Average annual temperature is 20.8 °C
Absolute maximum temperature: 37.7 °C
Absolute minimum temperature: -0.2 °C
Number of sunny days: 151 days
Number of rainy days: 214 days
Look at detailed online map of Boulogne
* Weather data for Boulogne United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 27.2 | 29.3 | 31.4 | 32.7 | 33.5 | 35.7 | 37.7 | 36.9 | 35.1 | 29.2 | 28.3 | 25.6 |
| Average daytime temperature (°C) | 21.0 | 24.4 | 25.2 | 27.6 | 28.8 | 31.5 | 34.7 | 33.7 | 31.1 | 25.9 | 21.4 | 18.4 |
| Average temperature (°C) | 14.3 | 17.7 | 18.5 | 21.0 | 22.6 | 25.4 | 28.1 | 27.8 | 24.9 | 20.4 | 16.0 | 13.3 |
| Average night temperature (°C) | 9.3 | 12.9 | 13.1 | 15.8 | 17.9 | 21.0 | 23.6 | 23.8 | 20.4 | 15.9 | 11.9 | 9.5 |
| Absolute minimum temperature (°C) | -0.2 | 2.6 | 2.7 | 9.6 | 11.5 | 17.3 | 21.9 | 21.8 | 16.9 | 7.9 | 1.9 | 0.3 |
| 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) | 10.4 | 11.1 | 12.0 | 12.9 | 13.7 | 14.1 | 13.9 | 13.2 | 12.4 | 11.4 | 10.6 | 10.2 |
| Daylight minimum duration (h) | 10.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 10.0 | 10.0 |
| Sunshine mean duration (h) | 8.1 | 8.8 | 9.1 | 9.5 | 10.4 | 10.6 | 11.4 | 11.1 | 10.5 | 9.1 | 6.8 | 7.0 |
| Precipitation (mm) | 29 | 51 | 53 | 122 | 134 | 166 | 128 | 125 | 90 | 41 | 76 | 145 |
| Sunny days | 18 | 20 | 15 | 8 | 10 | 3 | 4 | 5 | 14 | 21 | 15 | 18 |
| Rainy days | 13 | 8 | 16 | 22 | 21 | 27 | 27 | 26 | 16 | 10 | 15 | 13 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Boulogne is at