Average annual temperature is 16.2 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: -8.3 °C
Number of sunny days: 232 days
Number of rainy days: 131 days
Number of snow days: 2 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) | 15.7 | 18.6 | 28.9 | 29.8 | 35.1 | 37.9 | 37.6 | 36.1 | 32.0 | 28.0 | 28.7 | 21.8 |
| Average daytime temperature (°C) | 8.3 | 10.7 | 19.2 | 21.2 | 26.2 | 32.0 | 33.1 | 31.9 | 27.3 | 23.5 | 15.2 | 7.4 |
| Average temperature (°C) | 2.3 | 5.4 | 12.9 | 15.9 | 21.3 | 26.5 | 28.5 | 27.3 | 23.1 | 18.0 | 10.0 | 2.2 |
| Average night temperature (°C) | -2.9 | 0.0 | 7.2 | 11.1 | 16.9 | 21.7 | 24.5 | 23.2 | 19.2 | 13.3 | 4.9 | -2.3 |
| Absolute minimum temperature (°C) | -7.4 | -3.9 | 1.5 | 4.0 | 10.9 | 14.9 | 21.9 | 16.9 | 13.8 | 7.5 | -3.2 | -8.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 |
| Daylight mean duration (h) | 10.2 | 11.0 | 12.0 | 13.0 | 13.9 | 14.4 | 14.2 | 13.4 | 12.4 | 11.3 | 10.4 | 9.9 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 9.0 |
| Sunshine mean duration (h) | 7.4 | 6.6 | 8.1 | 8.1 | 6.9 | 8.2 | 9.4 | 9.9 | 7.2 | 7.5 | 6.9 | 6.8 |
| Precipitation (mm) | 15 | 24 | 11 | 82 | 91 | 80 | 232 | 169 | 113 | 20 | 26 | 30 |
| Sunny days | 28 | 20 | 27 | 20 | 13 | 15 | 11 | 17 | 12 | 23 | 22 | 24 |
| Rainy days | 3 | 7 | 4 | 10 | 18 | 15 | 20 | 14 | 18 | 8 | 8 | 6 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
The best time to visit Heyan during the most sunny months:
The largest precipitation sum in Heyan is at