Boulogne Sur Mer weather in September 2026

The temperatures in Boulogne Sur Mer in September are usually low and can range between 13°C and 18°C.

You can expect about 3 to 8 days of rain in Boulogne Sur Mer during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Boulogne Sur Mer in September 2026.

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

18° / 13°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

9.4

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
		1 21° /15°	2 21° /15°	3 20° /14°	4 20° /14°	5 21° /15°
6 22° /16°	7 23° /16°	8 21° /17°	9 20° /16°	10 19° /15°	11 17° /14°	12 18° /13°
13 18° /13°	14 18° /13°	15 18° /13°	16 18° /14°	17 19° /14°	18 18° /15°	19 19° /14°
20 19° /13°	21 17° /12°	22 17° /12°	23 16° /12°	24 16° /12°	25 16° /12°	26 17° /12°
27 15° /11°	28 15° /11°	29 15° /10°	30 15° /11°

Explore the weather in Boulogne Sur Mer in other months

Boulogne Sur Mer annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	7° / 4°	10	17	4	122 mm	Awful	Boulogne Sur Mer in January
February	7° / 4°	9	16	3	103 mm	Awful	Boulogne Sur Mer in February
March	10° / 5°	7	23	1	83 mm	Bad	Boulogne Sur Mer in March
April	12° / 7°	4	26	0	59 mm	Ok	Boulogne Sur Mer in April
May	15° / 9°	5	26	0	81 mm	Good	Boulogne Sur Mer in May
June	17° / 12°	6	24	0	102 mm	Good	Boulogne Sur Mer in June
July	19° / 14°	6	25	0	91 mm	Good	Boulogne Sur Mer in July
August	20° / 15°	6	25	0	114 mm	Good	Boulogne Sur Mer in August
September	18° / 13°	5	25	0	88 mm	Good	Boulogne Sur Mer in September
October	15° / 11°	8	23	0	128 mm	Ok	Boulogne Sur Mer in October
November	11° / 8°	9	20	0	142 mm	Bad	Boulogne Sur Mer in November
December	8° / 6°	10	19	2	151 mm	Awful	Boulogne Sur Mer in December