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France · Multi-region weather view

Rhône Valley

Vineyards following the Rhône from the continental north to the Mediterranean south.

The Mistral, summer heat, and rainfall differ markedly between narrow northern slopes and the broad southern valley.

Climate comparisons use the 1991–2020 combined regional record · updated through Aug 20, 2026.

Current conditions

Observations through Aug 30, 2026 · 06:00 UTC

Temperature18.8°C
Dew Point14.6°C
Relative Humidity77%
24h Rainfall0.0 mmmodeled IFS total through Aug 29

Vintage explorer

Compare this vintage →

Moderately warmer and significantly drier than normal.

Mean temperature20.4°C
Temperature anomaly+1.5°Cvs 1991-2020
Growing degree days2410base 10°C
Hot days10≥ 35°C

What stood out in 2023

Warm weather can speed ripening and leave grapes with less acidity. 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.

Warmer growing season · High confidence

Mean growing-season temperature was +1.5°C versus the 1991–2020 baseline.

Warm weather can speed ripening and leave grapes with less acidity.

Drier than baseline · Moderate confidence

Growing-season precipitation was 140 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 2 spring day(s) at or below 0°C.

Frost exposure can vary sharply from one site to the next.

How unusual was 2023?

The ranking compares vintages that meet the data-coverage threshold and use the same source, regional rules, and 1991-2020 baseline.

Growing-season temperature

2nd warmest of 35 vintages Warmer than 33 of 34 other vintages 20.4°C

Growing-season rainfall

4th driest of 35 vintages Drier than 31 of 34 other vintages 351.5 mm

Heat accumulation

2nd highest of 35 vintages Higher than 33 of 34 other vintages 2411 GDD

Hot days

5th most of 35 vintages More than 28 of 34 other vintages 10 days

2023 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. 1–31
    Frost watchGrowing season

    Heat accumulation

    2023 43 GDD
    Typical 48 GDD

    Rainfall

    2023 25.7 mm
    Typical 44.4 mm
    2023 freezing days
    2
    Typical
    1.1

    Drier than the typical month.

  2. 1–30
    Frost watchGrowing season

    Heat accumulation

    2023 119 GDD
    Typical 111 GDD

    Rainfall

    2023 18.0 mm
    Typical 67.3 mm
    2023 freezing days
    0
    Typical
    0.0

    Drier than the typical month.

  3. 1–31
    Frost watchGrowing season

    Heat accumulation

    2023 260 GDD
    Typical 235 GDD

    Rainfall

    2023 42.4 mm
    Typical 63.5 mm
    2023 freezing days
    0
    Typical
    0.0

    Close to the typical monthly pattern.

  4. 1–30
    Growing season

    Heat accumulation

    2023 408 GDD
    Typical 351 GDD

    Rainfall

    2023 75.6 mm
    Typical 45.1 mm

    Wetter than the typical month.

  5. 1–31
    Growing season

    Heat accumulation

    2023 491 GDD
    Typical 445 GDD

    Rainfall

    2023 21.5 mm
    Typical 36.3 mm

    Drier than the typical month.

  6. 1–31
    Growing seasonHarvest window

    Heat accumulation

    2023 467 GDD
    Typical 436 GDD

    Rainfall

    2023 55.4 mm
    Typical 45.6 mm

    Close to the typical monthly pattern.

  7. 1–30
    Growing seasonHarvest window

    Heat accumulation

    2023 361 GDD
    Typical 295 GDD

    Rainfall

    2023 37.9 mm
    Typical 100.8 mm

    Heat accumulation ran ahead of the typical month.

  8. 1–31
    Growing seasonHarvest window

    Heat accumulation

    2023 261 GDD
    Typical 176 GDD

    Rainfall

    2023 95.3 mm
    Typical 109.9 mm

    Heat accumulation ran ahead of the typical month.

View milestone calendar data as a table
Month2023 GDDTypical GDD2023 rainfallTypical rainfall2023 freezing daysTypical freezing days
March 2023 43 GDD 48 GDD 25.7 mm 44.4 mm 21.1
April 2023 119 GDD 111 GDD 18.0 mm 67.3 mm 00.0
May 2023 260 GDD 235 GDD 42.4 mm 63.5 mm 00.0
June 2023 408 GDD 351 GDD 75.6 mm 45.1 mm Outside frost windowOutside frost window
July 2023 491 GDD 445 GDD 21.5 mm 36.3 mm Outside frost windowOutside frost window
August 2023 467 GDD 436 GDD 55.4 mm 45.6 mm Outside frost windowOutside frost window
September 2023 361 GDD 295 GDD 37.9 mm 100.8 mm Outside frost windowOutside frost window
October 2023 261 GDD 176 GDD 95.3 mm 109.9 mm Outside frost windowOutside 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 Aug 20, 2026.

