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France · Multi-region weather view

Loire Valley

Loire vineyards from the central valley east to Sancerre.

The Atlantic's influence fades inland, but spring frost and late-season rain remain concerns across the area.

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

Current conditions

Observations through Aug 30, 2026 · 06:00 UTC

Temperature17.3°C
Dew Point16.8°C
Relative Humidity97%
24h Rainfall3.0 mmmodeled IFS total through Aug 29

Vintage explorer

Compare this vintage →

Moderately cooler and significantly wetter than normal.

Mean temperature15.7°C
Temperature anomaly-0.6°Cvs 1991-2020
Growing degree days1266base 10°C
Hot days6≥ 32°C

What stood out in 1998

Frequent rain can mean more canopy growth and more disease pressure. Rain close to harvest can raise rot pressure and shorten the picking window. A freeze after budbreak can damage new growth and reduce the crop.

Wetter than baseline · Moderate confidence

Growing-season precipitation was 101 mm above the 1991–2020 baseline.

Frequent rain can mean more canopy growth and more disease pressure.

More harvest rain than usual · High confidence

Harvest-window precipitation totaled 202 mm, +71 mm versus baseline.

Rain close to harvest can raise rot pressure and shorten the picking window.

Spring freeze recorded · Moderate confidence

The regional record had 1 spring day(s) at or below -2°C.

A freeze after budbreak can damage new growth and reduce the crop.

How unusual was 1998?

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 15.7°C

Growing-season rainfall

4th wettest of 35 vintages Wetter than 31 of 34 other vintages 511.4 mm

Heat accumulation

7th lowest of 35 vintages Lower than 28 of 34 other vintages 1267 GDD

Hot days

13th most of 35 vintages More than 21 of 34 other vintages 6 days

1998 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 watch

    Heat accumulation

    1998 0 GDD
    Typical 22 GDD

    Rainfall

    1998 28.8 mm
    Typical 54.4 mm
    1998 freezing days
    3
    Typical
    3.4

    Heat accumulation ran behind the typical month.

  2. 1–30
    Frost watchGrowing season

    Heat accumulation

    1998 31 GDD
    Typical 57 GDD

    Rainfall

    1998 180.4 mm
    Typical 58.3 mm
    1998 freezing days
    0
    Typical
    0.5

    Heat accumulation ran behind the typical month.

  3. 1–31
    Frost watchGrowing season

    Heat accumulation

    1998 176 GDD
    Typical 146 GDD

    Rainfall

    1998 26.5 mm
    Typical 67.0 mm
    1998 freezing days
    0
    Typical
    0.0

    Heat accumulation ran ahead of the typical month.

  4. 1–30
    Growing season

    Heat accumulation

    1998 215 GDD
    Typical 241 GDD

    Rainfall

    1998 41.2 mm
    Typical 54.2 mm

    Close to the typical monthly pattern.

  5. 1–31
    Growing season

    Heat accumulation

    1998 260 GDD
    Typical 312 GDD

    Rainfall

    1998 40.1 mm
    Typical 50.5 mm

    Close to the typical monthly pattern.

  6. 1–31
    Growing season

    Heat accumulation

    1998 308 GDD
    Typical 312 GDD

    Rainfall

    1998 21.7 mm
    Typical 49.2 mm

    Drier than the typical month.

  7. 1–30
    Growing seasonHarvest window

    Heat accumulation

    1998 203 GDD
    Typical 204 GDD

    Rainfall

    1998 104.4 mm
    Typical 55.4 mm

    Wetter than the typical month.

  8. 1–31
    Growing seasonHarvest window

    Heat accumulation

    1998 73 GDD
    Typical 108 GDD

    Rainfall

    1998 97.1 mm
    Typical 75.6 mm

    Heat accumulation ran behind the typical month.

View milestone calendar data as a table
Month1998 GDDTypical GDD1998 rainfallTypical rainfall1998 freezing daysTypical freezing days
March 1998 0 GDD 22 GDD 28.8 mm 54.4 mm 33.4
April 1998 31 GDD 57 GDD 180.4 mm 58.3 mm 00.5
May 1998 176 GDD 146 GDD 26.5 mm 67.0 mm 00.0
June 1998 215 GDD 241 GDD 41.2 mm 54.2 mm Outside frost windowOutside frost window
July 1998 260 GDD 312 GDD 40.1 mm 50.5 mm Outside frost windowOutside frost window
August 1998 308 GDD 312 GDD 21.7 mm 49.2 mm Outside frost windowOutside frost window
September 1998 203 GDD 204 GDD 104.4 mm 55.4 mm Outside frost windowOutside frost window
October 1998 73 GDD 108 GDD 97.1 mm 75.6 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 1998 growing season

214 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

    1994

    Most alike in Growing-season precipitation and Harvest precipitation.

