Average annual temperature is 11.7 °C
Absolute maximum temperature: 30.9 °C
Absolute minimum temperature: -5.8 °C
Number of sunny days: 118 days
Number of rainy days: 247 days
Look at detailed online map of Casteau
* Weather data for Casteau 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) | 14.4 | 12.3 | 16.3 | 16.6 | 23.4 | 29.4 | 29.9 | 28.0 | 30.9 | 24.7 | 15.0 | 12.4 |
| Average daytime temperature (°C) | 6.9 | 8.4 | 10.4 | 12.3 | 17.6 | 24.6 | 22.4 | 21.9 | 23.1 | 17.0 | 9.9 | 8.3 |
| Average temperature (°C) | 4.8 | 5.2 | 7.1 | 8.3 | 13.0 | 19.6 | 18.4 | 17.9 | 18.5 | 13.4 | 7.6 | 6.4 |
| Average night temperature (°C) | 2.4 | 2.0 | 3.6 | 4.0 | 8.0 | 13.8 | 14.0 | 13.5 | 14.0 | 10.0 | 5.3 | 4.3 |
| Absolute minimum temperature (°C) | -4.0 | -4.6 | -3.7 | -3.0 | 3.5 | 9.8 | 11.0 | 10.4 | 8.3 | 1.6 | -0.4 | -5.8 |
| 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) | 8.6 | 10.1 | 11.9 | 13.8 | 15.5 | 16.4 | 15.9 | 14.5 | 12.6 | 10.7 | 9.0 | 8.1 |
| 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) | 2.8 | 4.9 | 4.9 | 7.1 | 10.2 | 12.7 | 10.6 | 10.1 | 9.0 | 6.2 | 3.3 | 2.0 |
| Precipitation (mm) | 81 | 13 | 134 | 82 | 62 | 28 | 134 | 86 | 96 | 110 | 119 | 91 |
| Sunny days | 9 | 14 | 5 | 9 | 13 | 20 | 6 | 6 | 18 | 10 | 1 | 7 |
| Rainy days | 22 | 14 | 26 | 21 | 18 | 10 | 25 | 25 | 12 | 21 | 29 | 24 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Casteau during the most sunny months:
Months with the longest average daylight duration in Casteau:
The largest precipitation sum in Casteau is at