Grand-Reng climate — normals and trends
Grand-Reng has a temperate oceanic climate, averaging 9.8 °C annually with 815 mm of rain per year.
Climate normals · ERA5
Grand-RengWallonia
- coords
- 50.33°, 4.08°
- 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
9.8°C
Average daily high
13.1°C
Average daily low
6.3°C
Annual rainfall
815mm
Sunshine / day
7.5h
Mean relative humidity
81%
Average peak wind
20.1km/h
Seasonal range
15.0°C
Frost days (< 0 °C)
54 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
151 d/yr
Annual snowfall
24.5 cm
Average feels-like high
10.6 °C
Average feels-like low
3.3 °C
Average peak gust
38.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.9 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.42 · 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
38.4 °C
25 July 2019
Coldest day
-19.8 °C
22 January 1942
Wettest day
76 mm
22 June 2023
Windiest day
56.6 km/h
24 November 1984
Strongest gust
125.6 km/h
24 November 1984
Hottest feels-like
40.0 °C
26 June 2026
Coldest feels-like
-25.4 °C
22 January 1942
Snowiest day
12.5 cm
20 November 1988
Sunniest day
15.9 h
29 June 2019
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 | 4.8 °C | +0.4 °C | 176 mm | +104 mm |
| Feb | 6.6 °C | +0.9 °C | 53 mm | -9 mm |
| Mar | 12.7 °C | +3.4 °C | 16 mm | -49 mm |
| Apr | 17.1 °C | +4.3 °C | 23 mm | -37 mm |
| May | 19.0 °C | +2.4 °C | 61 mm | -12 mm |
| Jun | 23.7 °C | +4.2 °C | 61 mm | -10 mm |
| Jul | 23.8 °C | +2.4 °C | 78 mm | +6 mm |
| Aug | 24.1 °C | +2.9 °C | 31 mm | -38 mm |
| Sep | 19.2 °C | +0.9 °C | 60 mm | +1 mm |
| Oct | 14.2 °C | +0.4 °C | 83 mm | +18 mm |
| Nov | 9.8 °C | +1.4 °C | 70 mm | -2 mm |
| Dec | 7.9 °C | +2.5 °C | 32 mm | -41 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.
Grand-Reng (Belgium) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.8 °C and it receives 815 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 (2.3 °C). Rainfall peaks in May.
Grand-Reng averages 54 frost days, 2 hot days (≥ 30 °C) and 151 rainy days per year.
Grand-Reng 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 70 to 38 per year over the period.
The hottest day of the period reached 38.4 °C (on 25 July 2019) and the coldest -19.8 °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 Grand-Reng?
Grand-Reng has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.8 °C and it receives 815 mm of precipitation per year.
What is the hottest day ever recorded in Grand-Reng?
The hottest day measured in Grand-Reng between 1940 and 2025 was 25 July 2019, reaching 38.4 °C.
What is the coldest day in Grand-Reng?
The coldest day measured in Grand-Reng between 1940 and 2025 was 22 January 1942, at -19.8 °C.
Does it snow in Grand-Reng?
Yes. Grand-Reng gets on average 24.5 cm of snow per year and has around 54 frost days.
Has the climate of Grand-Reng warmed?
Yes: Grand-Reng warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grand-Reng?
The wettest day measured in Grand-Reng between 1940 and 2025 was 22 June 2023, with 76 mm of rain in 24 hours.
What was the windiest day in Grand-Reng?
The windiest day measured in Grand-Reng between 1940 and 2025 was 24 November 1984, with winds reaching 56.6 km/h.
What is the warmest month in Grand-Reng?
The warmest month in Grand-Reng is July (17.3 °C on average); the coldest is January (2.3 °C).
How much does it rain in Grand-Reng?
Grand-Reng receives on average 815 mm of precipitation per year, spread over about 151 rainy days.
Is it sunny in Grand-Reng?
Grand-Reng 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 Grand-Reng?
The heaviest 24-hour snowfall measured in Grand-Reng between 1940 and 2025 was 20 November 1988, with 12.5 cm.
Are there tropical nights in Grand-Reng?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Grand-Reng.
What was the most extreme apparent temperature in Grand-Reng?
In Grand-Reng, between 1940 and 2025, the highest apparent temperature reached 40.0 °C on 26 June 2026, and the lowest was -25.4 °C on 22 January 1942.
These forecasts and records come from our own weather API. Developer documentation →
Compare Grand-Reng with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Grand-Reng