    Growing-season precipitation
    less rain: 11.4 mm
    Harvest precipitation
    less rain: 7.4 mm

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

    View 1994 →

  2. Second closest

    2012

    Most alike in Harvest precipitation and Hot-day count.

    Harvest precipitation
    more rain: 5.8 mm
    Hot-day count
    fewer hot days: 1 day

    Largest difference: Growing-season precipitation — more rain

    View 2012 →

  3. Third closest

    2000

    Most alike in Spring frost exposure and Growing-season precipitation.

    Spring frost exposure
    more frost-exposure days: 1 day
    Growing-season precipitation
    less rain: 17.2 mm

    Largest difference: Harvest precipitation — less rain

    View 2000 →
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 0.323; 2012 0.336; 2000 0.503.

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. +4.4°C −4.4°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. +290 mm −290 mm 1991 2000 2010 2020 2026
View historical chart data as a table
YearTemperature anomalyRainfall anomalyHot days
1991-0.8°C-75 mm2
1992-0.8°C+21 mm5
1993-1.2°C+90 mm1
1994-0.3°C+90 mm4
1995+0.1°C-86 mm9
1996-1.0°C-138 mm1
1997+0.1°C-24 mm1
1998-0.6°C+101 mm6
1999+0.3°C+170 mm1
2000-0.2°C+84 mm2
2001-0.2°C+93 mm3
2002-0.7°C+14 mm1
2003+1.0°C-34 mm17
2004-0.1°C-17 mm3
2005+0.7°C-100 mm13
2006+1.0°C+21 mm11
2007-0.4°C+45 mm1
2008-0.9°C+41 mm0
2009+0.2°C-54 mm4
2010-0.3°C-88 mm2
2011+0.5°C-87 mm2
2012-0.4°C+152 mm5
2013-0.1°C+45 mm4
2014+0.3°C+33 mm1
2015+0.1°C-13 mm6
2016-0.1°C-79 mm8
2017+0.6°C-63 mm11
2018+1.5°C-74 mm10
2019+0.8°C-43 mm13
2020+1.0°C-24 mm11
2021-0.2°C+33 mm1
2022+2.1°C-56 mm20
2023+1.8°C-1 mm13
2024+0.3°C+162 mm4
2025+1.3°C-92 mm14
2026+4.2°C-281 mm42

winter

6.2°C

+0.6°C vs baseline

197 mm rain · -7 mm

spring

11.4°C

-0.1°C vs baseline

235 mm rain · +56 mm

summer

18.5°C

-0.9°C vs baseline

103 mm rain · -51 mm

harvest

14.5°C

-0.4°C vs baseline

201 mm rain · +71 mm

Weather events

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

  1. Spring frost exposure

    Minimum temperature
    -2.6°C
    Duration
    1 day
    Severe-freeze days
    1 day

    The regional model recorded freezing temperatures during spring.

  2. Spring frost exposure

    Minimum temperature
    -0.3°C
    Duration
    1 day
    Severe-freeze days
    0 days

    The regional model recorded freezing temperatures during spring.

  3. Spring frost exposure

    Minimum temperature
    -1.9°C
    Duration
    1 day
    Severe-freeze days
    0 days

    The regional model recorded freezing temperatures during spring.

  4. Dry spell

    Duration
    22 days
    Total rain
    1.7 mm
    Daily cutoff
    1.0 mm/day

  5. Dry spell

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

  6. Dry spell

    Duration
    16 days
    Total rain
    0.4 mm
    Daily cutoff
    1.0 mm/day

  7. Heat episode

    Peak temperature
    36.5°C
    Duration
    4 days
    Heat accumulation
    64 GDD

  8. Concentrated harvest rain

    Total rain
    23.9 mm
    Highest 3-day total
    23.9 mm
    Trigger threshold
    23.5 mm

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

  9. Concentrated harvest rain

    Total rain
    27.3 mm
    Highest 3-day total
    27.1 mm
    Trigger threshold
    23.5 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 loire-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 +99.5 GDD per decade. The 95% interval is +71.9 to +127.2 GDD per decade, based on 35 eligible vintages.

