St-Malo climate — normals and trends
St-Malo (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 12.0 °C and it receives 907 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 (17.5 °C on average) and the coldest is February (7.1 °C). Rainfall peaks in November.
St-Malo averages 2 frost days, 0 hot days (≥ 30 °C) and 151 rainy days per year.
St-Malo has warmed by +1.1 °C between 1940 and 2025, or +0.13 °C per decade. This trend is statistically significant.
The number of frost days there went from about 4 to 0 per year over the period.
The hottest day of the period reached 30.6 °C (on 28 July 1947) and the coldest -6.0 °C (on 17 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
St-MaloBrittany Region
- coords
- 48.65°, -2.01°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
12.0°C
Average daily high
13.3°C
Average daily low
10.9°C
Annual rainfall
907mm
Sunshine / day
8.6h
Mean relative humidity
81%
Average peak wind
31.3km/h
Seasonal range
10.4°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
151 d/yr
Annual snowfall
4.1 cm
Average feels-like high
10.5 °C
Average feels-like low
6.7 °C
Average peak gust
42.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.1 °C
since 1940
+0.1 °C per decade · r² = 0.31 · 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
30.6 °C
28 July 1947
Coldest day
-6.0 °C
17 January 1985
Wettest day
50 mm
13 November 2010
Windiest day
88.0 km/h
2 November 2023
Strongest gust
129.6 km/h
28 December 1979
Hottest feels-like
30.6 °C
28 July 1947
Coldest feels-like
-15.7 °C
13 January 1987
Snowiest day
10.4 cm
4 January 1979
Sunniest day
15.8 h
19 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 | 8.7 °C | +0.2 °C | 186 mm | +92 mm |
| Feb | 9.0 °C | +0.6 °C | 64 mm | -13 mm |
| Mar | 10.5 °C | +0.9 °C | 32 mm | -34 mm |
| Apr | 13.3 °C | +2.3 °C | 44 mm | -11 mm |
| May | 15.3 °C | +1.7 °C | 20 mm | -38 mm |
| Jun | 18.5 °C | +2.5 °C | 35 mm | -12 mm |
| Jul | 19.3 °C | +1.4 °C | 95 mm | +49 mm |
| Aug | 20.5 °C | +1.8 °C | 42 mm | -16 mm |
| Sep | 18.4 °C | +0.5 °C | 65 mm | -11 mm |
| Oct | 16.1 °C | +0.6 °C | 107 mm | +5 mm |
| Nov | 13.5 °C | +1.4 °C | 92 mm | -27 mm |
| Dec | 10.4 °C | +0.6 °C | 98 mm | -13 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 St-Malo?
St-Malo has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 12.0 °C and it receives 907 mm of precipitation per year.
What is the hottest day ever recorded in St-Malo?
The hottest day measured in St-Malo between 1940 and 2025 was 28 July 1947, reaching 30.6 °C.
What is the coldest day in St-Malo?
The coldest day measured in St-Malo between 1940 and 2025 was 17 January 1985, at -6.0 °C.
Does it snow in St-Malo?
Yes. St-Malo gets on average 4.1 cm of snow per year and has around 2 frost days.
Has the climate of St-Malo warmed?
Yes: St-Malo warmed by +1.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in St-Malo?
The wettest day measured in St-Malo between 1940 and 2025 was 13 November 2010, with 50 mm of rain in 24 hours.
What was the windiest day in St-Malo?
The windiest day measured in St-Malo between 1940 and 2025 was 2 November 2023, with winds reaching 88.0 km/h.
What is the warmest month in St-Malo?
The warmest month in St-Malo is August (17.5 °C on average); the coldest is February (7.1 °C).
How much does it rain in St-Malo?
St-Malo receives on average 907 mm of precipitation per year, spread over about 151 rainy days.
Is it sunny in St-Malo?
St-Malo gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in St-Malo?
The heaviest 24-hour snowfall measured in St-Malo between 1940 and 2025 was 4 January 1979, with 10.4 cm.
Are there tropical nights in St-Malo?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in St-Malo.
What was the most extreme apparent temperature in St-Malo?
In St-Malo, between 1940 and 2025, the highest apparent temperature reached 30.6 °C on 28 July 1947, and the lowest was -15.7 °C on 13 January 1987.
Compare St-Malo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around St-Malo