Average annual temperature is 7.6 °C
Absolute maximum temperature: 29.2 °C
Absolute minimum temperature: -18.4 °C
Number of sunny days: 190 days
Number of rainy days: 144 days
Number of snow days: 31 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) | 10.2 | 7.3 | 16.6 | 23.5 | 25.1 | 26.8 | 29.2 | 28.0 | 27.1 | 17.5 | 16.4 | 11.2 |
| Average daytime temperature (°C) | -0.3 | 2.9 | 10.2 | 13.3 | 17.8 | 22.8 | 24.8 | 24.4 | 20.1 | 13.5 | 7.3 | 2.4 |
| Average temperature (°C) | -6.3 | -2.4 | 4.0 | 7.2 | 12.2 | 16.9 | 19.1 | 18.8 | 15.1 | 8.4 | 1.4 | -3.5 |
| Average night temperature (°C) | -11.5 | -7.1 | -1.7 | 1.4 | 7.2 | 11.4 | 14.0 | 13.8 | 11.2 | 4.2 | -3.2 | -8.0 |
| Absolute minimum temperature (°C) | -18.4 | -15.1 | -6.6 | -6.1 | 0.9 | 6.9 | 9.1 | 7.0 | 6.2 | -0.5 | -7.1 | -16.2 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.7 | 6.6 | 8.4 | 8.1 | 7.3 | 9.2 | 10.3 | 9.9 | 7.9 | 7.3 | 8.2 | 7.9 |
| Precipitation (mm) | 5 | 24 | 16 | 41 | 56 | 72 | 90 | 46 | 103 | 69 | 5 | 5 |
| Sunny days | 25 | 15 | 17 | 13 | 11 | 16 | 12 | 13 | 5 | 12 | 24 | 27 |
| Rainy days | 1 | 2 | 8 | 13 | 20 | 14 | 19 | 18 | 25 | 19 | 2 | 3 |
| Snow days | 5 | 11 | 6 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 1 |
The best time to visit Siwan during the most sunny months:
The largest precipitation sum in Siwan is at