Average annual temperature is 12.2 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: -4.9 °C
Number of sunny days: 125 days
Number of rainy days: 240 days
Look at detailed online map of Heilly
* Weather data for Heilly France is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 14.6 | 12.5 | 18.0 | 17.4 | 23.5 | 30.5 | 30.0 | 28.5 | 32.4 | 25.5 | 16.2 | 12.7 |
| Average daytime temperature (°C) | 7.9 | 9.1 | 11.4 | 12.9 | 18.1 | 24.9 | 23.2 | 22.7 | 24.0 | 18.0 | 11.0 | 9.3 |
| Average temperature (°C) | 5.5 | 5.5 | 8.1 | 8.9 | 13.3 | 19.5 | 18.8 | 18.4 | 18.9 | 13.7 | 8.4 | 7.2 |
| Average night temperature (°C) | 2.8 | 2.2 | 4.5 | 4.7 | 8.7 | 13.7 | 14.3 | 13.9 | 14.1 | 10.0 | 5.8 | 4.9 |
| Absolute minimum temperature (°C) | -3.9 | -4.4 | -2.4 | -1.4 | 4.4 | 9.5 | 10.2 | 9.8 | 7.7 | 3.1 | 0.5 | -4.9 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 16.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 |
| Daylight mean duration (h) | 8.6 | 10.1 | 11.9 | 13.8 | 15.4 | 16.3 | 15.9 | 14.4 | 12.6 | 10.8 | 9.1 | 8.2 |
| Daylight minimum duration (h) | 8.0 | 9.0 | 10.0 | 12.0 | 14.0 | 16.0 | 15.0 | 13.0 | 11.0 | 9.0 | 8.0 | 8.0 |
| Sunshine mean duration (h) | 2.9 | 5.5 | 5.3 | 8.0 | 10.6 | 12.9 | 10.9 | 10.7 | 9.1 | 6.5 | 3.7 | 2.6 |
| Precipitation (mm) | 78 | 8 | 108 | 104 | 51 | 47 | 125 | 87 | 55 | 88 | 127 | 71 |
| Sunny days | 7 | 17 | 5 | 9 | 17 | 19 | 4 | 7 | 16 | 14 | 5 | 5 |
| Rainy days | 24 | 11 | 26 | 21 | 14 | 11 | 27 | 24 | 14 | 17 | 25 | 26 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Heilly during the most sunny months:
Months with the longest average daylight duration in Heilly:
The largest precipitation sum in Heilly is at