Average annual temperature is 9.4 °C
Absolute maximum temperature: 33.5 °C
Absolute minimum temperature: -21.4 °C
Number of sunny days: 245 days
Number of rainy days: 109 days
Number of snow days: 11 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) | 10.3 | 8.6 | 19.8 | 28.5 | 29.1 | 30.7 | 33.5 | 30.5 | 27.9 | 20.8 | 21.7 | 14.3 |
| Average daytime temperature (°C) | 0.7 | 4.4 | 13.0 | 14.4 | 19.6 | 26.4 | 28.3 | 25.8 | 21.3 | 16.1 | 7.4 | 0.6 |
| Average temperature (°C) | -4.9 | -0.7 | 6.2 | 8.6 | 14.5 | 20.6 | 22.8 | 21.1 | 16.3 | 10.8 | 1.5 | -4.7 |
| Average night temperature (°C) | -10.2 | -5.0 | -0.3 | 3.8 | 10.2 | 15.2 | 17.7 | 16.8 | 12.4 | 6.7 | -3.4 | -9.4 |
| Absolute minimum temperature (°C) | -21.4 | -8.9 | -7.8 | -3.2 | 4.3 | 10.0 | 12.9 | 11.3 | 6.2 | 2.4 | -10.1 | -21.3 |
| 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) | 9.9 | 10.8 | 12.0 | 13.2 | 14.2 | 14.7 | 14.4 | 13.6 | 12.4 | 11.2 | 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) | 8.1 | 7.5 | 9.3 | 7.5 | 6.4 | 10.3 | 9.8 | 9.9 | 7.8 | 7.7 | 8.0 | 7.5 |
| Precipitation (mm) | 1 | 15 | 5 | 94 | 75 | 30 | 98 | 34 | 91 | 35 | 10 | 15 |
| Sunny days | 29 | 21 | 25 | 17 | 13 | 20 | 18 | 15 | 13 | 22 | 26 | 26 |
| Rainy days | 1 | 3 | 5 | 12 | 18 | 10 | 13 | 16 | 17 | 9 | 2 | 3 |
| Snow days | 1 | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 |
The largest precipitation sum in Siwan is at