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.

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
19911249 GDD-131 GDD
19921239 GDD-140 GDD
19931134 GDD-245 GDD
19941329 GDD-50 GDD
19951398 GDD+19 GDD
19961169 GDD-211 GDD
19971409 GDD+30 GDD
19981267 GDD-113 GDD
19991420 GDD+41 GDD
20001313 GDD-66 GDD
20011341 GDD-39 GDD
20021211 GDD-169 GDD
20031629 GDD+249 GDD
20041352 GDD-28 GDD
20051518 GDD+139 GDD
20061592 GDD+212 GDD
20071284 GDD-96 GDD
20081216 GDD-163 GDD
20091405 GDD+26 GDD
20101318 GDD-61 GDD
20111461 GDD+81 GDD
20121300 GDD-79 GDD
20131371 GDD-8 GDD
20141410 GDD+30 GDD
20151391 GDD+11 GDD
20161355 GDD-24 GDD
20171501 GDD+121 GDD
20181689 GDD+309 GDD
20191540 GDD+161 GDD
20201572 GDD+192 GDD
20211353 GDD-26 GDD
20221823 GDD+444 GDD
20231734 GDD+355 GDD
20241417 GDD+38 GDD
20251622 GDD+243 GDD
Growing-season mean temperature
+0.52 °C per decade 95% interval +0.39 to +0.66
Growing degree days
+99.55 GDD per decade 95% interval +71.92 to +127.17
Growing-season precipitation
-10.45 mm per decade 95% interval -34.96 to +14.07
Hot days
+2.34 days per decade 95% interval +1.24 to +3.43
Spring frost days
-0.23 days per decade 95% interval -1.08 to +0.62
Longest dry spell
+1.43 days per decade 95% interval -0.44 to +3.30

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+1.0°C+0.5 to +1.5°C25
2041-2060+1.5°C+0.9 to +2.6°C25
2061-2075+1.8°C+1.3 to +3.3°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 25°C 24°C 23°C 25°C 26°C 30°C 29°C 34°C 26°C 23°C
Low 17°C 16°C 13°C 13°C 14°C 16°C 17°C 19°C 20°C 16°C
Rain 3.6 mm 1.7 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.0 mm 0.6 mm 0.1 mm 0.0 mm

Across the typical year: Late July has the warmest median afternoon high (26.1°C); Late January has the coolest (8.3°C). Wet days are most frequent in Early November (56%) and least frequent in Late July (30%). 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 Loire 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. -5°C5°C15°C25°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 Loire 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.

