 mm | 22 |
| 2016 | +0.6°C | +117 mm | 15 |
| 2017 | +0.3°C | +123 mm | 17 |
| 2018 | +0.3°C | -117 mm | 21 |
| 2019 | -0.0°C | -2 mm | 6 |
| 2020 | +0.3°C | -80 mm | 12 |
| 2021 | +0.7°C | -129 mm | 20 |
| 2022 | +0.6°C | +19 mm | 20 |
| 2023 | +0.7°C | -38 mm | 15 |
| 2024 | +0.7°C | -89 mm | 19 |
| 2025 | +0.9°C | -43 mm | 17 |
| 2026 | +0.9°C | -294 mm | 11 |
winter
6.4°C
+1.1°C vs baseline
484 mm rain · -51 mm
spring
11.9°C
+1.2°C vs baseline
230 mm rain · -96 mm
summer
19.5°C
+0.7°C vs baseline
39 mm rain · -28 mm
harvest
Incomplete seasonal record
Temperature and rainfall are withheld for this window.
Weather events
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 +54.1 GDD per decade. The 95% interval is +15.3 to +92.8 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 March 15–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 | 1186 GDD | -75 GDD |
| 1992 | 1470 GDD | +209 GDD |
| 1993 | 1194 GDD | -67 GDD |
| 1994 | 1288 GDD | +28 GDD |
| 1995 | 1265 GDD | +4 GDD |
| 1996 | 1181 GDD | -80 GDD |
| 1997 | 1278 GDD | +17 GDD |
| 1998 | 1277 GDD | +16 GDD |
| 1999 | 1112 GDD | -149 GDD |
| 2000 | 1156 GDD | -105 GDD |
| 2001 | 1127 GDD | -134 GDD |
| 2002 | 1194 GDD | -67 GDD |
| 2003 | 1380 GDD | +120 GDD |
| 2004 | 1381 GDD | +120 GDD |
| 2005 | 1242 GDD | -19 GDD |
| 2006 | 1291 GDD | +30 GDD |
| 2007 | 1144 GDD | -117 GDD |
| 2008 | 1135 GDD | -126 GDD |
| 2009 | 1267 GDD | +6 GDD |
| 2010 | 1083 GDD | -178 GDD |
| 2011 | 1085 GDD | -175 GDD |
| 2012 | 1197 GDD | -64 GDD |
| 2013 | 1304 GDD | +44 GDD |
| 2014 | 1490 GDD | +229 GDD |
| 2015 | 1514 GDD | +253 GDD |
| 2016 | 1346 GDD | +85 GDD |
| 2017 | 1317 GDD | +56 GDD |
| 2018 | 1336 GDD | +75 GDD |
| 2019 | 1239 GDD | -22 GDD |
| 2020 | 1347 GDD | +86 GDD |
| 2021 | 1436 GDD | +175 GDD |
| 2022 | 1411 GDD | +150 GDD |
| 2023 | 1487 GDD | +226 GDD |
| 2024 | 1388 GDD | +127 GDD |
| 2025 | 1431 GDD | +170 GDD |
- Growing-season mean temperature
- +0.23 °C per decade 95% interval +0.04 to +0.43
- Growing degree days
- +54.05 GDD per decade 95% interval +15.26 to +92.85
- Growing-season precipitation
- -9.61 mm per decade 95% interval -41.01 to +21.79
- Hot days
- +2.68 days per decade 95% interval +1.37 to +3.99
- Spring frost days
- +0.96 days per decade 95% interval -0.38 to +2.29
- Longest dry spell
- +6.02 days per decade 95% interval +1.07 to +10.97
Last Updated August 20, 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 | +1.4°C | +1.0 to +2.3°C | 25 |
| 2061-2075 | +1.9°C | +1.5 to +2.9°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 | Sun | Mon | Tue | Wed | Thu | Fri | Sat | Sun | Mon | Tue |
