Déville-lès-Rouen climate — normals and trends
Déville-lès-Rouen (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.4 °C and it receives 763 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 (17.5 °C on average) and the coldest is January (3.6 °C). Rainfall peaks in November.
Déville-lès-Rouen averages 41 frost days, 3 hot days (≥ 30 °C) and 140 rainy days per year.
Déville-lès-Rouen 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 38.8 °C (on 25 July 2019) and the coldest -18.2 °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
Déville-lès-RouenNormandy
- coords
- 49.47°, 1.05°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.4°C
Average daily high
13.9°C
Average daily low
7.0°C
Annual rainfall
763mm
Sunshine / day
8.1h
Mean relative humidity
81%
Average peak wind
19.3km/h
Seasonal range
13.9°C
Frost days (< 0 °C)
41 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
140 d/yr
Annual snowfall
13.4 cm
Average feels-like high
11.6 °C
Average feels-like low
4.3 °C
Average peak gust
38.0 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.45 · 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
38.8 °C
25 July 2019
Coldest day
-18.2 °C
8 January 1985
Wettest day
64 mm
4 July 1975
Windiest day
56.2 km/h
16 October 1987
Strongest gust
118.1 km/h
25 January 1990
Hottest feels-like
40.0 °C
25 July 2019
Coldest feels-like
-23.7 °C
8 January 1985
Snowiest day
15.0 cm
19 February 1978
Sunniest day
16.0 h
15 June 1940
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 | 5.9 °C | 0.0 °C | 160 mm | +97 mm |
| Feb | 7.7 °C | +0.6 °C | 52 mm | -5 mm |
| Mar | 12.7 °C | +2.4 °C | 22 mm | -40 mm |
| Apr | 17.9 °C | +4.6 °C | 33 mm | -29 mm |
| May | 18.9 °C | +2.2 °C | 51 mm | -18 mm |
| Jun | 23.4 °C | +3.7 °C | 71 mm | +7 mm |
| Jul | 23.0 °C | +1.2 °C | 95 mm | +35 mm |
| Aug | 24.1 °C | +2.4 °C | 27 mm | -34 mm |
| Sep | 19.6 °C | +0.5 °C | 59 mm | -0 mm |
| Oct | 15.6 °C | +0.7 °C | 80 mm | +14 mm |
| Nov | 11.4 °C | +1.7 °C | 72 mm | +1 mm |
| Dec | 8.8 °C | +2.0 °C | 44 mm | -27 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 Déville-lès-Rouen?
Déville-lès-Rouen has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.4 °C and it receives 763 mm of precipitation per year.
What is the hottest day ever recorded in Déville-lès-Rouen?
The hottest day measured in Déville-lès-Rouen between 1940 and 2025 was 25 July 2019, reaching 38.8 °C.
What is the coldest day in Déville-lès-Rouen?
The coldest day measured in Déville-lès-Rouen between 1940 and 2025 was 8 January 1985, at -18.2 °C.
Does it snow in Déville-lès-Rouen?
Yes. Déville-lès-Rouen gets on average 13.4 cm of snow per year and has around 41 frost days.
Has the climate of Déville-lès-Rouen warmed?
Yes: Déville-lès-Rouen warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Déville-lès-Rouen?
The wettest day measured in Déville-lès-Rouen between 1940 and 2025 was 4 July 1975, with 64 mm of rain in 24 hours.
What was the windiest day in Déville-lès-Rouen?
The windiest day measured in Déville-lès-Rouen between 1940 and 2025 was 16 October 1987, with winds reaching 56.2 km/h.
What is the warmest month in Déville-lès-Rouen?
The warmest month in Déville-lès-Rouen is July (17.5 °C on average); the coldest is January (3.6 °C).
How much does it rain in Déville-lès-Rouen?
Déville-lès-Rouen receives on average 763 mm of precipitation per year, spread over about 140 rainy days.
Is it sunny in Déville-lès-Rouen?
Déville-lès-Rouen gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Déville-lès-Rouen?
The heaviest 24-hour snowfall measured in Déville-lès-Rouen between 1940 and 2025 was 19 February 1978, with 15.0 cm.
Are there tropical nights in Déville-lès-Rouen?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Déville-lès-Rouen.
What was the most extreme apparent temperature in Déville-lès-Rouen?
In Déville-lès-Rouen, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 25 July 2019, and the lowest was -23.7 °C on 8 January 1985.
Compare Déville-lès-Rouen with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Déville-lès-Rouen