Average annual temperature is 15.6 °C
Absolute maximum temperature: 32.6 °C
Absolute minimum temperature: -4.7 °C
Number of sunny days: 106 days
Number of rainy days: 255 days
Number of snow days: 4 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) | 16.4 | 15.6 | 23.1 | 28.7 | 28.3 | 30.7 | 31.5 | 32.6 | 30.6 | 24.1 | 23.0 | 17.1 |
| Average daytime temperature (°C) | 8.7 | 10.5 | 15.5 | 21.0 | 23.0 | 25.2 | 28.6 | 28.9 | 25.6 | 19.7 | 15.8 | 10.5 |
| Average temperature (°C) | 4.3 | 6.9 | 11.2 | 16.1 | 19.4 | 22.1 | 24.9 | 24.8 | 21.9 | 16.3 | 11.7 | 6.8 |
| Average night temperature (°C) | -0.4 | 2.9 | 6.9 | 11.7 | 16.1 | 18.9 | 21.4 | 20.8 | 18.5 | 12.9 | 7.8 | 2.9 |
| Absolute minimum temperature (°C) | -4.7 | 0.3 | 3.8 | 6.1 | 10.8 | 14.9 | 17.3 | 16.1 | 15.0 | 7.1 | 2.3 | -3.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 5.4 | 3.2 | 4.5 | 7.1 | 6.6 | 6.2 | 9.0 | 10.1 | 6.9 | 5.8 | 5.9 | 5.3 |
| Precipitation (mm) | 29 | 39 | 76 | 133 | 232 | 246 | 230 | 226 | 253 | 183 | 93 | 40 |
| Sunny days | 17 | 9 | 5 | 9 | 7 | 3 | 3 | 7 | 5 | 9 | 14 | 18 |
| Rainy days | 11 | 19 | 26 | 21 | 24 | 27 | 28 | 24 | 25 | 22 | 16 | 12 |
| Snow days | 3 | 0 | 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