Average annual temperature is 16.3 °C
Absolute maximum temperature: 42.7 °C
Absolute minimum temperature: -7.5 °C
Number of sunny days: 242 days
Number of rainy days: 121 days
Number of snow days: 2 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) | 15.1 | 19.8 | 28.6 | 30.8 | 37.2 | 38.3 | 42.7 | 35.9 | 32.5 | 27.5 | 29.3 | 22.9 |
| Average daytime temperature (°C) | 7.9 | 11.1 | 20.2 | 22.3 | 26.5 | 31.8 | 35.4 | 31.2 | 27.2 | 23.0 | 15.1 | 7.6 |
| Average temperature (°C) | 2.3 | 5.4 | 13.5 | 16.3 | 21.3 | 26.5 | 29.8 | 26.8 | 23.0 | 17.6 | 9.5 | 2.4 |
| Average night temperature (°C) | -2.5 | 0.3 | 7.4 | 11.1 | 16.8 | 21.8 | 25.1 | 23.2 | 19.4 | 13.4 | 4.8 | -1.9 |
| Absolute minimum temperature (°C) | -7.4 | -3.7 | 1.4 | 4.8 | 11.1 | 15.7 | 23.1 | 16.7 | 13.6 | 9.6 | -3.2 | -7.5 |
| 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 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 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) | 7.2 | 6.9 | 8.6 | 8.1 | 7.3 | 8.9 | 9.5 | 9.5 | 7.2 | 7.4 | 7.0 | 6.9 |
| Precipitation (mm) | 10 | 16 | 17 | 66 | 97 | 43 | 135 | 196 | 111 | 27 | 24 | 53 |
| Sunny days | 28 | 23 | 28 | 20 | 15 | 17 | 18 | 16 | 11 | 19 | 24 | 23 |
| Rainy days | 2 | 5 | 3 | 10 | 16 | 13 | 13 | 15 | 19 | 12 | 6 | 7 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Siwan is at