Châtillon climate — normals and trends
Châtillon has a temperate oceanic climate, averaging 9.3 °C annually with 874 mm of rain per year.
Climate normals · ERA5
ChâtillonWallonia
- coords
- 49.62°, 5.70°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
9.3°C
Average daily high
12.8°C
Average daily low
5.8°C
Annual rainfall
874mm
Sunshine / day
7.5h
Mean relative humidity
80%
Average peak wind
18.5km/h
Seasonal range
16.6°C
Frost days (< 0 °C)
67 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
148 d/yr
Annual snowfall
37.9 cm
Average feels-like high
10.3 °C
Average feels-like low
2.8 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.2 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
38.0 °C
25 July 2019
Coldest day
-18.2 °C
22 January 1942
Wettest day
66 mm
14 July 2021
Windiest day
55.6 km/h
3 February 1990
Strongest gust
123.8 km/h
24 November 1984
Hottest feels-like
38.7 °C
26 June 2026
Coldest feels-like
-24.9 °C
6 January 1947
Snowiest day
12.7 cm
7 January 1968
Sunniest day
15.3 h
6 July 2023
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 5.2 °C | +2.1 °C | 131 mm | +54 mm |
| Feb | 5.8 °C | +1.0 °C | 47 mm | -20 mm |
| Mar | 12.8 °C | +3.9 °C | 16 mm | -53 mm |
| Apr | 16.5 °C | +3.7 °C | 60 mm | -5 mm |
| May | 19.2 °C | +2.4 °C | 40 mm | -38 mm |
| Jun | 24.6 °C | +4.6 °C | 65 mm | -10 mm |
| Jul | 23.4 °C | +1.4 °C | 112 mm | +44 mm |
| Aug | 24.5 °C | +2.9 °C | 54 mm | -19 mm |
| Sep | 18.5 °C | +0.3 °C | 157 mm | +89 mm |
| Oct | 13.6 °C | +0.4 °C | 100 mm | +30 mm |
| Nov | 9.2 °C | +1.9 °C | 67 mm | -11 mm |
| Dec | 7.1 °C | +2.9 °C | 39 mm | -45 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Châtillon (Belgium) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.3 °C and it receives 874 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 (17.6 °C on average) and the coldest is January (1.0 °C). Rainfall peaks in December.
Châtillon averages 67 frost days, 3 hot days (≥ 30 °C) and 148 rainy days per year.
Châtillon 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 82 to 52 per year over the period.
The hottest day of the period reached 38.0 °C (on 25 July 2019) and the coldest -18.2 °C (on 22 January 1942).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Frequently asked questions
What is the climate of Châtillon?
Châtillon has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.3 °C and it receives 874 mm of precipitation per year.
What is the hottest day ever recorded in Châtillon?
The hottest day measured in Châtillon between 1940 and 2025 was 25 July 2019, reaching 38.0 °C.
What is the coldest day in Châtillon?
The coldest day measured in Châtillon between 1940 and 2025 was 22 January 1942, at -18.2 °C.
Does it snow in Châtillon?
Yes. Châtillon gets on average 37.9 cm of snow per year and has around 67 frost days.
Has the climate of Châtillon warmed?
Yes: Châtillon warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Châtillon?
The wettest day measured in Châtillon between 1940 and 2025 was 14 July 2021, with 66 mm of rain in 24 hours.
What was the windiest day in Châtillon?
The windiest day measured in Châtillon between 1940 and 2025 was 3 February 1990, with winds reaching 55.6 km/h.
What is the warmest month in Châtillon?
The warmest month in Châtillon is July (17.6 °C on average); the coldest is January (1.0 °C).
How much does it rain in Châtillon?
Châtillon receives on average 874 mm of precipitation per year, spread over about 148 rainy days.
Is it sunny in Châtillon?
Châtillon gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Châtillon?
The heaviest 24-hour snowfall measured in Châtillon between 1940 and 2025 was 7 January 1968, with 12.7 cm.
Are there tropical nights in Châtillon?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Châtillon.
What was the most extreme apparent temperature in Châtillon?
In Châtillon, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 26 June 2026, and the lowest was -24.9 °C on 6 January 1947.
These forecasts and records come from our own weather API. Developer documentation →
Compare Châtillon with another city
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Nearby cities
The climate around Châtillon