The temperatures in Boulogne Sur Mer in December are quite cold with temperatures between 6°C and 8°C, warm clothes are a must.
You can expect rain for roughly half of the month of December in Boulogne Sur Mer. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Boulogne Sur Mer can expect a few days of snow in December.
Our weather forecast can give you a great sense of what weather to expect in Boulogne Sur Mer in December 2025.
If you’re planning to visit Boulogne Sur Mer in the near future, we highly recommend that you review the 14 day weather forecast for Boulogne Sur Mer before you arrive.
Temperatures
8° / 6°
Rainy Days
10
Snowy Days
2
Dry Days
19
Rainfall
151
mm
Sun Hours
6.7
Hrs
