Bangor weather in September 2025

The temperatures in Bangor in September are comfortable with low of 10°C and and high up to 21°C.

You can expect about 3 to 8 days of rain in Bangor 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 Bangor in September 2025.

If you’re planning to visit Bangor in the near future, we highly recommend that you review the 14 day weather forecast for Bangor before you arrive.

Temperatures

21° / 10°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

9.9

Hrs

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

Explore the weather in Bangor in other months

Bangor annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-3° / -10°	6	9	15	124 mm	Awful	Bangor in January
February	-2° / -10°	7	6	17	116 mm	Awful	Bangor in February
March	3° / -5°	9	9	14	115 mm	Awful	Bangor in March
April	10° / 1°	10	16	5	142 mm	Awful	Bangor in April
May	17° / 6°	8	23	0	130 mm	Ok	Bangor in May
June	22° / 10°	8	22	0	146 mm	Ok	Bangor in June
July	26° / 14°	6	25	0	100 mm	Perfect	Bangor in July
August	25° / 13°	5	26	0	107 mm	Perfect	Bangor in August
September	21° / 10°	4	26	0	97 mm	Good	Bangor in September
October	14° / 5°	8	23	1	148 mm	Ok	Bangor in October
November	7° / -1°	7	17	6	129 mm	Awful	Bangor in November
December	0° / -6°	9	10	12	170 mm	Awful	Bangor in December