Bastogne climate — normals and trends
Bastogne (Belgium) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.1 °C and it receives 965 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 (16.1 °C on average) and the coldest is January (0.0 °C). Rainfall peaks in December.
Bastogne averages 79 frost days, 1 hot days (≥ 30 °C) and 163 rainy days per year.
Bastogne has warmed by +1.8 °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 95 to 63 per year over the period.
The hottest day of the period reached 35.6 °C (on 25 July 2019) and the coldest -21.7 °C (on 1 January 1979).
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
BastogneWallonia
- coords
- 50.00°, 5.72°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.1°C
Average daily high
11.3°C
Average daily low
4.9°C
Annual rainfall
965mm
Sunshine / day
7.3h
Mean relative humidity
83%
Average peak wind
19.6km/h
Seasonal range
16.1°C
Frost days (< 0 °C)
79 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
163 d/yr
Annual snowfall
67.2 cm
Average feels-like high
8.6 °C
Average feels-like low
1.7 °C
Average peak gust
38.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.39 · 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).
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
35.6 °C
25 July 2019
Coldest day
-21.7 °C
1 January 1979
Wettest day
57 mm
11 May 1970
Windiest day
57.0 km/h
24 November 1984
Strongest gust
129.6 km/h
24 November 1984
Hottest feels-like
37.0 °C
25 July 2019
Coldest feels-like
-27.3 °C
1 January 1979
Snowiest day
17.2 cm
13 December 1952
Sunniest day
15.4 h
26 June 2001
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 | 3.7 °C | +1.7 °C | 161 mm | +78 mm |
| Feb | 4.6 °C | +1.3 °C | 50 mm | -23 mm |
| Mar | 11.4 °C | +4.0 °C | 14 mm | -63 mm |
| Apr | 15.0 °C | +3.7 °C | 60 mm | -12 mm |
| May | 17.5 °C | +2.2 °C | 54 mm | -32 mm |
| Jun | 22.7 °C | +4.4 °C | 74 mm | -13 mm |
| Jul | 21.9 °C | +1.7 °C | 127 mm | +40 mm |
| Aug | 22.6 °C | +2.7 °C | 36 mm | -46 mm |
| Sep | 17.1 °C | +0.4 °C | 151 mm | +77 mm |
| Oct | 12.1 °C | +0.2 °C | 112 mm | +39 mm |
| Nov | 8.1 °C | +1.9 °C | 62 mm | -21 mm |
| Dec | 6.2 °C | +3.0 °C | 34 mm | -55 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 Bastogne?
Bastogne has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.1 °C and it receives 965 mm of precipitation per year.
What is the hottest day ever recorded in Bastogne?
The hottest day measured in Bastogne between 1940 and 2025 was 25 July 2019, reaching 35.6 °C.
What is the coldest day in Bastogne?
The coldest day measured in Bastogne between 1940 and 2025 was 1 January 1979, at -21.7 °C.
Does it snow in Bastogne?
Yes. Bastogne gets on average 67.2 cm of snow per year and has around 79 frost days.
Has the climate of Bastogne warmed?
Yes: Bastogne warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bastogne?
The wettest day measured in Bastogne between 1940 and 2025 was 11 May 1970, with 57 mm of rain in 24 hours.
What was the windiest day in Bastogne?
The windiest day measured in Bastogne between 1940 and 2025 was 24 November 1984, with winds reaching 57.0 km/h.
What is the warmest month in Bastogne?
The warmest month in Bastogne is July (16.1 °C on average); the coldest is January (0.0 °C).
How much does it rain in Bastogne?
Bastogne receives on average 965 mm of precipitation per year, spread over about 163 rainy days.
Is it sunny in Bastogne?
Bastogne gets on average 7.3 hours of sunshine per day, roughly 2,665 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bastogne?
The heaviest 24-hour snowfall measured in Bastogne between 1940 and 2025 was 13 December 1952, with 17.2 cm.
Are there tropical nights in Bastogne?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bastogne.
What was the most extreme apparent temperature in Bastogne?
In Bastogne, between 1940 and 2025, the highest apparent temperature reached 37.0 °C on 25 July 2019, and the lowest was -27.3 °C on 1 January 1979.
Compare Bastogne with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bastogne