Replay the 2023 growing season

231 daily regional observations

Move through the season to follow temperature, rainfall, accumulated heat, and recorded weather events day by day.

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 Aug 20, 2026.

Closest weather matches

These years had the most similar growing-season and harvest weather.

  1. Closest match

    2019

    Most alike in Hot-day count and Harvest precipitation.

    Hot-day count
    more hot days: 3 days
    Harvest precipitation
    more rain: 40.0 mm

    Largest difference: Growing-season mean temperature — cooler

    View 2019 →

  2. Second closest

    2009

    Most alike in Harvest precipitation and Growing-season precipitation.

    Harvest precipitation
    less rain: 9.4 mm
    Growing-season precipitation
    more rain: 75.1 mm

    Largest difference: Growing-season mean temperature — cooler

    View 2009 →

  3. Third closest

    2006

    Most alike in Hot-day count and Growing degree days.

    Hot-day count
    fewer hot days: 3 days
    Growing degree days
    lower: 142 GDD

    Largest difference: Spring frost exposure — more frost-exposure days

    View 2006 →
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: 2019 0.757; 2009 0.819; 2006 0.902.

Growing-season temperature anomalyCompared with 1991-2020
Temperature anomaly by vintage, 1991 to 2026 A line above zero indicates a warmer growing season than the 1991–2020 baseline. Select a point to inspect that vintage. +2.5°C −2.5°C 1991 2000 2010 2020 2026
Growing-season rainfall anomaly
Rainfall anomaly by vintage, 1991 to 2026 Bars show millimeters above or below the 1991–2020 growing-season baseline. Select a bar to inspect that vintage. +250 mm −250 mm 1991 2000 2010 2020 2026
View historical chart data as a table
YearTemperature anomalyRainfall anomalyHot days
1991-0.7°C-71 mm0
1992-1.0°C+115 mm0
1993-0.9°C+223 mm0
1994-0.1°C+124 mm3
1995-0.5°C-71 mm1
1996-1.3°C-32 mm0
1997-0.2°C-114 mm0
1998-0.6°C+40 mm1
1999+0.1°C+193 mm0
2000-0.3°C+106 mm1
2001+0.1°C-20 mm0
2002-0.5°C+134 mm0
2003+1.0°C-76 mm22
2004-0.0°C-41 mm1
2005+0.3°C-70 mm2
2006+0.8°C-43 mm7
2007-0.2°C-190 mm0
2008-0.9°C+239 mm0
2009+0.8°C-65 mm4
2010-0.3°C-44 mm1
2011+0.5°C-154 mm2
2012+0.4°C+41 mm4
2013-0.5°C+111 mm2
2014+0.4°C-41 mm0
2015+0.5°C+67 mm10
2016+0.1°C-47 mm0
2017+0.8°C-228 mm9
2018+1.0°C+117 mm8
2019+0.8°C-84 mm13
2020+0.5°C-119 mm4
2021-0.3°C+64 mm2
2022+2.1°C-81 mm23
2023+1.5°C-140 mm10
2024+0.6°C+124 mm10
2025+0.9°C+17 mm17
2026+2.2°C-238 mm38

winter

7.7°C

+0.8°C vs baseline

131 mm rain · -27 mm

spring

14.6°C

+0.6°C vs baseline

86 mm rain · -89 mm

summer

24.9°C

+1.4°C vs baseline

152 mm rain · +25 mm

harvest

21.4°C

+2.4°C vs baseline

188 mm rain · -46 mm

Weather events

Periods that crossed one of the published regional thresholds, shown in date order.

  1. Spring frost exposure

    Minimum temperature
    -0.8°C
    Duration
    2 days
    Severe-freeze days
    0 days

    The regional model recorded freezing temperatures during spring.

