Average annual temperature is 9.4 °C
Absolute maximum temperature: 33.2 °C
Absolute minimum temperature: -25.5 °C
Number of sunny days: 257 days
Number of rainy days: 93 days
Number of snow days: 15 days
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) | 5.6 | 9.5 | 19.1 | 28.4 | 29.6 | 33.2 | 33.1 | 31.8 | 29.2 | 20.4 | 20.8 | 10.9 |
| Average daytime temperature (°C) | -1.9 | 4.1 | 11.8 | 14.9 | 22.4 | 28.3 | 28.5 | 27.7 | 23.4 | 16.9 | 4.9 | -2.1 |
| Average temperature (°C) | -7.0 | -1.0 | 5.2 | 8.9 | 16.3 | 22.1 | 23.2 | 22.1 | 18.1 | 11.3 | -0.2 | -6.8 |
| Average night temperature (°C) | -12.2 | -5.7 | -0.8 | 3.4 | 11.0 | 15.7 | 18.2 | 17.2 | 13.1 | 5.9 | -4.5 | -11.8 |
| Absolute minimum temperature (°C) | -25.5 | -10.1 | -8.4 | -4.0 | 4.6 | 8.7 | 12.4 | 10.2 | 5.3 | -1.0 | -12.9 | -24.7 |
| 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 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.8 | 10.7 | 12.0 | 13.2 | 14.3 | 14.9 | 14.6 | 13.7 | 12.4 | 11.2 | 10.0 | 9.5 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.8 | 7.9 | 9.5 | 6.9 | 8.1 | 11.5 | 9.5 | 9.8 | 8.9 | 8.3 | 7.6 | 7.2 |
| Precipitation (mm) | 6 | 15 | 7 | 83 | 48 | 26 | 121 | 66 | 33 | 18 | 4 | 16 |
| Sunny days | 28 | 20 | 26 | 15 | 12 | 25 | 19 | 15 | 22 | 26 | 25 | 24 |
| Rainy days | 3 | 1 | 5 | 13 | 19 | 5 | 12 | 16 | 8 | 5 | 3 | 3 |
| Snow days | 0 | 7 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 4 |
The best time to visit Siyan during the most sunny months:
The largest precipitation sum in Siyan is at