Average annual temperature is 5.7 °C
Absolute maximum temperature: 26.7 °C
Absolute minimum temperature: -23.9 °C
Number of sunny days: 148 days
Number of rainy days: 180 days
Number of snow days: 37 days
Look at detailed online map of Siwan
* Weather data for Siwan China is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 8.0 | 5.7 | 12.9 | 20.7 | 19.8 | 23.5 | 26.7 | 24.1 | 23.2 | 14.2 | 12.5 | 9.9 |
| Average daytime temperature (°C) | -2.4 | 0.0 | 6.6 | 9.8 | 13.3 | 18.8 | 21.8 | 20.6 | 16.4 | 10.9 | 5.4 | 0.8 |
| Average temperature (°C) | -7.3 | -3.9 | 1.7 | 4.9 | 9.2 | 14.5 | 17.4 | 16.1 | 12.2 | 6.8 | 0.6 | -4.4 |
| Average night temperature (°C) | -12.8 | -8.2 | -3.1 | 0.5 | 5.8 | 10.2 | 13.2 | 12.3 | 9.2 | 3.3 | -3.6 | -9.4 |
| Absolute minimum temperature (°C) | -23.9 | -16.8 | -9.6 | -9.6 | -1.8 | 5.2 | 8.5 | 6.2 | 3.2 | -2.6 | -8.1 | -20.0 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.5 | 4.8 | 7.3 | 8.0 | 6.0 | 8.8 | 9.2 | 9.4 | 6.6 | 6.3 | 6.9 | 6.9 |
| Precipitation (mm) | 10 | 35 | 46 | 84 | 85 | 68 | 191 | 94 | 110 | 89 | 8 | 13 |
| Sunny days | 23 | 13 | 12 | 15 | 5 | 10 | 8 | 6 | 4 | 9 | 20 | 23 |
| Rainy days | 0 | 4 | 12 | 11 | 25 | 20 | 23 | 25 | 26 | 22 | 7 | 5 |
| Snow days | 8 | 11 | 7 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
The best time to visit Siwan during the most sunny months:
The largest precipitation sum in Siwan is at