Loire 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 1–159.4°C (5.9–11.3°C)3.7°C (-0.2–6.3°C)48%33.4 mm (15.5–58.3 mm)
Jan 16–318.3°C (5.4–10.6°C)2.1°C (-0.7–5.1°C)44%28.3 mm (15.9–40.2 mm)
Feb 1–159.6°C (6.3–11.6°C)1.7°C (-0.9–5.2°C)48%35.7 mm (18.8–40.9 mm)
Feb 16–2910.4°C (8.0–12.5°C)2.7°C (0.0–5.6°C)42%27.3 mm (10.1–35.4 mm)
Mar 1–1512.2°C (9.9–14.6°C)3.9°C (1.2–6.2°C)39%24.3 mm (12.0–41.5 mm)
Mar 16–3113.4°C (11.3–16.2°C)4.9°C (2.3–7.2°C)40%24.3 mm (11.6–39.2 mm)
Apr 1–1514.7°C (12.6–17.2°C)5.4°C (3.4–7.5°C)40%18.3 mm (7.2–31.8 mm)
Apr 16–3016.2°C (14.1–19.7°C)7.4°C (4.7–9.2°C)46%31.6 mm (14.9–44.6 mm)
May 1–1517.9°C (15.8–21.2°C)8.8°C (6.5–11.2°C)46%30.8 mm (24.1–36.0 mm)
May 16–3120.2°C (17.7–23.7°C)10.7°C (8.6–12.3°C)44%35.5 mm (17.2–44.5 mm)
Jun 1–1521.5°C (19.2–24.9°C)12.0°C (10.2–14.2°C)47%33.7 mm (20.1–47.5 mm)
Jun 16–3023.8°C (21.3–27.3°C)13.4°C (11.5–15.3°C)31%16.2 mm (7.8–26.4 mm)
Jul 1–1524.3°C (21.6–27.7°C)14.1°C (12.3–15.9°C)38%27.0 mm (16.0–35.1 mm)
Jul 16–3126.1°C (23.5–28.9°C)15.0°C (13.3–16.5°C)30%20.7 mm (12.1–35.1 mm)
Aug 1–1525.3°C (23.3–28.6°C)14.7°C (12.7–16.6°C)34%19.2 mm (10.0–37.3 mm)
Aug 16–3124.6°C (22.3–28.0°C)14.3°C (12.4–15.9°C)34%20.7 mm (12.6–35.8 mm)
Sep 1–1522.4°C (20.4–25.5°C)12.1°C (10.4–14.4°C)31%20.4 mm (7.0–39.9 mm)
Sep 16–3020.3°C (18.5–23.2°C)10.8°C (8.5–12.9°C)40%24.5 mm (14.3–42.2 mm)
Oct 1–1518.1°C (16.1–20.3°C)10.5°C (8.0–12.6°C)49%34.5 mm (21.0–51.0 mm)
Oct 16–3116.0°C (13.6–18.4°C)8.3°C (5.3–11.1°C)47%39.6 mm (19.5–51.8 mm)
Nov 1–1513.1°C (11.3–14.9°C)6.4°C (3.8–8.7°C)56%44.0 mm (24.4–64.1 mm)
Nov 16–3010.8°C (8.0–12.9°C)4.6°C (1.6–7.3°C)48%24.9 mm (16.3–46.7 mm)
Dec 1–158.9°C (6.3–11.7°C)2.8°C (-0.1–5.9°C)47%34.2 mm (20.1–52.4 mm)
Dec 16–319.3°C (5.7–11.5°C)2.9°C (-0.4–6.3°C)51%46.5 mm (25.1–62.0 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

