Laon climate — normals and trends
Laon (France) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 10.5 °C and it receives 738 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 (18.5 °C on average) and the coldest is January (2.8 °C). Rainfall peaks in December.
Laon averages 48 frost days, 5 hot days (≥ 30 °C) and 138 rainy days per year.
Laon has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 62 to 34 per year over the period.
The hottest day of the period reached 43.0 °C (on 25 July 2019) and the coldest -23.0 °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
LaonHauts-de-France
- coords
- 49.56°, 3.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.5°C
Average daily high
14.2°C
Average daily low
7.0°C
Annual rainfall
738mm
Sunshine / day
7.7h
Mean relative humidity
79%
Average peak wind
18.2km/h
Seasonal range
15.7°C
Frost days (< 0 °C)
48 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
138 d/yr
Annual snowfall
16.6 cm
Average feels-like high
11.9 °C
Average feels-like low
4.3 °C
Average peak gust
36.4 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
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.43 · 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
43.0 °C
25 July 2019
Coldest day
-23.0 °C
30 December 1950
Wettest day
87 mm
22 June 2023
Windiest day
53.6 km/h
3 February 1990
Strongest gust
115.2 km/h
24 November 1984
Hottest feels-like
42.5 °C
25 July 2019
Coldest feels-like
-27.9 °C
30 December 1950
Snowiest day
11.3 cm
9 January 1968
Sunniest day
15.8 h
29 June 2019
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 | +0.8 °C | 141 mm | +80 mm |
| Feb | 7.1 °C | +0.5 °C | 54 mm | -2 mm |
| Mar | 13.6 °C | +3.2 °C | 14 mm | -44 mm |
| Apr | 18.4 °C | +4.5 °C | 30 mm | -27 mm |
| May | 20.3 °C | +2.6 °C | 30 mm | -38 mm |
| Jun | 25.6 °C | +4.8 °C | 73 mm | +9 mm |
| Jul | 25.0 °C | +2.0 °C | 104 mm | +45 mm |
| Aug | 25.6 °C | +2.7 °C | 53 mm | -7 mm |
| Sep | 20.1 °C | +0.4 °C | 81 mm | +25 mm |
| Oct | 15.5 °C | +0.6 °C | 67 mm | +5 mm |
| Nov | 10.6 °C | +1.5 °C | 59 mm | -9 mm |
| Dec | 8.5 °C | +2.5 °C | 33 mm | -36 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 Laon?
Laon has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 10.5 °C and it receives 738 mm of precipitation per year.
What is the hottest day ever recorded in Laon?
The hottest day measured in Laon between 1940 and 2025 was 25 July 2019, reaching 43.0 °C.
What is the coldest day in Laon?
The coldest day measured in Laon between 1940 and 2025 was 30 December 1950, at -23.0 °C.
Does it snow in Laon?
Yes. Laon gets on average 16.6 cm of snow per year and has around 48 frost days.
Has the climate of Laon warmed?
Yes: Laon warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Laon?
The wettest day measured in Laon between 1940 and 2025 was 22 June 2023, with 87 mm of rain in 24 hours.
What was the windiest day in Laon?
The windiest day measured in Laon between 1940 and 2025 was 3 February 1990, with winds reaching 53.6 km/h.
What is the warmest month in Laon?
The warmest month in Laon is July (18.5 °C on average); the coldest is January (2.8 °C).
How much does it rain in Laon?
Laon receives on average 738 mm of precipitation per year, spread over about 138 rainy days.
Is it sunny in Laon?
Laon gets on average 7.7 hours of sunshine per day, roughly 2,811 hours per year over 1940-2025.
What is the biggest single-day snowfall in Laon?
The heaviest 24-hour snowfall measured in Laon between 1940 and 2025 was 9 January 1968, with 11.3 cm.
Are there tropical nights in Laon?
Yes: Laon has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Laon?
In Laon, between 1940 and 2025, the highest apparent temperature reached 42.5 °C on 25 July 2019, and the lowest was -27.9 °C on 30 December 1950.
Compare Laon with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Laon