Boulogne-sur-Mer Weather in December
What's the weather like in Boulogne-sur-Mer (Nord-Pas-de-Calais) in December 2025?
The climate in Boulogne-sur-Mer during December can be summarized as cool and reasonably dry.
December is in the winter in Boulogne-sur-Mer and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 7°C (45°F), whilst at night 3°C (37°F) is normal.
| Daytime temperature | 7.4°C 45.2°F |
|---|---|
| Nightly temperature | 2.7°C 36.8°F |
| Average temperature | 5°C 41°F |
| Daily sunshine | 2 hrs |
| Avg rainfall | 70 mm 2.7 ins |
| Rainy days | 16 days |
| Sea temperature | 10.5°C 50.9°F |
| Humidity | 90% |
| Windspeed | 19.1kph 12 mph |
On average December is the 3rd wettest month of the year in Boulogne-sur-Mer with around 70mm 2.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 2 hours of sunshine per day.
December temperatures in Boulogne-sur-Mer
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Boulogne-sur-Mer in December 2025.
Other monthly averages
Best places to visit in December
Boulogne-sur-Mer weather stats
| Hottest month: | August | 20.3°C 68.5°F |
|---|---|---|
| Driest month: | February | 47mm 1.9ins |
| Sunniest month: | August | 7.6hrs |
| Coldest month: | January | 6.2°C 43.2°F |
| Wettest month: | November | 93mm 3.7ins |
© Google
Locations nearby
Top France locations
- Biarritz
- Bordeaux
- Cannes
- Carcassonne
- La Rochelle
- Lourdes
- Lyon
- Marseille
- Montpellier
- Nice
- Paris
- Toulouse