Marennes climate — normals and trends
Marennes (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 13.2 °C and it receives 716 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 (20.7 °C on average) and the coldest is January (6.2 °C). Rainfall peaks in December.
Marennes averages 22 frost days, 14 hot days (≥ 30 °C) and 125 rainy days per year.
Marennes has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 28 to 16 per year over the period.
The hottest day of the period reached 41.0 °C (on 18 June 2022) and the coldest -12.2 °C (on 22 February 1956).
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
MarennesNew Aquitaine
- coords
- 45.82°, -1.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
13.2°C
Average daily high
17.2°C
Average daily low
9.5°C
Annual rainfall
716mm
Sunshine / day
9.2h
Mean relative humidity
76%
Average peak wind
19.9km/h
Seasonal range
14.5°C
Frost days (< 0 °C)
22 d/yr
Hot days (≥ 30 °C)
14 d/yr
Rainy days (≥ 1 mm)
125 d/yr
Annual snowfall
2.3 cm
Average feels-like high
15.4 °C
Average feels-like low
7.2 °C
Average peak gust
37.7 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
13.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.34 · 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
41.0 °C
18 June 2022
Coldest day
-12.2 °C
22 February 1956
Wettest day
53 mm
3 October 2006
Windiest day
80.1 km/h
27 December 1999
Strongest gust
144.0 km/h
27 December 1999
Hottest feels-like
42.2 °C
23 August 2023
Coldest feels-like
-18.2 °C
12 January 1987
Snowiest day
9.4 cm
28 November 1947
Sunniest day
15.3 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 | 10.5 °C | +1.3 °C | 148 mm | +78 mm |
| Feb | 12.6 °C | +2.1 °C | 79 mm | +18 mm |
| Mar | 14.6 °C | +1.1 °C | 36 mm | -21 mm |
| Apr | 18.9 °C | +2.8 °C | 92 mm | +34 mm |
| May | 21.6 °C | +2.1 °C | 45 mm | -19 mm |
| Jun | 28.0 °C | +5.0 °C | 12 mm | -35 mm |
| Jul | 26.7 °C | +1.4 °C | 31 mm | -7 mm |
| Aug | 29.0 °C | +3.8 °C | 49 mm | +6 mm |
| Sep | 21.8 °C | -1.0 °C | 56 mm | +2 mm |
| Oct | 19.4 °C | +1.0 °C | 82 mm | +13 mm |
| Nov | 14.6 °C | +1.7 °C | 95 mm | +18 mm |
| Dec | 11.2 °C | +1.3 °C | 57 mm | -22 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 Marennes?
Marennes has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 13.2 °C and it receives 716 mm of precipitation per year.
What is the hottest day ever recorded in Marennes?
The hottest day measured in Marennes between 1940 and 2025 was 18 June 2022, reaching 41.0 °C.
What is the coldest day in Marennes?
The coldest day measured in Marennes between 1940 and 2025 was 22 February 1956, at -12.2 °C.
Does it snow in Marennes?
Yes. Marennes gets on average 2.3 cm of snow per year and has around 22 frost days.
Has the climate of Marennes warmed?
Yes: Marennes warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Marennes?
The wettest day measured in Marennes between 1940 and 2025 was 3 October 2006, with 53 mm of rain in 24 hours.
What was the windiest day in Marennes?
The windiest day measured in Marennes between 1940 and 2025 was 27 December 1999, with winds reaching 80.1 km/h.
What is the warmest month in Marennes?
The warmest month in Marennes is July (20.7 °C on average); the coldest is January (6.2 °C).
How much does it rain in Marennes?
Marennes receives on average 716 mm of precipitation per year, spread over about 125 rainy days.
Is it sunny in Marennes?
Marennes gets on average 9.2 hours of sunshine per day, roughly 3,358 hours per year over 1940-2025.
What is the biggest single-day snowfall in Marennes?
The heaviest 24-hour snowfall measured in Marennes between 1940 and 2025 was 28 November 1947, with 9.4 cm.
Are there tropical nights in Marennes?
Yes: Marennes has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Marennes?
In Marennes, between 1940 and 2025, the highest apparent temperature reached 42.2 °C on 23 August 2023, and the lowest was -18.2 °C on 12 January 1987.
Compare Marennes with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Marennes