Average annual temperature is 6.5 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: -21.3 °C
Number of sunny days: 196 days
Number of rainy days: 135 days
Number of snow days: 34 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) | 8.4 | 9.6 | 17.9 | 23.9 | 25.7 | 27.3 | 32.7 | 29.3 | 26.5 | 16.2 | 17.6 | 9.1 |
| Average daytime temperature (°C) | -1.5 | 1.9 | 9.8 | 12.5 | 17.3 | 22.7 | 25.7 | 24.4 | 19.5 | 12.2 | 5.9 | 1.2 |
| Average temperature (°C) | -7.9 | -4.2 | 2.8 | 5.6 | 11.3 | 16.3 | 19.3 | 18.3 | 13.9 | 6.5 | -0.4 | -4.8 |
| Average night temperature (°C) | -13.7 | -10.2 | -3.5 | -0.7 | 5.3 | 9.8 | 12.6 | 12.0 | 8.9 | 1.5 | -5.2 | -9.5 |
| Absolute minimum temperature (°C) | -21.3 | -16.8 | -8.6 | -8.7 | 0.3 | 5.4 | 7.8 | 7.0 | 4.4 | -2.6 | -9.0 | -17.3 |
| 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 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| 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) | 8.6 | 7.6 | 9.4 | 8.3 | 7.1 | 8.9 | 10.2 | 9.8 | 8.6 | 7.5 | 8.4 | 8.2 |
| Precipitation (mm) | 1 | 15 | 13 | 29 | 34 | 26 | 27 | 30 | 47 | 75 | 5 | 2 |
| Sunny days | 28 | 18 | 23 | 12 | 11 | 15 | 17 | 9 | 6 | 6 | 26 | 25 |
| Rainy days | 1 | 0 | 4 | 9 | 20 | 15 | 14 | 22 | 24 | 24 | 1 | 1 |
| Snow days | 2 | 10 | 4 | 9 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 5 |
The largest precipitation sum in Siwan is at