Average annual temperature is 16.6 °C
Absolute maximum temperature: 35.1 °C
Absolute minimum temperature: -3.5 °C
Number of sunny days: 109 days
Number of rainy days: 253 days
Number of snow days: 3 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) | 14.2 | 17.5 | 23.0 | 29.7 | 30.7 | 32.1 | 35.1 | 31.8 | 29.7 | 24.5 | 23.1 | 16.8 |
| Average daytime temperature (°C) | 9.5 | 12.4 | 16.7 | 21.5 | 24.1 | 27.6 | 30.1 | 28.3 | 25.7 | 20.4 | 17.0 | 11.7 |
| Average temperature (°C) | 5.2 | 9.2 | 13.1 | 17.4 | 20.2 | 23.3 | 25.7 | 24.6 | 22.3 | 17.4 | 13.1 | 7.6 |
| Average night temperature (°C) | 0.8 | 6.3 | 9.3 | 12.9 | 16.7 | 19.5 | 21.9 | 21.6 | 19.7 | 14.8 | 9.5 | 3.2 |
| Absolute minimum temperature (°C) | -3.5 | 2.7 | 4.0 | 5.8 | 12.7 | 16.6 | 17.5 | 17.9 | 17.3 | 11.2 | 4.8 | -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) | 10.5 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.3 | 11.4 | 10.7 | 10.2 |
| 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 | 3.3 | 4.6 | 6.7 | 6.1 | 6.3 | 8.2 | 7.6 | 6.3 | 4.5 | 5.1 | 6.0 |
| Precipitation (mm) | 7 | 28 | 62 | 126 | 79 | 32 | 183 | 317 | 136 | 88 | 34 | 7 |
| Sunny days | 21 | 7 | 7 | 7 | 8 | 12 | 11 | 3 | 1 | 4 | 13 | 15 |
| Rainy days | 7 | 21 | 24 | 23 | 23 | 18 | 20 | 28 | 29 | 27 | 17 | 16 |
| Snow days | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Siyan during the most sunny months:
The largest precipitation sum in Siyan is at