|---|---|---|---|---|---|---|---|---|---|---|
| High | 23°C | 29°C | 22°C | 20°C | 16°C | 19°C | 19°C | 23°C | 25°C | 26°C |
| Low | 11°C | 13°C | 15°C | 13°C | 14°C | 13°C | 10°C | 9°C | 11°C | 13°C |
| Rain | 0.0 mm | 0.0 mm | 1.0 mm | 7.2 mm | 21.5 mm | 2.8 mm | 0.1 mm | 0.0 mm | 0.0 mm | 0.0 mm |
Across the typical year: Early August has the warmest median afternoon high (28.5°C); Late December has the coolest (7.6°C). Wet days are most frequent in Late November (73%) and least frequent in Early August (7%). 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 | 8.1°C (6.0–10.3°C) | 1.6°C (-0.6–4.2°C) | 67% | 82.0 mm (47.3–111.1 mm) |
| Jan 16–31 | 9.1°C (7.1–10.9°C) | 2.1°C (-0.4–4.4°C) | 62% | 87.9 mm (60.6–132.3 mm) |
| Feb 1–15 | 10.4°C (8.6–12.3°C) | 1.9°C (-0.2–4.3°C) | 59% | 54.5 mm (33.4–88.9 mm) |
| Feb 16–29 | 10.8°C (8.8–12.8°C) | 2.0°C (-0.1–4.5°C) | 65% | 66.2 mm (36.4–92.1 mm) |
| Mar 1–15 | 12.2°C (9.9–14.7°C) | 2.9°C (0.8–5.2°C) | 65% | 63.6 mm (36.8–111.6 mm) |
| Mar 16–31 | 13.2°C (11.3–15.6°C) | 3.3°C (1.8–5.2°C) | 65% | 64.2 mm (48.3–95.3 mm) |
| Apr 1–15 | 13.9°C (12.3–16.5°C) | 4.2°C (2.7–6.1°C) | 70% | 55.3 mm (40.9–83.5 mm) |
| Apr 16–30 | 16.3°C (13.9–19.0°C) | 5.3°C (3.6–6.9°C) | 55% | 40.3 mm (20.7–65.4 mm) |
| May 1–15 | 18.2°C (15.4–21.8°C) | 6.8°C (4.9–8.6°C) | 41% | 29.3 mm (14.7–48.7 mm) |
| May 16–31 | 19.8°C (17.0–23.2°C) | 8.6°C (6.9–10.0°C) | 44% | 30.9 mm (15.1–59.4 mm) |
| Jun 1–15 | 21.2°C (18.4–24.1°C) | 9.4°C (7.8–10.7°C) | 40% | 26.6 mm (12.5–40.4 mm) |
| Jun 16–30 | 23.3°C (20.7–26.7°C) | 10.4°C (8.9–11.8°C) | 24% | 15.3 mm (5.1–23.7 mm) |
| Jul 1–15 | 26.4°C (23.7–29.1°C) | 11.6°C (10.3–12.9°C) | 10% | 3.0 mm (1.0–8.0 mm) |
| Jul 16–31 | 28.2°C (25.7–31.4°C) | 12.4°C (11.1–13.8°C) | 8% | 1.2 mm (0.2–2.8 mm) |
| Aug 1–15 | 28.5°C (25.7–31.1°C) | 12.5°C (11.2–13.7°C) | 7% | 2.7 mm (0.3–5.2 mm) |
| Aug 16–31 | 27.3°C (24.8–29.8°C) | 11.8°C (10.3–13.1°C) | 13% | 4.4 mm (1.3–14.3 mm) |
| Sep 1–15 | 25.8°C (22.5–28.8°C) | 10.7°C (9.1–12.2°C) | 16% | 7.6 mm (1.4–25.5 mm) |
| Sep 16–30 | 23.0°C (20.2–26.0°C) | 9.4°C (7.7–11.1°C) | 30% | 19.5 mm (9.2–37.0 mm) |
| Oct 1–15 | 18.5°C (16.3–21.8°C) | 7.3°C (5.2–9.3°C) | 41% | 33.2 mm (16.9–51.6 mm) |
| Oct 16–31 | 16.0°C (13.8–18.1°C) | 5.9°C (3.7–8.1°C) | 50% | 65.4 mm (27.2–83.0 mm) |
| Nov 1–15 | 12.6°C (11.0–14.2°C) | 4.6°C (2.1–7.1°C) | 62% | 68.3 mm (35.4–102.8 mm) |
| Nov 16–30 | 10.1°C (8.3–11.7°C) | 2.9°C (0.5–5.3°C) | 73% | 115.8 mm (63.9–144.5 mm) |
