Brest climate — normals and trends
Brest (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 11.8 °C and it receives 845 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 August (16.6 °C on average) and the coldest is February (7.5 °C). Rainfall peaks in December.
Brest averages 3 frost days, 0 hot days (≥ 30 °C) and 153 rainy days per year.
Brest has warmed by +0.9 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The number of frost days there went from about 5 to 1 per year over the period.
The hottest day of the period reached 34.2 °C (on 18 July 2022) and the coldest -6.6 °C (on 13 January 1987).
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
BrestBrittany Region
- coords
- 48.39°, -4.49°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.8°C
Average daily high
13.8°C
Average daily low
9.9°C
Annual rainfall
845mm
Sunshine / day
9.0h
Mean relative humidity
82%
Average peak wind
26.4km/h
Seasonal range
9.1°C
Frost days (< 0 °C)
3 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
153 d/yr
Annual snowfall
2.3 cm
Average feels-like high
11.3 °C
Average feels-like low
6.5 °C
Average peak gust
45.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
13.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.26 · 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
-6.6 °C
13 January 1987
Wettest day
52 mm
24 October 2011
Windiest day
83.5 km/h
2 November 2023
Strongest gust
138.2 km/h
2 November 2023
Hottest feels-like
33.3 °C
18 July 2022
Coldest feels-like
-14.9 °C
13 January 1987
Snowiest day
8.0 cm
19 February 1963
Sunniest day
15.4 h
13 June 2014
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 | 9.9 °C | +0.7 °C | 164 mm | +69 mm |
| Feb | 10.3 °C | +1.1 °C | 65 mm | -15 mm |
| Mar | 12.0 °C | +1.4 °C | 32 mm | -39 mm |
| Apr | 15.3 °C | +3.2 °C | 84 mm | +24 mm |
| May | 16.2 °C | +1.6 °C | 60 mm | -0 mm |
| Jun | 19.5 °C | +2.5 °C | 47 mm | +1 mm |
| Jul | 20.0 °C | +1.3 °C | 37 mm | -6 mm |
| Aug | 20.9 °C | +2.0 °C | 33 mm | -17 mm |
| Sep | 17.3 °C | -0.3 °C | 79 mm | +21 mm |
| Oct | 15.9 °C | +0.8 °C | 82 mm | +1 mm |
| Nov | 13.5 °C | +1.5 °C | 115 mm | +16 mm |
| Dec | 11.2 °C | +1.0 °C | 154 mm | +51 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 Brest?
Brest has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 11.8 °C and it receives 845 mm of precipitation per year.
What is the hottest day ever recorded in Brest?
The hottest day measured in Brest between 1940 and 2025 was 18 July 2022, reaching 34.2 °C.
What is the coldest day in Brest?
The coldest day measured in Brest between 1940 and 2025 was 13 January 1987, at -6.6 °C.
Does it snow in Brest?
Yes. Brest gets on average 2.3 cm of snow per year and has around 3 frost days.
Has the climate of Brest warmed?
Yes: Brest warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Brest?
The wettest day measured in Brest between 1940 and 2025 was 24 October 2011, with 52 mm of rain in 24 hours.
What was the windiest day in Brest?
The windiest day measured in Brest between 1940 and 2025 was 2 November 2023, with winds reaching 83.5 km/h.
What is the warmest month in Brest?
The warmest month in Brest is August (16.6 °C on average); the coldest is February (7.5 °C).
How much does it rain in Brest?
Brest receives on average 845 mm of precipitation per year, spread over about 153 rainy days.
Is it sunny in Brest?
Brest 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 Brest?
The heaviest 24-hour snowfall measured in Brest between 1940 and 2025 was 19 February 1963, with 8.0 cm.
Are there tropical nights in Brest?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Brest.
What was the most extreme apparent temperature in Brest?
In Brest, between 1940 and 2025, the highest apparent temperature reached 33.3 °C on 18 July 2022, and the lowest was -14.9 °C on 13 January 1987.
Compare Brest with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Brest