Isle climate — normals and trends
Isle (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.0 °C and it receives 1,054 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (19.0 °C on average) and the coldest is January (3.5 °C). Rainfall peaks in May.
Isle averages 42 frost days, 7 hot days (≥ 30 °C) and 150 rainy days per year.
Isle has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 50 to 34 per year over the period.
The hottest day of the period reached 38.6 °C (on 23 July 2019) and the coldest -25.9 °C (on 16 January 1985).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
IsleNew Aquitaine
- coords
- 45.80°, 1.23°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.0°C
Average daily high
15.0°C
Average daily low
7.3°C
Annual rainfall
1,054mm
Sunshine / day
8.4h
Mean relative humidity
78%
Average peak wind
16.0km/h
Seasonal range
15.5°C
Frost days (< 0 °C)
42 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
18.0 cm
Average feels-like high
13.2 °C
Average feels-like low
4.8 °C
Average peak gust
35.0 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.38 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.6 °C
23 July 2019
Coldest day
-25.9 °C
16 January 1985
Wettest day
68 mm
4 October 2013
Windiest day
56.5 km/h
27 December 1999
Strongest gust
132.8 km/h
27 December 1999
Hottest feels-like
40.8 °C
29 July 2024
Coldest feels-like
-30.9 °C
16 January 1985
Snowiest day
16.2 cm
23 January 2007
Sunniest day
15.3 h
21 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 8.8 °C | +2.5 °C | 149 mm | +56 mm |
| Feb | 11.5 °C | +3.5 °C | 68 mm | -15 mm |
| Mar | 12.6 °C | +1.2 °C | 60 mm | -26 mm |
| Apr | 17.4 °C | +3.2 °C | 116 mm | +24 mm |
| May | 20.3 °C | +2.6 °C | 51 mm | -50 mm |
| Jun | 27.2 °C | +5.8 °C | 43 mm | -39 mm |
| Jul | 25.7 °C | +1.9 °C | 39 mm | -27 mm |
| Aug | 28.0 °C | +4.4 °C | 80 mm | +3 mm |
| Sep | 19.4 °C | -1.1 °C | 115 mm | +29 mm |
| Oct | 17.1 °C | +1.1 °C | 130 mm | +37 mm |
| Nov | 11.4 °C | +1.2 °C | 128 mm | +31 mm |
| Dec | 9.9 °C | +2.7 °C | 71 mm | -28 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Isle?
Isle has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.0 °C and it receives 1,054 mm of precipitation per year.
What is the hottest day ever recorded in Isle?
The hottest day measured in Isle between 1940 and 2025 was 23 July 2019, reaching 38.6 °C.
What is the coldest day in Isle?
The coldest day measured in Isle between 1940 and 2025 was 16 January 1985, at -25.9 °C.
Does it snow in Isle?
Yes. Isle gets on average 18.0 cm of snow per year and has around 42 frost days.
Has the climate of Isle warmed?
Yes: Isle warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Isle?
The wettest day measured in Isle between 1940 and 2025 was 4 October 2013, with 68 mm of rain in 24 hours.
What was the windiest day in Isle?
The windiest day measured in Isle between 1940 and 2025 was 27 December 1999, with winds reaching 56.5 km/h.
What is the warmest month in Isle?
The warmest month in Isle is July (19.0 °C on average); the coldest is January (3.5 °C).
How much does it rain in Isle?
Isle receives on average 1,054 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Isle?
Isle gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Isle?
The heaviest 24-hour snowfall measured in Isle between 1940 and 2025 was 23 January 2007, with 16.2 cm.
Are there tropical nights in Isle?
Yes: Isle has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Isle?
In Isle, between 1940 and 2025, the highest apparent temperature reached 40.8 °C on 29 July 2024, and the lowest was -30.9 °C on 16 January 1985.
Compare Isle with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Isle