| Dec 1–15 | 8.3°C (6.4–10.0°C) | 1.9°C (-0.5–4.1°C) | 70% | 111.9 mm (53.1–141.1 mm) |
| Dec 16–31 | 7.6°C (5.6–9.3°C) | 1.5°C (-0.7–3.7°C) | 67% | 104.4 mm (69.8–143.1 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 August 20, 2026
Season to date
Growing season heat and rainfall
Mar 15–Aug 29, 2026
Growing degree days1022.9base 10°C
Growing-season rainfall180.9 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 |
|---|---|---|---|---|
| 2026-03-15 | 0.0 | 0.4 | 0.8 mm | 6.8 mm |
| 2026-03-16 | 2.3 | 0.5 | 1.4 mm | 12.0 mm |
| 2026-03-17 | 5.6 | 0.7 | 1.4 mm | 16.0 mm |
| 2026-03-18 | 9.2 | 1.0 | 1.4 mm | 19.3 mm |
| 2026-03-19 | 13.5 | 1.5 | 2.0 mm | 22.6 mm |
| 2026-03-20 | 17.0 | 2.0 | 3.1 mm | 27.0 mm |
| 2026-03-21 | 17.0 | 2.4 | 5.8 mm | 31.8 mm |
| 2026-03-22 | 17.0 | 2.7 | 5.9 mm | 37.4 mm |
| 2026-03-23 | 17.0 | 2.9 | 6.0 mm | 42.1 mm |
| 2026-03-24 | 17.5 | 3.2 | 11.2 mm | 46.9 mm |
| 2026-03-25 | 17.5 | 3.5 | 15.5 mm | 51.1 mm |
| 2026-03-26 | 17.5 | 3.8 | 16.0 mm | 55.6 mm |
| 2026-03-27 | 17.5 | 4.0 | 16.1 mm | 60.5 mm |
| 2026-03-28 | 17.5 | 4.3 | 16.1 mm | 65.0 mm |
| 2026-03-29 | 17.5 | 4.9 | 16.5 mm | 70.6 mm |
| 2026-03-30 | 17.5 | 5.7 | 17.0 mm | 75.2 mm |
| 2026-03-31 | 17.5 | 6.6 | 17.7 mm | 79.3 mm |
| 2026-04-01 | 17.5 | 7.5 | 32.1 mm | 82.3 mm |
| 2026-04-02 | 17.5 | 8.2 | 40.6 mm | 85.5 mm |
| 2026-04-03 | 17.5 | 8.9 | 41.1 mm | 88.4 mm |
| 2026-04-04 | 18.9 | 9.5 | 41.1 mm | 91.6 mm |
| 2026-04-05 | 24.1 | 10.0 | 41.1 mm | 96.2 mm |
| 2026-04-06 | 30.2 | 11.0 | 41.1 mm | 100.7 mm |
| 2026-04-07 | 32.5 | 12.1 | 41.1 mm | 106.1 mm |
| 2026-04-08 | 34.1 | 13.3 | 41.1 mm | 112.2 mm |
| 2026-04-09 | 37.4 | 14.2 | 41.3 mm | 116.9 mm |
| 2026-04-10 | 42.4 | 15.0 | 44.6 mm | 121.2 mm |
| 2026-04-11 | 45.6 | 15.9 | 59.3 mm | 125.0 mm |
| 2026-04-12 | 46.4 | 17.0 | 64.9 mm | 129.1 mm |
| 2026-04-13 | 46.5 | 17.7 | 67.1 mm | 133.5 mm |
| 2026-04-14 | 46.5 | 18.1 | 72.5 mm | 138.2 mm |
| 2026-04-15 | 46.5 | 18.9 | 93.7 mm | 142.3 mm |
| 2026-04-16 | 46.5 | 20.0 | 97.7 mm | 146.0 mm |
| 2026-04-17 | 46.5 | 21.3 | 98.1 mm | 149.6 mm |
| 2026-04-18 | 48.4 | 22.8 | 98.2 mm | 152.4 mm |
| 2026-04-19 | 53.5 | 24.2 | 98.2 mm | 154.7 mm |
| 2026-04-20 | 57.9 | 25.9 | 100.5 mm | 157.6 mm |
| 2026-04-21 | 60.7 | 27.4 | 110.6 mm | 159.9 mm |
| 2026-04-22 | 61.3 | 28.6 | 115.1 mm | 163.3 mm |
| 2026-04-23 | 61.6 | 30.1 | 116.0 mm | 167.2 mm |
| 2026-04-24 | 62.5 | 31.7 | 116.1 mm | 172.1 mm |
| 2026-04-25 | 63.9 | 33.7 | 116.1 mm | 174.7 mm |
| 2026-04-26 | 65.2 | 35.5 | 116.2 mm | 177.7 mm |
