Boulogne-sur-Mer Weather in September

September in Boulogne-sur-Mer sees daytime temperatures around 20°C (68°F) and lows of 13°C (55°F) at night. With around 75 mm (3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Boulogne-sur-Mer in September

Expect around 13 days of rain based on historical data, with 75 mm (3 in) average. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Boulogne-sur-Mer in September

September in Boulogne-sur-Mer is generally perfect, with days reaching 20°C (68°F) and nights settling around 13°C (55°F). This month falls in the summer season. The difference between afternoon and evening temperatures is usually noticeable. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Boulogne-sur-Mer in September

The city usually sees around 160 hours of sunlight, indicating a moderately sunny period.

If your ideal day consists of dry skies and pleasant temperatures, July, August and September typically offer the best circumstances for Boulogne-sur-Mer.

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For a detailed overview over the year and the best time to visit France, check out our Boulogne-sur-Mer's climate page.

Boulogne-sur-Mer Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 44%  

Precipitation 75 mm (3 in)  

Rainy days 13 days  

Humidity 85% *  

Sunshine 160 hours *  

Percentage Sunshine *  

* Data from: Abbeville, France (67 KM, 42 Miles).

What to Wear in Boulogne-sur-Mer in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Boulogne-sur-Mer in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit France, check out our Boulogne-sur-Mer's climate page.

More climate data for Boulogne-sur-Mer

Temperature Rainfall Sunshine Humidity

See the full Boulogne-sur-Mer climate overview or explore weather in France.