Apr 1–Aug 30, 2026

Growing degree days1514.4base 10°C
Growing-season rainfall129.6 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. 1514 GDD 0 Apr ’26MayJunJulAug
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. 266 mm 0 Apr ’26MayJunJulAug
View growing-season accumulation data
DateSeason GDD1991–2020 average GDDSeason rainfall1991–2020 average rainfall
2026-04-010.01.31.0 mm1.2 mm
2026-04-021.33.01.2 mm3.1 mm
2026-04-031.34.32.0 mm5.8 mm
2026-04-046.35.12.0 mm8.1 mm
2026-04-059.45.72.3 mm9.2 mm
2026-04-0613.76.82.3 mm10.7 mm
2026-04-0722.18.22.3 mm12.3 mm
2026-04-0830.59.32.3 mm13.5 mm
2026-04-0938.310.82.3 mm15.0 mm
2026-04-1041.712.32.3 mm16.9 mm
2026-04-1143.413.75.4 mm18.4 mm
2026-04-1243.415.06.9 mm19.7 mm
2026-04-1343.416.37.4 mm21.2 mm
2026-04-1443.417.87.6 mm23.1 mm
2026-04-1546.719.58.0 mm24.6 mm
2026-04-1650.721.28.0 mm25.7 mm
2026-04-1756.422.88.0 mm27.2 mm
2026-04-1861.224.88.0 mm28.8 mm
2026-04-1963.026.58.0 mm30.6 mm
2026-04-2066.029.08.0 mm32.0 mm
2026-04-2168.232.08.0 mm33.3 mm
2026-04-2271.635.28.1 mm35.4 mm
2026-04-2377.038.28.1 mm37.2 mm
2026-04-2483.241.18.1 mm39.5 mm
2026-04-2589.244.18.1 mm42.1 mm
2026-04-2695.446.78.1 mm44.9 mm
2026-04-27100.849.18.1 mm47.5 mm
2026-04-28105.351.68.1 mm50.5 mm
2026-04-29112.654.08.5 mm53.5 mm
2026-04-30121.256.69.5 mm58.3 mm
2026-05-01129.059.512.1 mm62.0 mm
2026-05-02135.362.719.4 mm64.8 mm
2026-05-03141.666.030.3 mm66.2 mm
2026-05-04146.269.337.9 mm68.0 mm
2026-05-05150.172.648.0 mm70.4 mm
2026-05-06152.876.252.1 mm72.0 mm
2026-05-07156.180.452.2 mm73.8 mm
2026-05-08161.684.653.4 mm76.0 mm
2026-05-09169.288.757.0 mm77.5 mm
2026-05-10175.593.369.9 mm79.8 mm
2026-05-11178.497.772.6 mm82.8 mm
2026-05-12180.3101.572.8 mm84.7 mm
2026-05-13182.5105.574.3 mm87.0 mm
2026-05-14182.5109.478.0 mm88.7 mm
2026-05-15182.5113.278.5 mm89.8 mm
2026-05-16183.1117.879.4 mm91.8 mm
2026-05-17186.6122.783.1 mm94.3 mm
2026-05-18189.2127.184.7 mm97.3 mm
2026-05-19193.7131.386.8 mm99.7 mm
2026-05-20200.2135.986.9 mm102.6 mm
2026-05-21208.0141.286.9 mm105.2 mm
2026-05-22219.2146.686.9 mm106.8 mm
2026-05-23231.6152.186.9 mm107.9 mm
2026-05-24245.4158.186.9 mm109.7 mm
2026-05-25261.0164.586.9 mm111.8 mm
2026-05-26277.4170.886.9 mm114.3 mm
2026-05-27293.0177.087.0 mm117.0 mm
2026-05-28307.9183.387.3 mm118.7 mm
2026-05-29323.0189.687.3 mm120.8 mm
2026-05-30337.5196.587.5 mm123.1 mm
2026-05-31347.8202.987.7 mm125.3 mm
2026-06-01357.5209.689.6 mm126.6 mm
2026-06-02366.1216.892.1 mm128.3 mm
2026-06-03372.9223.694.5 mm130.4 mm
2026-06-04379.9230.196.9 mm133.5 mm
2026-06-05384.4236.797.6 mm136.9 mm
2026-06-06390.8243.998.1 mm138.9 mm
2026-06-07397.0251.298.1 mm140.9 mm
2026-06-08404.7258.598.8 mm143.0 mm
2026-06-09409.4265.898.9 mm144.7 mm
2026-06-10415.0273.299.1 mm147.9 mm
2026-06-11420.4280.099.1 mm151.7 mm
2026-06-12429.9286.899.1 mm153.5 mm
2026-06-13441.7293.999.1 mm154.8 mm
2026-06-14454.5301.599.1 mm157.6 mm
2026-06-15467.7309.399.1 mm159.4 mm
2026-06-16480.1317.299.2 mm160.8 mm
2026-06-17493.6325.599.2 mm162.8 mm
2026-06-18510.2334.1100.0 mm163.9 mm
2026-06-19526.1342.7100.1 mm165.2 mm
2026-06-20541.5351.0100.5 mm166.5 mm
2026-06-21560.7359.6100.5 mm167.7 mm
2026-06-22582.6368.0100.5 mm169.2 mm
2026-06-23605.1376.6101.0 mm170.2 mm
2026-06-24627.1385.7101.1 mm171.2 mm
2026-06-25649.6394.8101.6 mm172.8 mm
2026-06-26669.1404.7101.6 mm173.8 mm
2026-06-27687.6414.7102.7 mm174.7 mm
2026-06-28701.4424.6103.9 mm176.0 mm
2026-06-29714.1434.2104.2 mm177.7 mm
2026-06-30727.5443.6104.2 mm179.5 mm
2026-07-01738.5453.5104.2 mm181.7 mm
2026-07-02749.1463.0104.2 mm184.4 mm
2026-07-03761.8472.6104.2 mm186.0 mm
2026-07-04774.6481.9104.2 mm189.0 mm
2026-07-05788.8491.0104.2 mm191.9 mm
2026-07-06805.2499.7104.2 mm193.2 mm
2026-07-07822.8508.5104.2 mm194.8 mm
2026-07-08840.0517.9104.2 mm195.7 mm
2026-07-09858.0527.4104.2 mm197.6 mm
2026-07-10877.5537.0104.2 mm199.1 mm
2026-07-11896.8546.4104.4 mm200.7 mm
2026-07-12917.5555.6104.4 mm202.3 mm
2026-07-13937.2565.0105.2 mm204.5 mm
2026-07-14955.3574.5105.2 mm205.8 mm
2026-07-15973.0584.6110.6 mm206.8 mm
2026-07-16988.7595.3113.1 mm207.7 mm
2026-07-171002.7605.8114.7 mm209.3 mm
2026-07-181016.3616.4114.7 mm210.7 mm
2026-07-191028.3627.4114.7 mm212.5 mm
2026-07-201038.8638.2114.7 mm213.8 mm
2026-07-211050.2648.6114.7 mm214.8 mm
2026-07-221062.1658.9114.7 mm215.9 mm
2026-07-231074.4669.8114.7 mm218.0 mm
2026-07-241087.7680.6114.7 mm218.9 mm
2026-07-251102.2691.3114.7 mm220.1 mm
2026-07-261112.7702.5114.9 mm221.8 mm
2026-07-271124.7713.6114.9 mm223.9 mm
2026-07-281139.6724.1114.9 mm225.5 mm
2026-07-291156.5734.6115.4 mm226.4 mm
2026-07-301170.4745.1117.2 mm228.3 mm
2026-07-311183.8755.5118.0 mm230.0 mm
2026-08-011195.6766.2118.1 mm231.0 mm
2026-08-021210.1776.9118.1 mm232.3 mm
2026-08-031225.3787.8118.6 mm233.1 mm
2026-08-041239.6798.5123.8 mm234.1 mm
2026-08-051253.0809.5123.9 mm235.4 mm
2026-08-061264.0820.4123.9 mm238.2 mm
2026-08-071274.5831.6123.9 mm240.3 mm
2026-08-081287.8842.4123.9 mm242.7 mm
2026-08-091305.6852.7124.0 mm245.3 mm
2026-08-101322.1862.7124.0 mm247.3 mm
2026-08-111340.3872.8124.0 mm248.8 mm
2026-08-121359.6883.1124.0 mm250.6 mm
2026-08-131380.0892.8124.0 mm252.0 mm
2026-08-141400.0902.8124.5 mm253.5 mm
2026-08-151416.7913.0125.5 mm254.6 mm
2026-08-161433.8923.0127.7 mm255.3 mm
2026-08-171449.6933.2127.7 mm256.7 mm
2026-08-181463.0943.6127.7 mm258.4 mm
2026-08-191476.6953.7128.5 mm260.0 mm
2026-08-201486.9963.7129.0 mm261.8 mm
2026-08-211496.1973.8129.5 mm262.6 mm
2026-08-221503.4984.1129.5 mm264.3 mm
2026-08-231514.4994.3129.6 mm265.8 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
111 GDDvs 81 GDD average
Total rainfall
6.0 mmvs 13.8 mm average