| 2026-04-27 | 65.4 | 37.4 | 116.3 mm | 180.4 mm |
| 2026-04-28 | 66.7 | 39.5 | 116.3 mm | 182.8 mm |
| 2026-04-29 | 67.8 | 41.5 | 116.3 mm | 185.4 mm |
| 2026-04-30 | 72.6 | 43.5 | 116.4 mm | 187.7 mm |
| 2026-05-01 | 78.3 | 45.7 | 116.7 mm | 189.2 mm |
| 2026-05-02 | 83.4 | 48.2 | 117.1 mm | 191.9 mm |
| 2026-05-03 | 92.3 | 50.9 | 117.2 mm | 195.3 mm |
| 2026-05-04 | 99.4 | 53.8 | 117.3 mm | 197.9 mm |
| 2026-05-05 | 105.3 | 56.9 | 117.4 mm | 200.0 mm |
| 2026-05-06 | 110.4 | 59.7 | 117.4 mm | 201.8 mm |
| 2026-05-07 | 115.7 | 62.6 | 117.4 mm | 203.5 mm |
| 2026-05-08 | 119.9 | 65.6 | 117.4 mm | 205.8 mm |
| 2026-05-09 | 125.3 | 68.4 | 117.5 mm | 207.8 mm |
| 2026-05-10 | 130.8 | 71.4 | 117.5 mm | 209.7 mm |
| 2026-05-11 | 137.2 | 74.6 | 117.5 mm | 211.6 mm |
| 2026-05-12 | 144.9 | 77.7 | 118.0 mm | 213.5 mm |
| 2026-05-13 | 149.5 | 81.2 | 123.9 mm | 215.4 mm |
| 2026-05-14 | 152.8 | 85.5 | 124.5 mm | 217.9 mm |
| 2026-05-15 | 153.6 | 89.8 | 126.0 mm | 220.8 mm |
| 2026-05-16 | 154.3 | 94.0 | 129.6 mm | 223.4 mm |
| 2026-05-17 | 154.7 | 98.1 | 131.7 mm | 227.2 mm |
| 2026-05-18 | 157.6 | 102.2 | 132.2 mm | 230.5 mm |
| 2026-05-19 | 161.0 | 106.1 | 132.2 mm | 233.4 mm |
| 2026-05-20 | 165.8 | 109.6 | 132.3 mm | 236.0 mm |
| 2026-05-21 | 172.9 | 113.1 | 132.3 mm | 238.7 mm |
| 2026-05-22 | 180.6 | 117.1 | 132.3 mm | 241.4 mm |
| 2026-05-23 | 187.4 | 121.7 | 132.3 mm | 243.3 mm |
| 2026-05-24 | 194.0 | 126.5 | 132.3 mm | 245.2 mm |
| 2026-05-25 | 197.7 | 131.3 | 136.3 mm | 247.2 mm |
| 2026-05-26 | 201.6 | 136.1 | 139.3 mm | 249.1 mm |
| 2026-05-27 | 208.2 | 141.0 | 139.4 mm | 251.2 mm |
| 2026-05-28 | 215.9 | 145.7 | 139.5 mm | 253.4 mm |
| 2026-05-29 | 220.2 | 150.7 | 140.7 mm | 255.6 mm |
| 2026-05-30 | 222.4 | 155.8 | 141.3 mm | 257.1 mm |
| 2026-05-31 | 225.2 | 161.5 | 141.3 mm | 259.2 mm |
| 2026-06-01 | 231.8 | 167.3 | 141.3 mm | 261.2 mm |
| 2026-06-02 | 241.5 | 172.8 | 141.3 mm | 263.3 mm |
| 2026-06-03 | 249.2 | 178.5 | 141.9 mm | 265.1 mm |
| 2026-06-04 | 255.5 | 184.4 | 142.0 mm | 267.1 mm |
| 2026-06-05 | 259.7 | 190.1 | 142.2 mm | 269.5 mm |
| 2026-06-06 | 262.9 | 195.5 | 144.1 mm | 271.7 mm |
| 2026-06-07 | 265.3 | 200.9 | 145.3 mm | 273.9 mm |
| 2026-06-08 | 268.5 | 206.1 | 154.7 mm | 275.9 mm |
| 2026-06-09 | 272.6 | 211.3 | 159.2 mm | 277.6 mm |
| 2026-06-10 | 277.2 | 216.2 | 160.7 mm | 279.7 mm |
| 2026-06-11 | 282.9 | 221.5 | 160.7 mm | 281.1 mm |
| 2026-06-12 | 290.6 | 227.0 | 160.8 mm | 282.5 mm |
| 2026-06-13 | 301.5 | 232.7 | 160.8 mm | 284.3 mm |
| 2026-06-14 | 315.5 | 237.9 | 160.8 mm | 285.7 mm |
