Longueau climate — normals and trends
Longueau (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 678 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 (17.7 °C on average) and the coldest is January (3.2 °C). Rainfall peaks in May.
Longueau averages 45 frost days, 3 hot days (≥ 30 °C) and 133 rainy days per year.
Longueau has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 61 to 29 per year over the period.
The hottest day of the period reached 39.9 °C (on 25 July 2019) and the coldest -19.7 °C (on 30 December 1950).
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
LongueauHauts-de-France
- coords
- 49.87°, 2.36°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
13.9°C
Average daily low
6.9°C
Annual rainfall
678mm
Sunshine / day
7.9h
Mean relative humidity
80%
Average peak wind
19.7km/h
Seasonal range
14.5°C
Frost days (< 0 °C)
45 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
14.1 cm
Average feels-like high
11.4 °C
Average feels-like low
4.0 °C
Average peak gust
37.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °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
39.9 °C
25 July 2019
Coldest day
-19.7 °C
30 December 1950
Wettest day
43 mm
5 June 2002
Windiest day
57.4 km/h
12 January 2017
Strongest gust
118.8 km/h
25 January 1990
Hottest feels-like
40.1 °C
6 July 1957
Coldest feels-like
-25.1 °C
17 January 1985
Snowiest day
14.7 cm
9 January 1968
Sunniest day
15.9 h
3 July 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 | 5.6 °C | +0.1 °C | 159 mm | +105 mm |
| Feb | 7.0 °C | +0.2 °C | 40 mm | -8 mm |
| Mar | 12.9 °C | +2.7 °C | 20 mm | -32 mm |
| Apr | 17.9 °C | +4.6 °C | 23 mm | -31 mm |
| May | 19.3 °C | +2.5 °C | 40 mm | -25 mm |
| Jun | 24.1 °C | +4.2 °C | 55 mm | -5 mm |
| Jul | 24.0 °C | +1.9 °C | 81 mm | +23 mm |
| Aug | 24.8 °C | +2.7 °C | 24 mm | -33 mm |
| Sep | 19.7 °C | +0.5 °C | 57 mm | +5 mm |
| Oct | 15.3 °C | +0.5 °C | 76 mm | +18 mm |
| Nov | 10.9 °C | +1.5 °C | 57 mm | -3 mm |
| Dec | 8.5 °C | +2.1 °C | 40 mm | -21 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 Longueau?
Longueau has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 678 mm of precipitation per year.
What is the hottest day ever recorded in Longueau?
The hottest day measured in Longueau between 1940 and 2025 was 25 July 2019, reaching 39.9 °C.
What is the coldest day in Longueau?
The coldest day measured in Longueau between 1940 and 2025 was 30 December 1950, at -19.7 °C.
Does it snow in Longueau?
Yes. Longueau gets on average 14.1 cm of snow per year and has around 45 frost days.
Has the climate of Longueau warmed?
Yes: Longueau warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Longueau?
The wettest day measured in Longueau between 1940 and 2025 was 5 June 2002, with 43 mm of rain in 24 hours.
What was the windiest day in Longueau?
The windiest day measured in Longueau between 1940 and 2025 was 12 January 2017, with winds reaching 57.4 km/h.
What is the warmest month in Longueau?
The warmest month in Longueau is July (17.7 °C on average); the coldest is January (3.2 °C).
How much does it rain in Longueau?
Longueau receives on average 678 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Longueau?
Longueau gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Longueau?
The heaviest 24-hour snowfall measured in Longueau between 1940 and 2025 was 9 January 1968, with 14.7 cm.
Are there tropical nights in Longueau?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Longueau.
What was the most extreme apparent temperature in Longueau?
In Longueau, between 1940 and 2025, the highest apparent temperature reached 40.1 °C on 6 July 1957, and the lowest was -25.1 °C on 17 January 1985.
Compare Longueau with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Longueau