Average annual temperature is 17.6 °C
Absolute maximum temperature: 35.6 °C
Absolute minimum temperature: -7.5 °C
Number of sunny days: 139 days
Number of rainy days: 225 days
Number of snow days: 1 day
Look at detailed online map of Siyan
* Weather data for Siyan 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) | 23.3 | 22.6 | 25.5 | 32.2 | 35.0 | 32.5 | 35.6 | 33.3 | 32.4 | 27.4 | 29.3 | 24.8 |
| Average daytime temperature (°C) | 10.9 | 12.5 | 18.0 | 21.7 | 26.4 | 29.0 | 32.3 | 30.1 | 29.4 | 23.0 | 18.5 | 12.4 |
| Average temperature (°C) | 6.6 | 8.0 | 13.0 | 17.1 | 21.6 | 25.2 | 28.2 | 26.0 | 25.2 | 18.9 | 13.6 | 7.4 |
| Average night temperature (°C) | 2.6 | 4.1 | 8.8 | 13.6 | 17.8 | 22.2 | 25.0 | 22.9 | 21.6 | 15.2 | 9.1 | 3.2 |
| Absolute minimum temperature (°C) | -7.5 | -2.6 | 1.7 | 7.0 | 9.4 | 18.2 | 21.7 | 18.2 | 18.6 | 9.3 | 2.6 | -7.2 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 |
| Daylight mean duration (h) | 10.5 | 11.2 | 12.0 | 12.9 | 13.6 | 14.0 | 13.8 | 13.2 | 12.3 | 11.5 | 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) | 6.4 | 5.5 | 6.0 | 7.5 | 8.1 | 6.4 | 8.8 | 8.8 | 8.5 | 6.3 | 7.6 | 6.9 |
| Precipitation (mm) | 51 | 81 | 98 | 154 | 98 | 260 | 213 | 162 | 75 | 37 | 63 | 31 |
| Sunny days | 20 | 10 | 16 | 9 | 10 | 4 | 5 | 1 | 7 | 16 | 20 | 21 |
| Rainy days | 11 | 18 | 15 | 21 | 21 | 26 | 26 | 30 | 23 | 15 | 10 | 9 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The largest precipitation sum in Siyan is at