| 2026-06-15 | 331.1 | 243.2 | 160.8 mm | 287.1 mm |
| 2026-06-16 | 342.7 | 248.7 | 160.8 mm | 288.1 mm |
| 2026-06-17 | 351.5 | 254.5 | 160.8 mm | 289.1 mm |
| 2026-06-18 | 360.3 | 260.8 | 160.8 mm | 290.0 mm |
| 2026-06-19 | 370.5 | 267.0 | 160.8 mm | 291.0 mm |
| 2026-06-20 | 378.8 | 273.8 | 160.8 mm | 292.3 mm |
| 2026-06-21 | 386.5 | 281.1 | 160.8 mm | 293.1 mm |
| 2026-06-22 | 397.4 | 287.9 | 160.8 mm | 294.0 mm |
| 2026-06-23 | 410.6 | 294.8 | 160.8 mm | 295.1 mm |
| 2026-06-24 | 423.4 | 302.1 | 160.8 mm | 296.4 mm |
| 2026-06-25 | 431.3 | 309.8 | 163.9 mm | 297.4 mm |
| 2026-06-26 | 438.5 | 317.9 | 166.8 mm | 298.4 mm |
| 2026-06-27 | 443.4 | 326.5 | 171.1 mm | 299.8 mm |
| 2026-06-28 | 448.8 | 335.0 | 173.8 mm | 301.1 mm |
| 2026-06-29 | 453.7 | 343.3 | 174.9 mm | 302.3 mm |
| 2026-06-30 | 458.8 | 351.8 | 175.1 mm | 302.6 mm |
| 2026-07-01 | 464.5 | 360.3 | 175.2 mm | 303.1 mm |
| 2026-07-02 | 470.5 | 369.0 | 175.2 mm | 303.4 mm |
| 2026-07-03 | 479.7 | 377.4 | 175.2 mm | 303.7 mm |
| 2026-07-04 | 489.1 | 385.6 | 175.2 mm | 304.1 mm |
| 2026-07-05 | 498.6 | 394.0 | 175.2 mm | 304.4 mm |
| 2026-07-06 | 509.4 | 402.7 | 175.2 mm | 304.7 mm |
| 2026-07-07 | 519.6 | 411.6 | 175.2 mm | 304.9 mm |
| 2026-07-08 | 529.8 | 420.9 | 175.2 mm | 305.3 mm |
| 2026-07-09 | 539.1 | 430.5 | 175.2 mm | 306.2 mm |
| 2026-07-10 | 548.5 | 440.0 | 175.2 mm | 306.8 mm |
| 2026-07-11 | 557.5 | 449.3 | 175.3 mm | 307.0 mm |
| 2026-07-12 | 565.8 | 459.1 | 175.3 mm | 307.3 mm |
| 2026-07-13 | 575.7 | 468.9 | 175.3 mm | 307.6 mm |
| 2026-07-14 | 587.1 | 478.6 | 175.3 mm | 307.8 mm |
| 2026-07-15 | 598.6 | 488.5 | 175.3 mm | 308.0 mm |
| 2026-07-16 | 606.5 | 498.7 | 178.3 mm | 308.5 mm |
| 2026-07-17 | 614.2 | 508.7 | 178.4 mm | 309.3 mm |
| 2026-07-18 | 623.0 | 518.5 | 178.4 mm | 310.0 mm |
| 2026-07-19 | 633.7 | 528.4 | 178.4 mm | 310.4 mm |
| 2026-07-20 | 646.8 | 538.4 | 178.4 mm | 310.6 mm |
| 2026-07-21 | 662.7 | 548.8 | 178.4 mm | 310.9 mm |
| 2026-07-22 | 678.1 | 559.6 | 179.3 mm | 311.4 mm |
| 2026-07-23 | 690.7 | 570.3 | 180.2 mm | 311.8 mm |
| 2026-07-24 | 702.5 | 580.9 | 180.3 mm | 312.0 mm |
| 2026-07-25 | 711.3 | 591.3 | 180.3 mm | 312.1 mm |
| 2026-07-26 | 721.4 | 602.1 | 180.3 mm | 312.2 mm |
| 2026-07-27 | 731.0 | 613.4 | 180.3 mm | 312.2 mm |
| 2026-07-28 | 740.7 | 624.7 | 180.3 mm | 312.3 mm |
| 2026-07-29 | 750.7 | 635.7 | 180.3 mm | 312.5 mm |
| 2026-07-30 | 760.2 | 646.6 | 180.3 mm | 312.9 mm |
| 2026-07-31 | 770.8 | 657.2 | 180.3 mm | 313.0 mm |
| 2026-08-01 | 780.5 | 667.7 | 180.5 mm | 313.1 mm |
