Average annual temperature is 18.5 °C
Absolute maximum temperature: 38.2 °C
Absolute minimum temperature: -1.6 °C
Number of sunny days: 140 days
Number of rainy days: 223 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) | 16.4 | 19.0 | 23.5 | 35.7 | 34.8 | 36.2 | 38.2 | 35.0 | 34.9 | 25.4 | 24.1 | 17.6 |
| Average daytime temperature (°C) | 10.9 | 14.3 | 18.6 | 24.6 | 27.9 | 29.8 | 32.3 | 31.3 | 29.0 | 22.1 | 18.4 | 12.8 |
| Average temperature (°C) | 6.6 | 10.7 | 14.2 | 19.5 | 23.0 | 25.2 | 27.7 | 27.2 | 24.8 | 18.6 | 14.6 | 9.0 |
| Average night temperature (°C) | 2.9 | 7.3 | 10.2 | 14.8 | 18.7 | 21.2 | 23.8 | 23.5 | 21.3 | 15.5 | 11.0 | 5.1 |
| Absolute minimum temperature (°C) | -1.6 | 3.6 | 6.0 | 8.7 | 14.2 | 17.0 | 19.4 | 20.0 | 18.5 | 12.0 | 6.7 | 0.1 |
| 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 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.1 | 12.0 | 12.9 | 13.7 | 14.0 | 13.9 | 13.2 | 12.3 | 11.4 | 10.7 | 10.3 |
| 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) | 4.9 | 4.3 | 5.8 | 8.1 | 7.3 | 6.6 | 8.5 | 8.8 | 7.3 | 4.4 | 4.5 | 4.3 |
| Precipitation (mm) | 4 | 21 | 62 | 139 | 71 | 55 | 286 | 204 | 77 | 97 | 34 | 6 |
| Sunny days | 21 | 10 | 6 | 12 | 7 | 11 | 12 | 7 | 9 | 7 | 15 | 23 |
| Rainy days | 8 | 18 | 25 | 18 | 24 | 19 | 19 | 24 | 21 | 24 | 15 | 8 |
| Snow days | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Siwan during the most sunny months:
The largest precipitation sum in Siwan is at