Séné climate — normals and trends
Séné (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 12.3 °C and it receives 725 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 (18.1 °C on average) and the coldest is January (6.8 °C). Rainfall peaks in December.
Séné averages 8 frost days, 0 hot days (≥ 30 °C) and 125 rainy days per year.
Séné has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The number of frost days there went from about 13 to 3 per year over the period.
The hottest day of the period reached 34.2 °C (on 18 July 2022) and the coldest -9.8 °C (on 20 January 1963).
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
SénéBrittany Region
- coords
- 47.62°, -2.74°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.3°C
Average daily high
14.5°C
Average daily low
10.2°C
Annual rainfall
725mm
Sunshine / day
9.0h
Mean relative humidity
81%
Average peak wind
24.7km/h
Seasonal range
11.3°C
Frost days (< 0 °C)
8 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
2.1 cm
Average feels-like high
12.4 °C
Average feels-like low
7.2 °C
Average peak gust
40.2 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
13.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.32 · 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
34.2 °C
18 July 2022
Coldest day
-9.8 °C
20 January 1963
Wettest day
48 mm
2 July 2018
Windiest day
80.8 km/h
26 December 1999
Strongest gust
133.9 km/h
26 December 1999
Hottest feels-like
36.7 °C
9 August 2003
Coldest feels-like
-17.5 °C
13 January 1987
Snowiest day
8.6 cm
7 February 1986
Sunniest day
15.5 h
19 June 1949
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 | 8.9 °C | +0.4 °C | 210 mm | +131 mm |
| Feb | 9.5 °C | +0.6 °C | 44 mm | -19 mm |
| Mar | 12.5 °C | +1.6 °C | 36 mm | -23 mm |
| Apr | 16.3 °C | +3.1 °C | 65 mm | +14 mm |
| May | 18.2 °C | +2.2 °C | 45 mm | -11 mm |
| Jun | 22.1 °C | +3.2 °C | 41 mm | -1 mm |
| Jul | 22.1 °C | +1.5 °C | 105 mm | +68 mm |
| Aug | 22.9 °C | +2.3 °C | 26 mm | -14 mm |
| Sep | 18.6 °C | -0.4 °C | 44 mm | -6 mm |
| Oct | 17.0 °C | +1.2 °C | 62 mm | -15 mm |
| Nov | 13.7 °C | +1.8 °C | 89 mm | +5 mm |
| Dec | 10.6 °C | +1.0 °C | 103 mm | +15 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 Séné?
Séné has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 12.3 °C and it receives 725 mm of precipitation per year.
What is the hottest day ever recorded in Séné?
The hottest day measured in Séné between 1940 and 2025 was 18 July 2022, reaching 34.2 °C.
What is the coldest day in Séné?
The coldest day measured in Séné between 1940 and 2025 was 20 January 1963, at -9.8 °C.
Does it snow in Séné?
Yes. Séné gets on average 2.1 cm of snow per year and has around 8 frost days.
Has the climate of Séné warmed?
Yes: Séné warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Séné?
The wettest day measured in Séné between 1940 and 2025 was 2 July 2018, with 48 mm of rain in 24 hours.
What was the windiest day in Séné?
The windiest day measured in Séné between 1940 and 2025 was 26 December 1999, with winds reaching 80.8 km/h.
What is the warmest month in Séné?
The warmest month in Séné is July (18.1 °C on average); the coldest is January (6.8 °C).
How much does it rain in Séné?
Séné receives on average 725 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Séné?
Séné gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Séné?
The heaviest 24-hour snowfall measured in Séné between 1940 and 2025 was 7 February 1986, with 8.6 cm.
Are there tropical nights in Séné?
Yes: Séné has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Séné?
In Séné, between 1940 and 2025, the highest apparent temperature reached 36.7 °C on 9 August 2003, and the lowest was -17.5 °C on 13 January 1987.
Compare Séné with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Séné