| 2026-08-02 | 788.3 | 678.1 | 180.5 mm | 313.2 mm |
| 2026-08-03 | 797.6 | 688.5 | 180.5 mm | 313.3 mm |
| 2026-08-04 | 810.3 | 699.6 | 180.5 mm | 313.3 mm |
| 2026-08-05 | 823.2 | 710.3 | 180.5 mm | 313.5 mm |
| 2026-08-06 | 836.8 | 720.4 | 180.5 mm | 313.8 mm |
| 2026-08-07 | 849.8 | 730.0 | 180.5 mm | 314.5 mm |
| 2026-08-08 | 862.5 | 739.7 | 180.5 mm | 314.8 mm |
| 2026-08-09 | 873.8 | 750.0 | 180.5 mm | 315.1 mm |
| 2026-08-10 | 884.1 | 760.5 | 180.5 mm | 315.3 mm |
| 2026-08-11 | 895.2 | 770.8 | 180.5 mm | 315.6 mm |
| 2026-08-12 | 906.3 | 781.2 | 180.7 mm | 315.9 mm |
| 2026-08-13 | 916.9 | 792.0 | 180.7 mm | 316.1 mm |
| 2026-08-14 | 927.4 | 803.1 | 180.7 mm | 316.2 mm |
| 2026-08-15 | 936.9 | 813.8 | 180.7 mm | 316.4 mm |
| 2026-08-16 | 947.2 | 824.1 | 180.7 mm | 316.6 mm |
| 2026-08-17 | 957.3 | 834.3 | 180.7 mm | 316.9 mm |
| 2026-08-18 | 967.9 | 844.5 | 180.7 mm | 317.1 mm |
| 2026-08-19 | 979.0 | 854.8 | 180.7 mm | 317.8 mm |
| 2026-08-20 | 992.3 | 864.8 | 180.7 mm | 318.6 mm |
| 2026-08-21 | 1003.2 | 874.2 | 180.7 mm | 319.4 mm |
| 2026-08-22 | 1011.8 | 883.5 | 180.7 mm | 320.5 mm |
| 2026-08-23 | 1022.9 | 892.5 | 180.9 mm | 321.3 mm |
Forecast outlook
ECMWF IFS 0.25° via Herbie · run Aug 30, 2026 at 00:00 UTC
10-day totals compared with the 1991–2020 combined regional record
- GDD accumulation
- 68 GDDvs 85 GDD average
- Total rainfall
- 32.7 mmvs 7.5 mm average
A notable amount of rain is forecast during the period. The 10-day total meets the 30 mm forecast threshold, with rain forecast Sep 1–5.
Sun8/30
23°Cavg 26°C
11°Cavg 12°C
+7 GDD
0.0 mm
Mon8/31
29°Cavg 26°C
13°Cavg 11°C
+9 GDD
0.0 mm
Tue9/1
22°Cavg 26°C
15°Cavg 11°C
+8 GDD
1.0 mm
Wed9/2
20°Cavg 27°C
13°Cavg 11°C
+6 GDD
7.2 mm
Thu9/3
16°Cavg 27°C
14°Cavg 11°C
+5 GDD
21.5 mm
Fri9/4
19°Cavg 26°C
13°Cavg 11°C
+5 GDD
2.8 mm
Sat9/5
19°Cavg 26°C
10°Cavg 11°C
+5 GDD
0.1 mm
Sun9/6
23°Cavg 26°C
9°Cavg 10°C
+6 GDD
0.0 mm
Mon9/7
25°Cavg 26°C
11°Cavg 10°C
+7 GDD
0.0 mm
Tue9/8
26°Cavg 26°C
13°Cavg 11°C
+10 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 August 23, 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 Willamette Valley model uses a March 15–October 31 growing season, base 10°C GDD, and an operational hot-day marker of 32°C.
- Oregon Wine Board: Willamette Valley
- WMO climate normals guidance
- Willamette Valley Wineries Association: vintage reviews
The historical series uses 3 ERA5 locations, 34 temperature stations, and 39 rain stations. Interpretation confidence: moderate. Geometry confidence: authoritative. Rules: willamette-v2-2026-07.