Norwalk weather in September 2025

The weather in Norwalk in September is hot. The average temperatures are between 20°C and 27°C.

As it is almost never rain during September in Norwalk the weather is perfect for hanging out outside and exploring all that Norwalk has to offer.

Our weather forecast can give you a great sense of what weather to expect in Norwalk in September 2025.

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

Temperatures

27° / 20°

Rainy Days

Snowy Days

Dry Days

Rainfall

Sun Hours

11.9

Hrs

Sun	Mon	Tue	Wed	Thu	Fri	Sat
	1 31° /21°	2 29° /21°	3 30° /21°	4 31° /22°	5 33° /23°	6 33° /23°
7 34° /23°	8 35° /24°	9 36° /25°	10 30° /23°	11 30° /22°	12 29° /20°	13 28° /20°
14 27° /19°	15 26° /19°	16 25° /18°	17 25° /18°	18 25° /18°	19 25° /18°	20 26° /18°
21 26° /18°	22 29° /19°	23 31° /20°	24 27° /16°	25 29° /18°	26 27° /18°	27 29° /18°
28 28° /19°	29 28° /18°	30 27° /18°

Explore the weather in Norwalk in other months

Norwalk annual weather

Month	Temperatures	Rainy Days	Dry Days	Rainfall	Weather	More details
January	20° / 12°	2	29	26 mm	Good	Norwalk in January
February	19° / 12°	2	27	24 mm	Good	Norwalk in February
March	20° / 13°	1	30	15 mm	Good	Norwalk in March
April	21° / 14°	0	30	7 mm	Good	Norwalk in April
May	21° / 15°	0	31	4 mm	Good	Norwalk in May
June	23° / 17°	0	30	2 mm	Perfect	Norwalk in June
July	26° / 19°	0	31	8 mm	Perfect	Norwalk in July
August	27° / 20°	0	31	6 mm	Perfect	Norwalk in August
September	27° / 20°	0	30	6 mm	Perfect	Norwalk in September
October	25° / 18°	1	30	9 mm	Perfect	Norwalk in October
November	22° / 15°	1	29	11 mm	Good	Norwalk in November
December	19° / 12°	2	29	28 mm	Good	Norwalk in December