Average annual temperature is 10.0 °C
Absolute maximum temperature: 31.7 °C
Absolute minimum temperature: -18.4 °C
Number of sunny days: 222 days
Number of rainy days: 116 days
Number of snow days: 27 days
Look at detailed online map of Heyan
* Weather data for Heyan 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) | 11.3 | 12.2 | 19.1 | 26.0 | 28.2 | 30.5 | 31.7 | 30.9 | 29.5 | 19.6 | 19.3 | 13.1 |
| Average daytime temperature (°C) | 1.9 | 5.0 | 12.8 | 16.4 | 20.5 | 24.5 | 27.3 | 26.8 | 22.6 | 15.7 | 9.4 | 4.9 |
| Average temperature (°C) | -3.8 | -0.3 | 6.9 | 9.6 | 14.6 | 18.7 | 21.6 | 21.2 | 17.4 | 10.9 | 3.4 | -1.1 |
| Average night temperature (°C) | -9.4 | -5.6 | 0.7 | 3.1 | 8.9 | 13.3 | 16.3 | 15.9 | 12.8 | 6.5 | -2.0 | -6.6 |
| Absolute minimum temperature (°C) | -18.4 | -12.4 | -4.5 | -5.4 | 1.2 | 8.4 | 11.6 | 12.3 | 9.0 | 2.3 | -8.0 | -15.4 |
| 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) | 10.0 | 10.9 | 12.0 | 13.1 | 14.1 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 8.0 | 7.9 | 9.3 | 8.7 | 7.7 | 9.4 | 10.3 | 10.3 | 8.5 | 7.4 | 8.6 | 8.3 |
| Precipitation (mm) | 3 | 17 | 6 | 31 | 55 | 85 | 60 | 75 | 126 | 135 | 3 | 2 |
| Sunny days | 26 | 17 | 22 | 17 | 12 | 17 | 20 | 15 | 10 | 14 | 24 | 28 |
| Rainy days | 0 | 1 | 6 | 11 | 19 | 13 | 11 | 16 | 20 | 17 | 2 | 0 |
| Snow days | 5 | 10 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 3 |
The largest precipitation sum in Heyan is at