Clisson climate — normals and trends
Clisson (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.8 °C and it receives 720 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 (19.1 °C on average) and the coldest is January (5.1 °C). Rainfall peaks in December.
Clisson averages 32 frost days, 6 hot days (≥ 30 °C) and 123 rainy days per year.
Clisson has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 40 to 24 per year over the period.
The hottest day of the period reached 41.4 °C (on 18 July 2022) and the coldest -16.8 °C (on 10 February 1986).
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
ClissonPays de la Loire Region
- coords
- 47.09°, -1.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.8°C
Average daily high
15.7°C
Average daily low
8.1°C
Annual rainfall
720mm
Sunshine / day
8.7h
Mean relative humidity
79%
Average peak wind
19.7km/h
Seasonal range
14.0°C
Frost days (< 0 °C)
32 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
4.1 cm
Average feels-like high
13.7 °C
Average feels-like low
5.6 °C
Average peak gust
38.4 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
41.4 °C
18 July 2022
Coldest day
-16.8 °C
10 February 1986
Wettest day
78 mm
9 October 2024
Windiest day
62.8 km/h
26 December 1999
Strongest gust
130.0 km/h
26 December 1999
Hottest feels-like
40.8 °C
10 August 2003
Coldest feels-like
-22.4 °C
10 February 1986
Snowiest day
11.9 cm
26 January 1945
Sunniest day
15.6 h
22 June 2018
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 | 8.7 °C | +0.9 °C | 171 mm | +100 mm |
| Feb | 10.1 °C | +1.0 °C | 55 mm | -7 mm |
| Mar | 13.6 °C | +1.6 °C | 43 mm | -17 mm |
| Apr | 18.0 °C | +3.3 °C | 83 mm | +26 mm |
| May | 20.7 °C | +2.6 °C | 26 mm | -43 mm |
| Jun | 27.0 °C | +5.4 °C | 24 mm | -25 mm |
| Jul | 26.2 °C | +2.4 °C | 43 mm | +3 mm |
| Aug | 27.7 °C | +4.0 °C | 26 mm | -19 mm |
| Sep | 20.8 °C | -0.4 °C | 37 mm | -15 mm |
| Oct | 17.9 °C | +1.1 °C | 57 mm | -11 mm |
| Nov | 13.7 °C | +2.1 °C | 59 mm | -13 mm |
| Dec | 9.9 °C | +1.3 °C | 64 mm | -11 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 Clisson?
Clisson has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.8 °C and it receives 720 mm of precipitation per year.
What is the hottest day ever recorded in Clisson?
The hottest day measured in Clisson between 1940 and 2025 was 18 July 2022, reaching 41.4 °C.
What is the coldest day in Clisson?
The coldest day measured in Clisson between 1940 and 2025 was 10 February 1986, at -16.8 °C.
Does it snow in Clisson?
Yes. Clisson gets on average 4.1 cm of snow per year and has around 32 frost days.
Has the climate of Clisson warmed?
Yes: Clisson warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Clisson?
The wettest day measured in Clisson between 1940 and 2025 was 9 October 2024, with 78 mm of rain in 24 hours.
What was the windiest day in Clisson?
The windiest day measured in Clisson between 1940 and 2025 was 26 December 1999, with winds reaching 62.8 km/h.
What is the warmest month in Clisson?
The warmest month in Clisson is July (19.1 °C on average); the coldest is January (5.1 °C).
How much does it rain in Clisson?
Clisson receives on average 720 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Clisson?
Clisson gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Clisson?
The heaviest 24-hour snowfall measured in Clisson between 1940 and 2025 was 26 January 1945, with 11.9 cm.
Are there tropical nights in Clisson?
Yes: Clisson has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Clisson?
In Clisson, between 1940 and 2025, the highest apparent temperature reached 40.8 °C on 10 August 2003, and the lowest was -22.4 °C on 10 February 1986.
Compare Clisson with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Clisson