Average annual temperature is 9.3 °C
Absolute maximum temperature: 36.1 °C
Absolute minimum temperature: -18.4 °C
Number of sunny days: 281 days
Number of rainy days: 62 days
Number of snow days: 22 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) | 8.5 | 12.6 | 17.8 | 28.8 | 26.3 | 33.5 | 36.1 | 35.1 | 33.8 | 20.1 | 16.9 | 11.7 |
| Average daytime temperature (°C) | -3.1 | 3.3 | 11.5 | 13.5 | 20.5 | 27.5 | 29.0 | 27.8 | 23.7 | 15.8 | 5.7 | -0.5 |
| Average temperature (°C) | -7.6 | -1.6 | 5.7 | 8.1 | 15.0 | 21.9 | 23.4 | 22.2 | 17.9 | 10.2 | 0.9 | -5.0 |
| Average night temperature (°C) | -12.9 | -6.5 | -0.7 | 2.2 | 9.4 | 16.1 | 17.5 | 16.7 | 12.0 | 5.0 | -3.8 | -9.4 |
| Absolute minimum temperature (°C) | -18.4 | -9.3 | -4.6 | -4.7 | 3.4 | 8.3 | 11.6 | 12.6 | 5.1 | -0.5 | -8.1 | -17.9 |
| 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 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.1 | 9.5 |
| 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) | 8.5 | 8.2 | 10.0 | 8.2 | 8.0 | 9.5 | 10.4 | 8.8 | 9.4 | 8.5 | 8.4 | 7.5 |
| Precipitation (mm) | 0 | 5 | 0 | 14 | 14 | 18 | 42 | 20 | 6 | 18 | 4 | 5 |
| Sunny days | 30 | 19 | 30 | 16 | 22 | 20 | 23 | 22 | 25 | 21 | 27 | 26 |
| Rainy days | 0 | 0 | 0 | 9 | 9 | 10 | 8 | 9 | 5 | 10 | 1 | 1 |
| Snow days | 1 | 9 | 1 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The largest precipitation sum in Siwan is at