Lillebonne climate — normals and trends
Lillebonne (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.5 °C and it receives 809 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 (17.3 °C on average) and the coldest is January (4.1 °C). Rainfall peaks in November.
Lillebonne averages 33 frost days, 2 hot days (≥ 30 °C) and 147 rainy days per year.
Lillebonne 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 47 to 19 per year over the period.
The hottest day of the period reached 38.1 °C (on 25 July 2019) and the coldest -17.7 °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
LillebonneNormandy
- coords
- 49.52°, 0.54°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.5°C
Average daily high
13.8°C
Average daily low
7.4°C
Annual rainfall
809mm
Sunshine / day
8.4h
Mean relative humidity
81%
Average peak wind
20.4km/h
Seasonal range
13.2°C
Frost days (< 0 °C)
33 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
147 d/yr
Annual snowfall
12.4 cm
Average feels-like high
11.5 °C
Average feels-like low
4.5 °C
Average peak gust
40.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.0 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
38.1 °C
25 July 2019
Coldest day
-17.7 °C
8 January 1985
Wettest day
53 mm
20 July 1980
Windiest day
60.0 km/h
16 October 1987
Strongest gust
122.8 km/h
24 November 1984
Hottest feels-like
39.9 °C
28 July 1947
Coldest feels-like
-23.0 °C
8 January 1985
Snowiest day
14.3 cm
11 March 2013
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 | 6.2 °C | -0.1 °C | 166 mm | +96 mm |
| Feb | 8.0 °C | +0.7 °C | 54 mm | -7 mm |
| Mar | 12.6 °C | +2.3 °C | 22 mm | -41 mm |
| Apr | 17.5 °C | +4.5 °C | 26 mm | -36 mm |
| May | 18.2 °C | +1.9 °C | 54 mm | -17 mm |
| Jun | 22.6 °C | +3.4 °C | 68 mm | +4 mm |
| Jul | 22.2 °C | +1.0 °C | 95 mm | +35 mm |
| Aug | 23.2 °C | +2.0 °C | 33 mm | -30 mm |
| Sep | 19.4 °C | +0.5 °C | 59 mm | -5 mm |
| Oct | 15.6 °C | +0.7 °C | 98 mm | +25 mm |
| Nov | 11.8 °C | +1.8 °C | 88 mm | +9 mm |
| Dec | 9.0 °C | +1.8 °C | 47 mm | -32 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 Lillebonne?
Lillebonne has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.5 °C and it receives 809 mm of precipitation per year.
What is the hottest day ever recorded in Lillebonne?
The hottest day measured in Lillebonne between 1940 and 2025 was 25 July 2019, reaching 38.1 °C.
What is the coldest day in Lillebonne?
The coldest day measured in Lillebonne between 1940 and 2025 was 8 January 1985, at -17.7 °C.
Does it snow in Lillebonne?
Yes. Lillebonne gets on average 12.4 cm of snow per year and has around 33 frost days.
Has the climate of Lillebonne warmed?
Yes: Lillebonne warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lillebonne?
The wettest day measured in Lillebonne between 1940 and 2025 was 20 July 1980, with 53 mm of rain in 24 hours.
What was the windiest day in Lillebonne?
The windiest day measured in Lillebonne between 1940 and 2025 was 16 October 1987, with winds reaching 60.0 km/h.
What is the warmest month in Lillebonne?
The warmest month in Lillebonne is July (17.3 °C on average); the coldest is January (4.1 °C).
How much does it rain in Lillebonne?
Lillebonne receives on average 809 mm of precipitation per year, spread over about 147 rainy days.
Is it sunny in Lillebonne?
Lillebonne gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Lillebonne?
The heaviest 24-hour snowfall measured in Lillebonne between 1940 and 2025 was 11 March 2013, with 14.3 cm.
Are there tropical nights in Lillebonne?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Lillebonne.
What was the most extreme apparent temperature in Lillebonne?
In Lillebonne, between 1940 and 2025, the highest apparent temperature reached 39.9 °C on 28 July 1947, and the lowest was -23.0 °C on 8 January 1985.
Compare Lillebonne with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Lillebonne