The forecast includes a period of potentially stressful heat. The region's 32°C heat threshold is reached Sep 6.

Sun8/30 25°Cavg 24°C 17°Cavg 13°C +10 GDD 3.6 mm
Mon8/31 24°Cavg 24°C 16°Cavg 13°C +10 GDD 1.7 mm
Tue9/1 23°Cavg 23°C 13°Cavg 12°C +8 GDD 0.0 mm
Wed9/2 25°Cavg 24°C 13°Cavg 12°C +9 GDD 0.0 mm
Thu9/3 26°Cavg 24°C 14°Cavg 13°C +10 GDD 0.0 mm
Fri9/4 30°Cavg 24°C 16°Cavg 13°C +13 GDD 0.0 mm
Sat9/5 29°Cavg 24°C 17°Cavg 13°C +13 GDD 0.0 mm
Sun9/6 34°Cavg 23°C 19°Cavg 13°C +17 GDD 0.6 mm
Mon9/7 26°Cavg 23°C 20°Cavg 13°C +13 GDD 0.1 mm
Tue9/8 23°Cavg 23°C 16°Cavg 12°C +10 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 Loire Valley model uses a April 1–October 31 growing season, base 10°C GDD, and an operational hot-day marker of 32°C.

The historical series uses 2 ERA5 locations, 5 temperature stations, and 7 rain stations. Interpretation confidence: high. Geometry confidence: reviewed-approximate. Rules: loire-valley-catalog-v1-2026-07.