  2. Dry spell

    Duration
    18 days
    Total rain
    1.8 mm
    Daily cutoff
    1.0 mm/day

  3. Heat episode

    Peak temperature
    36.7°C
    Duration
    2 days
    Heat accumulation
    37 GDD

  4. Dry spell

    Duration
    14 days
    Total rain
    1.1 mm
    Daily cutoff
    1.0 mm/day

  5. Dry spell

    Duration
    26 days
    Total rain
    0.6 mm
    Daily cutoff
    1.0 mm/day

  6. Heat episode

    Peak temperature
    39.2°C
    Duration
    7 days
    Heat accumulation
    136 GDD

  7. Concentrated harvest rain

    Total rain
    55.0 mm
    Highest 3-day total
    54.7 mm
    Trigger threshold
    43.2 mm

    A large share of the season's rain fell during the harvest period.

  8. Dry spell

    Duration
    15 days
    Total rain
    0.3 mm
    Daily cutoff
    1.0 mm/day

  9. Dry spell

    Duration
    25 days
    Total rain
    1.8 mm
    Daily cutoff
    1.0 mm/day

  10. Concentrated harvest rain

    Total rain
    57.8 mm
    Highest 3-day total
    54.8 mm
    Trigger threshold
    43.2 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 rhone-valley-catalog-v1-2026-07. Source last updated Aug 1, 2026, calculated Aug 29, 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.

Compare regions

Observed record

Historical trends, 1991–2025

Growing degree days changed +111.5 GDD per decade. The 95% interval is +88.7 to +134.3 GDD per decade, based on 35 eligible vintages.

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.

Growing degree days · annual change from the 1991–2020 average1991–2025

Scroll horizontally to inspect the full timeline.

View annual growing degree days data
VintageGrowing degree daysChange from 1991–2020
19911942 GDD-140 GDD
19921870 GDD-213 GDD
19931885 GDD-197 GDD
19942066 GDD-17 GDD
19951975 GDD-108 GDD
19961787 GDD-296 GDD
19972037 GDD-46 GDD
19981955 GDD-128 GDD
19992101 GDD+18 GDD
20002015 GDD-68 GDD
20012092 GDD+10 GDD
20021950 GDD-133 GDD
20032335 GDD+252 GDD
20042077 GDD-5 GDD
20052154 GDD+71 GDD
20062268 GDD+186 GDD
20072041 GDD-42 GDD
20081889 GDD-193 GDD
20092251 GDD+169 GDD
20101997 GDD-86 GDD
20112181 GDD+99 GDD
20122171 GDD+89 GDD
20131985 GDD-97 GDD
20142163 GDD+81 GDD
20152183 GDD+100 GDD
20162095 GDD+12 GDD
20172247 GDD+164 GDD
20182328 GDD+245 GDD
20192248 GDD+165 GDD
20202190 GDD+107 GDD
20212017 GDD-65 GDD
20222564 GDD+481 GDD
20232411 GDD+328 GDD
20242210 GDD+128 GDD
20252286 GDD+203 GDD
Growing-season mean temperature
+0.50 °C per decade 95% interval +0.40 to +0.60
Growing degree days
+111.51 GDD per decade 95% interval +88.72 to +134.30
Growing-season precipitation
-25.84 mm per decade 95% interval -55.01 to +3.33
Hot days
+3.36 days per decade 95% interval +1.98 to +4.74
Spring frost days
-0.02 days per decade 95% interval -0.43 to +0.39
Longest dry spell
+0.87 days per decade 95% interval -1.17 to +2.90

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.

PeriodWeighted medianWeighted central 80%Models per pathway
2021-2040+1.1°C+0.7 to +1.7°C25
2041-2060+1.7°C+1.2 to +2.6°C25
2061-2075+2.1°C+1.6 to +3.5°C25
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

Compare projection measures across regions

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

Detailed forecast outlook

ECMWF IFS 0.25° via Herbie · model run Aug 30, 2026 at 00:00 UTC · retrieved Aug 30, 2026 at 08:22 UTC

Scroll horizontally to see all forecast dates.

DateSunMonTueWedThuFriSatSunMonTue
High 31°C 30°C 30°C 32°C 33°C 34°C 34°C 31°C 30°C 30°C
Low 18°C 19°C 20°C 21°C 22°C 22°C 20°C 21°C 21°C 23°C
Rain 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.3 mm 0.0 mm

Across the typical year: Late July has the warmest median afternoon high (31.2°C); Late January has the coolest (10.0°C). Wet days are most frequent in Early November (37%) and least frequent in Late June (13%). Ties are resolved by calendar order.

