Average annual temperature is 9.7 °C
Absolute maximum temperature: 33.7 °C
Absolute minimum temperature: -20.6 °C
Number of sunny days: 242 days
Number of rainy days: 110 days
Number of snow days: 13 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) | 12.3 | 11.6 | 21.2 | 28.8 | 30.2 | 30.6 | 33.7 | 31.0 | 27.3 | 22.9 | 23.4 | 16.0 |
| Average daytime temperature (°C) | 2.4 | 5.4 | 13.6 | 15.2 | 21.0 | 26.6 | 28.9 | 26.1 | 22.1 | 18.2 | 8.8 | 1.4 |
| Average temperature (°C) | -3.6 | -0.5 | 6.2 | 9.1 | 15.3 | 20.5 | 23.3 | 20.9 | 16.6 | 11.1 | 2.1 | -4.7 |
| Average night temperature (°C) | -9.3 | -4.9 | -0.4 | 3.7 | 9.8 | 14.0 | 17.7 | 16.1 | 11.5 | 4.9 | -2.8 | -9.5 |
| Absolute minimum temperature (°C) | -20.6 | -8.7 | -5.8 | -3.7 | 2.0 | 9.7 | 13.5 | 9.7 | 4.5 | -0.4 | -8.3 | -18.8 |
| 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 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.7 | 14.4 | 13.5 | 12.4 | 11.2 | 10.2 | 9.7 |
| 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) | 8.1 | 7.8 | 9.6 | 7.9 | 7.6 | 11.5 | 10.3 | 9.8 | 8.1 | 8.3 | 7.8 | 7.5 |
| Precipitation (mm) | 4 | 13 | 3 | 89 | 79 | 39 | 154 | 102 | 71 | 6 | 13 | 22 |
| Sunny days | 28 | 21 | 27 | 16 | 14 | 21 | 17 | 10 | 13 | 25 | 24 | 26 |
| Rainy days | 1 | 1 | 2 | 14 | 17 | 9 | 14 | 21 | 17 | 6 | 5 | 3 |
| Snow days | 2 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
The best time to visit Heyan during the most sunny months:
The largest precipitation sum in Heyan is at