Average annual temperature is 11.9 °C
Absolute maximum temperature: 31.1 °C
Absolute minimum temperature: -5.3 °C
Number of sunny days: 120 days
Number of rainy days: 244 days
Number of snow days: 1 day
Look at detailed online map of Sint-Janswijk
* Weather data for Sint-Janswijk 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) | 15.0 | 11.6 | 17.0 | 17.1 | 23.5 | 30.7 | 31.1 | 27.3 | 30.8 | 24.6 | 15.0 | 12.6 |
| Average daytime temperature (°C) | 7.6 | 8.6 | 10.4 | 12.3 | 17.6 | 25.2 | 22.4 | 21.8 | 23.2 | 17.1 | 10.2 | 8.9 |
| Average temperature (°C) | 5.4 | 5.5 | 7.2 | 8.5 | 13.1 | 19.9 | 18.4 | 17.9 | 18.7 | 13.7 | 7.9 | 6.8 |
| Average night temperature (°C) | 3.0 | 2.4 | 3.9 | 4.5 | 8.2 | 13.9 | 14.3 | 13.9 | 14.2 | 10.6 | 5.7 | 4.7 |
| Absolute minimum temperature (°C) | -3.8 | -3.6 | -2.8 | -2.1 | 3.3 | 9.7 | 11.6 | 10.2 | 9.3 | 2.8 | -1.2 | -5.3 |
| 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) | 3.6 | 4.5 | 4.5 | 7.7 | 10.5 | 13.0 | 10.6 | 10.2 | 9.1 | 6.2 | 3.7 | 2.0 |
| Precipitation (mm) | 93 | 13 | 129 | 78 | 55 | 40 | 122 | 78 | 59 | 114 | 147 | 86 |
| Sunny days | 9 | 14 | 3 | 8 | 17 | 20 | 5 | 8 | 18 | 9 | 2 | 7 |
| Rainy days | 22 | 13 | 28 | 22 | 14 | 10 | 26 | 23 | 12 | 22 | 28 | 24 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Sint-Janswijk during the most sunny months:
Months with the longest average daylight duration in Sint-Janswijk:
The largest precipitation sum in Sint-Janswijk is at