Typical afternoon highs and overnight lowsMedians and middle 50% of daily readings

Afternoon highOvernight lowMiddle 50%

Scroll horizontally to inspect all 24 half-month periods.

Typical afternoon highs and overnight lows for Rhône Valley Median daily maximum and minimum temperatures for 24 early and late-month periods under the 1991–2020 baseline. Neutral bands show the 25th to 75th percentile. 0°C10°C20°C30°C JanFebMarAprMayJunJulAugSepOctNovDec
How often a day is wetShare of days with at least 1 mm of rain

Scroll horizontally to inspect all 24 half-month periods.

Wet-day frequency through the typical year for Rhône Valley The fraction of days receiving at least one millimeter of rain in each early and late-month period under the 1991–2020 baseline. 0%25%50%75%100% JanFebMarAprMayJunJulAugSepOctNovDec
View all 24 periods as a table

Scroll horizontally to view all columns.

Rhône Valley typical weather by half-month, 1991–2020
PeriodAfternoon high, median (middle 50%)Overnight low, median (middle 50%)Wet-day frequencyPeriod rain, median (middle 50%)
Jan 1–1510.7°C (7.8–12.7°C)2.9°C (0.6–5.5°C)26%15.3 mm (5.9–48.8 mm)
Jan 16–3110.0°C (7.7–12.4°C)2.7°C (0.4–5.0°C)26%23.9 mm (7.6–44.4 mm)
Feb 1–1511.3°C (8.3–13.4°C)2.4°C (0.1–5.2°C)24%18.0 mm (5.8–32.9 mm)
Feb 16–2912.7°C (10.2–15.1°C)3.9°C (1.0–6.0°C)22%11.5 mm (3.6–20.9 mm)
Mar 1–1514.9°C (12.2–17.3°C)5.1°C (2.8–7.5°C)22%16.2 mm (8.7–28.0 mm)
Mar 16–3116.7°C (14.3–18.8°C)6.6°C (4.5–8.4°C)20%15.5 mm (6.3–32.9 mm)
Apr 1–1518.0°C (15.7–20.2°C)7.7°C (5.9–9.6°C)29%20.1 mm (11.5–42.7 mm)
Apr 16–3019.8°C (16.9–22.1°C)9.2°C (7.3–11.3°C)33%38.7 mm (14.8–52.3 mm)
May 1–1521.7°C (19.2–24.2°C)11.4°C (9.9–13.2°C)32%31.2 mm (15.3–54.3 mm)
May 16–3124.1°C (22.0–26.2°C)13.2°C (11.7–14.8°C)23%22.1 mm (8.4–35.4 mm)
Jun 1–1525.9°C (23.6–28.1°C)15.2°C (13.7–16.7°C)29%33.0 mm (13.6–44.4 mm)
Jun 16–3029.0°C (26.2–31.4°C)17.2°C (15.4–18.8°C)13%9.0 mm (4.0–14.3 mm)
Jul 1–1529.9°C (27.2–32.2°C)18.2°C (16.4–19.8°C)20%14.8 mm (6.2–41.4 mm)
Jul 16–3131.2°C (29.1–32.9°C)19.2°C (17.7–20.3°C)14%8.2 mm (2.9–15.7 mm)
Aug 1–1530.5°C (28.3–32.4°C)18.8°C (17.4–20.0°C)20%15.1 mm (10.2–30.8 mm)
Aug 16–3129.7°C (27.3–32.0°C)18.0°C (16.5–19.4°C)18%16.5 mm (6.9–34.1 mm)
Sep 1–1526.4°C (24.1–28.9°C)15.8°C (13.9–17.5°C)24%28.8 mm (8.3–64.7 mm)
Sep 16–3023.8°C (21.5–26.2°C)13.6°C (11.8–15.7°C)27%48.6 mm (14.0–76.5 mm)
Oct 1–1521.3°C (19.1–23.6°C)12.5°C (10.5–14.3°C)30%40.3 mm (21.0–71.3 mm)
Oct 16–3119.1°C (16.3–21.2°C)10.3°C (7.8–13.0°C)33%57.2 mm (29.2–80.6 mm)
Nov 1–1515.8°C (13.5–17.6°C)8.0°C (5.7–10.4°C)37%47.9 mm (25.4–74.0 mm)
Nov 16–3012.8°C (10.0–15.2°C)5.6°C (2.7–7.9°C)32%38.5 mm (7.3–80.0 mm)
Dec 1–1511.1°C (8.7–13.4°C)3.9°C (1.6–6.1°C)26%19.6 mm (7.7–34.8 mm)
Dec 16–3110.4°C (7.6–12.8°C)3.2°C (0.7–6.1°C)25%21.6 mm (7.4–52.5 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 30, 2026

