Average annual temperature is 11.9 °C
Absolute maximum temperature: 31.5 °C
Absolute minimum temperature: -4.3 °C
Number of sunny days: 114 days
Number of rainy days: 249 days
Number of snow days: 2 days
Look at detailed online map of Groot-Gelmen
* Weather data for Groot-Gelmen Belgium is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 15.2 | 13.4 | 16.8 | 18.1 | 23.9 | 29.6 | 31.5 | 27.4 | 30.4 | 25.5 | 15.4 | 11.6 |
| Average daytime temperature (°C) | 6.9 | 8.4 | 10.5 | 12.6 | 18.2 | 25.1 | 22.7 | 22.2 | 23.3 | 17.1 | 9.8 | 8.4 |
| Average temperature (°C) | 5.0 | 5.2 | 7.1 | 8.5 | 13.4 | 20.2 | 18.7 | 18.1 | 18.6 | 13.7 | 7.6 | 6.5 |
| Average night temperature (°C) | 2.8 | 2.1 | 3.7 | 4.2 | 8.1 | 14.5 | 14.3 | 14.0 | 13.8 | 10.5 | 5.4 | 4.5 |
| Absolute minimum temperature (°C) | -3.8 | -4.3 | -4.1 | -2.2 | 3.3 | 10.1 | 10.8 | 11.0 | 8.6 | 1.7 | -2.2 | -4.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.5 | 10.0 | 11.9 | 13.8 | 15.5 | 16.4 | 16.0 | 14.5 | 12.6 | 10.7 | 9.0 | 8.0 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 7.0 |
| Sunshine mean duration (h) | 2.7 | 4.9 | 5.5 | 7.3 | 10.9 | 13.0 | 11.1 | 9.9 | 9.6 | 6.3 | 3.3 | 2.5 |
| Precipitation (mm) | 93 | 21 | 128 | 74 | 51 | 49 | 112 | 100 | 110 | 113 | 132 | 88 |
| Sunny days | 6 | 14 | 5 | 9 | 15 | 18 | 3 | 7 | 17 | 11 | 2 | 7 |
| Rainy days | 23 | 14 | 26 | 21 | 16 | 12 | 28 | 24 | 13 | 20 | 28 | 24 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Groot-Gelmen during the most sunny months:
Months with the longest average daylight duration in Groot-Gelmen:
The largest precipitation sum in Groot-Gelmen is at