Average annual temperature is 17.4 °C
Absolute maximum temperature: 32.9 °C
Absolute minimum temperature: -4.1 °C
Number of sunny days: 103 days
Number of rainy days: 259 days
Number of snow days: 3 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) | 22.5 | 18.8 | 23.6 | 27.5 | 32.0 | 31.0 | 32.9 | 32.6 | 32.3 | 30.5 | 28.2 | 24.8 |
| Average daytime temperature (°C) | 11.7 | 10.5 | 16.3 | 21.3 | 25.3 | 28.0 | 31.2 | 29.5 | 28.5 | 23.5 | 18.5 | 12.6 |
| Average temperature (°C) | 7.1 | 7.1 | 12.3 | 17.4 | 21.5 | 24.4 | 27.4 | 25.8 | 24.2 | 19.1 | 14.1 | 8.4 |
| Average night temperature (°C) | 2.7 | 3.8 | 8.6 | 14.0 | 18.1 | 21.4 | 24.2 | 22.6 | 20.6 | 15.6 | 10.4 | 3.9 |
| Absolute minimum temperature (°C) | -2.6 | -1.7 | 3.6 | 6.1 | 12.0 | 17.7 | 22.1 | 17.6 | 17.1 | 11.6 | 3.1 | -4.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.7 | 11.3 | 12.0 | 12.8 | 13.5 | 13.8 | 13.6 | 13.1 | 12.3 | 11.5 | 10.9 | 10.5 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 6.0 | 3.0 | 4.2 | 6.0 | 7.8 | 8.0 | 11.0 | 9.6 | 8.7 | 6.4 | 5.3 | 5.9 |
| Precipitation (mm) | 24 | 89 | 121 | 183 | 169 | 197 | 97 | 184 | 91 | 34 | 64 | 37 |
| Sunny days | 21 | 6 | 5 | 6 | 5 | 5 | 3 | 2 | 4 | 15 | 14 | 17 |
| Rainy days | 9 | 21 | 26 | 24 | 26 | 25 | 28 | 29 | 26 | 16 | 16 | 13 |
| Snow days | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Siwan during the most sunny months:
The largest precipitation sum in Siwan is at