Growing degree days1827.6base 10°C
Growing-season rainfall253.6 mmweighted regional total
Cumulative growing degree daysBase 10°C

2026 season1991–2020 average

Growing degree days accumulated during the 2026 growing season The solid line accumulates daily mean temperature above 10 degrees Celsius from the configured growing-season start. The dashed line shows the 1991–2020 daily climatological average. 1828 GDD 0 Mar ’26AprMayJunJulAug
Cumulative growing-season rainfallRegional weighted mean

2026 season1991–2020 average

Rainfall accumulated during the 2026 growing season The solid line accumulates daily rainfall in millimeters from the configured growing-season start. The dashed line shows the 1991–2020 daily climatological average. 268 mm 0 Mar ’26AprMayJunJulAug
View growing-season accumulation data
DateSeason GDD1991–2020 average GDDSeason rainfall1991–2020 average rainfall
2026-03-150.01.90.0 mm2.7 mm
2026-03-161.24.20.0 mm5.1 mm
2026-03-173.86.20.0 mm6.6 mm
2026-03-184.28.00.2 mm7.3 mm
2026-03-194.210.00.2 mm7.5 mm
2026-03-204.611.90.2 mm7.8 mm
2026-03-214.614.10.3 mm8.9 mm
2026-03-224.616.027.3 mm10.2 mm
2026-03-235.417.927.4 mm11.8 mm
2026-03-247.319.727.4 mm13.4 mm
2026-03-258.821.527.4 mm15.2 mm
2026-03-268.823.228.8 mm16.9 mm
2026-03-278.824.828.8 mm18.3 mm
2026-03-288.826.828.8 mm19.3 mm
2026-03-299.428.928.8 mm20.0 mm
2026-03-309.630.928.8 mm21.5 mm
2026-03-319.933.428.8 mm23.5 mm
2026-04-0110.235.728.8 mm26.2 mm
2026-04-0210.238.028.8 mm27.2 mm
2026-04-0313.741.128.8 mm29.9 mm
2026-04-0419.744.228.8 mm32.6 mm
2026-04-0524.546.928.8 mm33.4 mm
2026-04-0629.949.628.8 mm34.3 mm
2026-04-0735.352.528.8 mm35.8 mm
2026-04-0840.355.528.8 mm36.5 mm
2026-04-0946.758.128.8 mm39.6 mm
2026-04-1054.461.128.8 mm41.6 mm
2026-04-1161.064.228.9 mm44.2 mm
2026-04-1263.367.238.0 mm45.6 mm
2026-04-1363.370.541.6 mm46.7 mm
2026-04-1466.174.041.6 mm47.9 mm
2026-04-1570.677.141.6 mm52.0 mm
2026-04-1677.380.541.6 mm54.6 mm
2026-04-1784.583.641.6 mm55.8 mm
2026-04-1892.787.141.7 mm56.7 mm
2026-04-19101.090.341.7 mm58.1 mm
2026-04-20108.193.841.7 mm60.2 mm
2026-04-21115.098.241.7 mm62.6 mm
2026-04-22118.5102.949.0 mm63.9 mm
2026-04-23125.8108.049.4 mm66.6 mm
2026-04-24131.3113.349.4 mm70.0 mm
2026-04-25137.1119.049.5 mm73.3 mm
2026-04-26145.6124.649.5 mm77.9 mm
2026-04-27153.7129.749.5 mm81.0 mm
2026-04-28161.4134.749.7 mm84.0 mm
2026-04-29168.7139.549.7 mm87.5 mm
2026-04-30175.4144.450.7 mm90.9 mm
2026-05-01184.1149.450.7 mm94.2 mm
2026-05-02189.8154.950.7 mm98.9 mm
2026-05-03196.9160.551.9 mm101.2 mm
2026-05-04200.6166.4108.9 mm103.3 mm
2026-05-05207.2172.4141.4 mm105.0 mm
2026-05-06212.5178.6144.2 mm105.9 mm
2026-05-07217.6185.0144.3 mm106.8 mm
2026-05-08223.9191.4144.3 mm109.4 mm
2026-05-09230.4198.4146.5 mm112.0 mm
2026-05-10237.3205.8156.9 mm113.9 mm
2026-05-11245.2213.2160.7 mm116.7 mm
2026-05-12250.9220.5160.7 mm118.4 mm
2026-05-13256.5227.4160.7 mm121.0 mm
2026-05-14261.0234.6161.3 mm123.8 mm
2026-05-15263.8241.6162.1 mm125.8 mm
2026-05-16266.7248.6162.1 mm126.8 mm
2026-05-17271.6256.0162.1 mm128.6 mm
2026-05-18277.7263.9162.4 mm131.5 mm
2026-05-19284.3271.3162.4 mm133.6 mm
2026-05-20293.0279.0162.4 mm136.2 mm
2026-05-21303.8286.8162.4 mm137.2 mm
2026-05-22314.6295.3162.4 mm139.2 mm
2026-05-23326.2303.8162.4 mm140.3 mm
2026-05-24338.9312.8162.4 mm141.0 mm
2026-05-25352.6322.0162.5 mm142.3 mm
2026-05-26366.5331.7162.5 mm144.0 mm
2026-05-27380.6341.3162.5 mm146.6 mm
