Average annual temperature is 5.9 °C
Absolute maximum temperature: 29.1 °C
Absolute minimum temperature: -32.8 °C
Number of sunny days: 225 days
Number of rainy days: 118 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) | 6.0 | 7.5 | 15.5 | 21.9 | 25.5 | 27.4 | 29.1 | 27.3 | 23.4 | 16.9 | 17.1 | 8.9 |
| Average daytime temperature (°C) | -3.4 | 0.4 | 8.2 | 9.8 | 16.8 | 23.0 | 24.2 | 22.6 | 18.1 | 13.1 | 2.8 | -4.8 |
| Average temperature (°C) | -8.4 | -4.8 | 2.4 | 4.8 | 11.8 | 17.5 | 19.4 | 17.9 | 13.4 | 8.0 | -2.3 | -9.5 |
| Average night temperature (°C) | -13.9 | -9.1 | -3.2 | -0.1 | 6.8 | 11.4 | 14.5 | 13.6 | 8.8 | 2.8 | -7.1 | -14.4 |
| Absolute minimum temperature (°C) | -32.8 | -13.9 | -11.1 | -5.8 | 0.3 | 5.3 | 11.9 | 7.2 | 2.8 | -2.9 | -15.3 | -27.2 |
| 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 | 10.8 | 12.0 | 13.2 | 14.3 | 14.8 | 14.6 | 13.6 | 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) | 8.3 | 8.3 | 10.0 | 8.1 | 8.0 | 12.1 | 9.9 | 9.9 | 8.5 | 8.9 | 8.2 | 7.6 |
| Precipitation (mm) | 8 | 14 | 22 | 90 | 55 | 52 | 196 | 128 | 80 | 10 | 9 | 19 |
| Sunny days | 28 | 23 | 23 | 16 | 12 | 17 | 15 | 6 | 10 | 24 | 25 | 26 |
| Rainy days | 0 | 0 | 5 | 9 | 19 | 13 | 16 | 25 | 20 | 7 | 2 | 2 |
| Snow days | 3 | 5 | 3 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 |
The best time to visit Siwan during the most sunny months:
The largest precipitation sum in Siwan is at