Average annual temperature is 10.5 °C
Absolute maximum temperature: 32.3 °C
Absolute minimum temperature: -17.4 °C
Number of sunny days: 189 days
Number of rainy days: 153 days
Number of snow days: 23 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 | 11.1 | 17.9 | 27.0 | 26.6 | 30.3 | 32.3 | 30.8 | 29.5 | 19.9 | 15.9 | 12.4 |
| Average daytime temperature (°C) | 2.0 | 5.8 | 12.7 | 16.6 | 20.1 | 25.4 | 28.2 | 27.6 | 22.9 | 15.7 | 10.2 | 5.1 |
| Average temperature (°C) | -3.1 | 1.0 | 6.6 | 10.4 | 14.7 | 19.6 | 22.1 | 21.7 | 17.7 | 10.9 | 4.6 | -0.4 |
| Average night temperature (°C) | -8.0 | -3.2 | 0.8 | 4.0 | 9.7 | 13.7 | 16.6 | 16.4 | 13.6 | 6.4 | -0.5 | -4.9 |
| Absolute minimum temperature (°C) | -17.4 | -10.5 | -3.9 | -5.0 | 4.6 | 9.3 | 12.2 | 10.7 | 8.0 | 1.5 | -4.5 | -11.0 |
| 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 | 10.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 6.9 | 5.8 | 7.5 | 7.4 | 6.5 | 9.3 | 9.8 | 10.1 | 7.4 | 6.7 | 7.5 | 7.7 |
| Precipitation (mm) | 10 | 23 | 31 | 66 | 89 | 51 | 120 | 94 | 100 | 75 | 2 | 3 |
| Sunny days | 22 | 17 | 15 | 16 | 11 | 15 | 13 | 12 | 7 | 13 | 23 | 25 |
| Rainy days | 1 | 4 | 15 | 13 | 20 | 15 | 18 | 19 | 23 | 18 | 3 | 4 |
| Snow days | 8 | 7 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 2 |
The best time to visit Siwan during the most sunny months:
The largest precipitation sum in Siwan is at