Average annual temperature is 12.0 °C
Absolute maximum temperature: 30.9 °C
Absolute minimum temperature: -3.9 °C
Number of sunny days: 107 days
Number of rainy days: 258 days
Look at detailed online map of Boulogne-sur-Mer
* Weather data for Boulogne-sur-Mer 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) | 12.4 | 11.9 | 16.2 | 15.9 | 20.9 | 29.3 | 26.5 | 26.1 | 30.9 | 24.4 | 15.1 | 12.9 |
| Average daytime temperature (°C) | 8.3 | 8.4 | 9.7 | 11.5 | 14.8 | 20.9 | 19.4 | 19.5 | 22.0 | 16.3 | 11.1 | 9.8 |
| Average temperature (°C) | 6.5 | 6.2 | 7.5 | 8.6 | 12.0 | 17.3 | 17.4 | 17.3 | 18.6 | 14.2 | 9.5 | 8.3 |
| Average night temperature (°C) | 4.6 | 4.0 | 5.1 | 5.4 | 9.0 | 13.8 | 15.3 | 14.9 | 15.5 | 12.3 | 7.8 | 6.7 |
| Absolute minimum temperature (°C) | -3.9 | -1.9 | -1.6 | 0.5 | 4.6 | 10.5 | 12.4 | 12.7 | 11.4 | 4.6 | 0.9 | -2.8 |
| 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) | 8.5 | 10.0 | 11.9 | 13.8 | 15.5 | 16.4 | 16.0 | 14.5 | 12.6 | 10.7 | 9.0 | 8.1 |
| 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 | 7.0 |
| Sunshine mean duration (h) | 4.1 | 5.3 | 5.2 | 9.0 | 11.5 | 13.2 | 11.6 | 11.0 | 9.3 | 6.5 | 3.5 | 2.8 |
| Precipitation (mm) | 148 | 21 | 178 | 96 | 35 | 13 | 110 | 124 | 65 | 214 | 274 | 147 |
| Sunny days | 7 | 10 | 2 | 10 | 17 | 22 | 2 | 6 | 15 | 8 | 4 | 4 |
| Rainy days | 24 | 18 | 29 | 20 | 14 | 8 | 29 | 25 | 15 | 23 | 26 | 27 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Boulogne-sur-Mer during the most sunny months:
Months with the longest average daylight duration in Boulogne-sur-Mer:
The largest precipitation sum in Boulogne-sur-Mer is at