Climate
Climate in Boulogne-sur-Mer
Air temperature, 10 m wind, sunshine hours and rain, month by month. Averages 2016-2025. This is not a trip forecast.
The year
The air is 18 °C or warmer from July to August.
6°
Jan
6°
Feb
8°
Mar
10°
Apr
13°
May
16°
Jun
18°
Jul
18°
Aug
16°
Sep
13°
Oct
9°
Nov
7°
Dec
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Air (°C) | 5.5 | 6.4 | 7.7 | 9.8 | 12.9 | 16.2 | 18 | 18.3 | 16.4 | 13.3 | 9.3 | 7.1 |
| Sunshine (h) | 133 | 160 | 233 | 319 | 361 | 376 | 383 | 347 | 270 | 207 | 143 | 117 |
| Rain (mm) | 112 | 82 | 74 | 55 | 57 | 56 | 65 | 71 | 86 | 128 | 137 | 121 |
| Wind (kn) | 11.3 | 12.1 | 10.9 | 9.4 | 9.1 | 9.1 | 9 | 9.1 | 9.4 | 10.6 | 11.1 | 11.9 |
| Gusts (kn) | 29 | 30.2 | 28.1 | 25.4 | 25.3 | 25.2 | 25.5 | 25.3 | 25.4 | 27.9 | 28.4 | 29.6 |
| Sea (°C) | 7.6 | 8.1 | 8.9 | 11 | 13.7 | 17.2 | 19.9 | 20.7 | 19 | 16.2 | 12.8 | 9.7 |
Mean wind at 10 m, in knots. Gusts are the mean of each day's peak.
Sea temperature, averages 2022-2026. This is not the 2015-2024 series.
The seasons
Spring
March – May
10°·304 h·62 mm
9.8 kn·Sea 11°
Summer
June – August
18°·369 h·64 mm
9.1 kn·Sea 19°
Autumn
September – November
13°·207 h·117 mm
10.4 kn·Sea 16°
Winter
December – February
6°·137 h·105 mm
11.8 kn·Sea 8°
