Gaillon climate — normals and trends
Gaillon (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.6 °C and it receives 664 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 (18.0 °C on average) and the coldest is January (3.6 °C). Rainfall peaks in May.
Gaillon averages 41 frost days, 3 hot days (≥ 30 °C) and 129 rainy days per year.
Gaillon has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 56 to 26 per year over the period.
The hottest day of the period reached 39.2 °C (on 25 July 2019) and the coldest -18.7 °C (on 8 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
GaillonNormandy
- coords
- 49.16°, 1.34°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.6°C
Average daily high
14.2°C
Average daily low
7.1°C
Annual rainfall
664mm
Sunshine / day
7.8h
Mean relative humidity
80%
Average peak wind
18.8km/h
Seasonal range
14.4°C
Frost days (< 0 °C)
41 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
129 d/yr
Annual snowfall
12.3 cm
Average feels-like high
12.0 °C
Average feels-like low
4.5 °C
Average peak gust
37.4 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
39.2 °C
25 July 2019
Coldest day
-18.7 °C
8 January 1985
Wettest day
57 mm
4 July 1975
Windiest day
55.6 km/h
11 March 1963
Strongest gust
118.4 km/h
25 January 1990
Hottest feels-like
40.4 °C
6 August 2003
Coldest feels-like
-24.1 °C
8 January 1985
Snowiest day
12.0 cm
19 February 1978
Sunniest day
16.0 h
22 June 1941
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 | 6.3 °C | +0.3 °C | 153 mm | +98 mm |
| Feb | 7.7 °C | +0.5 °C | 47 mm | -4 mm |
| Mar | 13.0 °C | +2.4 °C | 23 mm | -30 mm |
| Apr | 18.2 °C | +4.6 °C | 32 mm | -21 mm |
| May | 19.8 °C | +2.7 °C | 47 mm | -15 mm |
| Jun | 24.7 °C | +4.4 °C | 60 mm | +4 mm |
| Jul | 24.0 °C | +1.6 °C | 82 mm | +32 mm |
| Aug | 25.1 °C | +2.8 °C | 26 mm | -25 mm |
| Sep | 20.0 °C | +0.5 °C | 58 mm | +8 mm |
| Oct | 15.8 °C | +0.7 °C | 61 mm | +2 mm |
| Nov | 11.5 °C | +1.8 °C | 57 mm | -5 mm |
| Dec | 8.9 °C | +2.0 °C | 40 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 Gaillon?
Gaillon has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.6 °C and it receives 664 mm of precipitation per year.
What is the hottest day ever recorded in Gaillon?
The hottest day measured in Gaillon between 1940 and 2025 was 25 July 2019, reaching 39.2 °C.
What is the coldest day in Gaillon?
The coldest day measured in Gaillon between 1940 and 2025 was 8 January 1985, at -18.7 °C.
Does it snow in Gaillon?
Yes. Gaillon gets on average 12.3 cm of snow per year and has around 41 frost days.
Has the climate of Gaillon warmed?
Yes: Gaillon warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gaillon?
The wettest day measured in Gaillon between 1940 and 2025 was 4 July 1975, with 57 mm of rain in 24 hours.
What was the windiest day in Gaillon?
The windiest day measured in Gaillon between 1940 and 2025 was 11 March 1963, with winds reaching 55.6 km/h.
What is the warmest month in Gaillon?
The warmest month in Gaillon is July (18.0 °C on average); the coldest is January (3.6 °C).
How much does it rain in Gaillon?
Gaillon receives on average 664 mm of precipitation per year, spread over about 129 rainy days.
Is it sunny in Gaillon?
Gaillon gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gaillon?
The heaviest 24-hour snowfall measured in Gaillon between 1940 and 2025 was 19 February 1978, with 12.0 cm.
Are there tropical nights in Gaillon?
Yes: Gaillon has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gaillon?
In Gaillon, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 6 August 2003, and the lowest was -24.1 °C on 8 January 1985.
Compare Gaillon with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gaillon