Average annual temperature is 11.3 °C
Absolute maximum temperature: 40.0 °C
Absolute minimum temperature: -24.4 °C
Number of sunny days: 312 days
Number of rainy days: 37 days
Number of snow days: 16 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) | 5.0 | 11.4 | 20.8 | 31.1 | 32.2 | 38.1 | 40.0 | 39.1 | 35.6 | 22.1 | 20.0 | 9.2 |
| Average daytime temperature (°C) | -3.2 | 4.8 | 13.8 | 17.0 | 24.4 | 31.9 | 34.6 | 32.3 | 26.3 | 18.2 | 6.0 | -1.1 |
| Average temperature (°C) | -9.1 | -1.1 | 7.2 | 11.0 | 18.5 | 26.6 | 28.6 | 26.7 | 20.5 | 12.1 | 0.2 | -6.1 |
| Average night temperature (°C) | -15.2 | -8.2 | -1.5 | 3.4 | 11.5 | 19.8 | 21.5 | 19.5 | 13.2 | 5.4 | -5.9 | -12.0 |
| Absolute minimum temperature (°C) | -24.4 | -14.1 | -8.0 | -3.9 | 6.0 | 12.4 | 13.1 | 14.0 | 3.5 | 0.6 | -13.8 | -22.1 |
| 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 | 15.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.7 | 10.7 | 11.9 | 13.3 | 14.4 | 15.0 | 14.7 | 13.7 | 12.5 | 11.1 | 10.0 | 9.4 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.8 | 7.8 | 10.0 | 8.1 | 8.8 | 9.0 | 9.8 | 8.8 | 9.7 | 8.3 | 7.8 | 7.5 |
| Precipitation (mm) | 0 | 3 | 0 | 8 | 10 | 3 | 10 | 4 | 3 | 4 | 2 | 2 |
| Sunny days | 28 | 24 | 29 | 23 | 24 | 26 | 26 | 25 | 26 | 26 | 27 | 28 |
| Rainy days | 0 | 0 | 0 | 5 | 7 | 4 | 5 | 6 | 4 | 5 | 1 | 0 |
| Snow days | 3 | 4 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
The largest precipitation sum in Siwan is at