2026-05-28396.0350.5162.5 mm149.7 mm
2026-05-29411.4360.1162.5 mm150.9 mm
2026-05-30425.2369.5162.5 mm152.7 mm
2026-05-31439.4379.1163.2 mm154.3 mm
2026-06-01454.1388.5163.2 mm156.8 mm
2026-06-02464.8398.4164.9 mm158.7 mm
2026-06-03475.4408.7164.9 mm161.2 mm
2026-06-04483.9418.9179.1 mm163.7 mm
2026-06-05491.4429.2179.1 mm166.4 mm
2026-06-06501.1439.1179.1 mm169.3 mm
2026-06-07512.1449.4179.1 mm170.9 mm
2026-06-08523.5459.6179.1 mm172.6 mm
2026-06-09535.8470.5179.1 mm173.6 mm
2026-06-10545.4481.1179.1 mm175.7 mm
2026-06-11555.8491.5179.1 mm177.6 mm
2026-06-12568.9502.4179.1 mm179.2 mm
2026-06-13583.9513.6179.1 mm181.3 mm
2026-06-14598.5524.9179.1 mm183.5 mm
2026-06-15613.7536.7179.2 mm185.8 mm
2026-06-16628.0548.7179.2 mm187.9 mm
2026-06-17643.3560.7179.2 mm190.0 mm
2026-06-18658.4573.1179.2 mm190.3 mm
2026-06-19672.7585.3179.2 mm190.7 mm
2026-06-20688.2597.6179.2 mm191.3 mm
2026-06-21704.5610.2179.2 mm192.4 mm
2026-06-22722.3622.9179.2 mm194.9 mm
2026-06-23740.9635.6179.2 mm195.2 mm
2026-06-24759.7648.2179.2 mm195.5 mm
2026-06-25777.4661.4179.2 mm196.3 mm
2026-06-26795.2674.7179.2 mm196.8 mm
2026-06-27812.8688.3179.2 mm197.3 mm
2026-06-28830.3702.1179.2 mm198.2 mm
2026-06-29849.7716.1179.4 mm198.8 mm
2026-06-30869.0730.2179.4 mm199.4 mm
2026-07-01887.8743.9179.4 mm201.2 mm
2026-07-02904.8757.5179.4 mm202.8 mm
2026-07-03922.2771.1179.4 mm204.0 mm
2026-07-04940.1785.0179.4 mm205.3 mm
2026-07-05958.4799.1179.4 mm207.7 mm
2026-07-06977.4813.0179.4 mm209.0 mm
2026-07-07995.5826.7179.4 mm211.5 mm
2026-07-081013.4840.3179.4 mm212.5 mm
2026-07-091033.6853.8179.4 mm213.0 mm
2026-07-101050.9867.3179.8 mm215.2 mm
2026-07-111069.3881.0180.6 mm216.3 mm
2026-07-121086.8895.0180.6 mm217.1 mm
2026-07-131105.7909.0180.6 mm218.5 mm
2026-07-141124.8922.9180.6 mm219.7 mm
2026-07-151142.9936.8183.2 mm221.5 mm
2026-07-161159.5951.0185.4 mm222.1 mm
2026-07-171177.9965.5185.4 mm223.5 mm
2026-07-181197.0980.1185.4 mm223.9 mm
2026-07-191215.5994.7185.4 mm224.5 mm
2026-07-201232.91009.2185.4 mm225.3 mm
2026-07-211249.61023.8185.4 mm225.8 mm
2026-07-221265.71038.7185.4 mm226.4 mm
2026-07-231281.31053.8185.4 mm227.2 mm
2026-07-241298.31068.9185.4 mm227.7 mm
2026-07-251313.71083.8197.3 mm228.1 mm
2026-07-261327.91099.0197.8 mm228.6 mm
2026-07-271344.11114.3197.8 mm229.8 mm
2026-07-281361.51129.6197.8 mm231.1 mm
2026-07-291378.81144.9197.8 mm231.9 mm
2026-07-301395.91160.3198.1 mm234.2 mm
2026-07-311413.11175.4198.2 mm235.7 mm
2026-08-011431.91189.9198.2 mm236.5 mm
2026-08-021451.31204.7198.2 mm238.1 mm
2026-08-031470.51219.7198.5 mm238.9 mm
2026-08-041488.21235.0202.2 mm240.1 mm
2026-08-051507.11250.3202.2 mm240.9 mm
2026-08-061527.01265.5202.2 mm242.1 mm
2026-08-071545.51280.5202.2 mm244.4 mm
2026-08-081564.61295.2202.2 mm246.2 mm
2026-08-091583.71309.6202.2 mm249.4 mm
2026-08-101603.01323.8202.2 mm250.4 mm
2026-08-111623.01337.5202.6 mm253.1 mm
2026-08-121642.01351.5202.6 mm256.4 mm
2026-08-131661.81365.5202.6 mm257.5 mm
2026-08-141681.91379.3202.7 mm258.1 mm
2026-08-151700.91393.1203.3 mm259.0 mm
2026-08-161719.11407.0203.6 mm259.9 mm
2026-08-171736.11421.2203.6 mm261.9 mm
2026-08-181754.81435.5203.6 mm262.8 mm
2026-08-191773.51450.2203.6 mm264.5 mm
2026-08-201789.21464.5229.9 mm265.0 mm
2026-08-211801.61478.6253.6 mm265.9 mm
2026-08-221813.31492.5253.6 mm266.5 mm
2026-08-231827.61506.7253.6 mm268.4 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
160 GDDvs 115 GDD average
Total rainfall
0.3 mmvs 22.7 mm average

No unusually hot or wet period stands out in the short-range forecast.

Sun8/30 31°Cavg 28°C 18°Cavg 17°C +14 GDD 0.0 mm
Mon8/31 30°Cavg 27°C 19°Cavg 16°C +15 GDD 0.0 mm
Tue9/1 30°Cavg 27°C 20°Cavg 16°C +15 GDD 0.0 mm
Wed9/2 32°Cavg 27°C 21°Cavg 16°C +16 GDD 0.0 mm
Thu9/3 33°Cavg 27°C 22°Cavg 16°C +17 GDD 0.0 mm
Fri9/4 34°Cavg 27°C 22°Cavg 16°C +18 GDD 0.0 mm
Sat9/5 34°Cavg 27°C 20°Cavg 16°C +17 GDD 0.0 mm
Sun9/6 31°Cavg 27°C 21°Cavg 16°C +16 GDD 0.0 mm
Mon9/7 30°Cavg 26°C 21°Cavg 16°C +16 GDD 0.3 mm
Tue9/8 30°Cavg 26°C 23°Cavg 16°C +16 GDD 0.0 mm

Data and methods

Show data sources and model assumptions

Current model conditions and the 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 Rhône Valley model uses a March 15–October 31 growing season, base 10°C GDD, and an operational hot-day marker of 35°C.

The historical series uses 1 ERA5 location, 3 temperature stations, and 4 rain stations. Interpretation confidence: high. Geometry confidence: reviewed-approximate. Rules: rhone-valley-catalog-v1-2026-07.