United States weather in September 2025

The temperatures in the United States in September are comfortable with low of 17°C and and high up to 24°C.

You can expect about 3 to 8 days of rain in the United States 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 United States in September 2025.

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

Temperatures

24° / 17°

Rainy Days

Snowy Days

Dry Days

Rainfall

128

Sun Hours

10.3

Hrs

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

Explore the weather in the United States in other months

United States annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	1° / -4°	6	16	9	119 mm	Awful	United States in January
February	3° / -3°	8	11	10	136 mm	Awful	United States in February
March	7° / 1°	8	17	7	149 mm	Awful	United States in March
April	13° / 6°	8	21	1	141 mm	Bad	United States in April
May	20° / 12°	8	23	0	137 mm	Ok	United States in May
June	25° / 17°	8	22	0	161 mm	Good	United States in June
July	28° / 20°	10	21	0	201 mm	Good	United States in July
August	28° / 20°	7	24	0	183 mm	Good	United States in August
September	24° / 17°	6	24	0	128 mm	Perfect	United States in September
October	17° / 11°	7	24	0	160 mm	Ok	United States in October
November	10° / 5°	6	23	1	108 mm	Ok	United States in November
December	5° / 1°	7	17	7	166 mm	Awful	United States in December

Temperatures in the United States in September

Rain in the United States in September

Weather in the United States in September - FAQ

What is the average temperature in the United States in September?

The average temperature in the United States in September is 17/24° C.

What is the chance of rain in the United States in September?

On average, there are 6 rainy days in the United States during September.

Weather wise, is September a good time to visit United States?

The weather in the United States in September is perfect.

Can it snow in the United States in September?

On average, there are 0 snowy days in the United States in September.

Cities in the United States

For a more accurate weather forecast please select a city

Atlanta Austin Chicago Dallas Houston Los Angeles New York City Orlando Philadelphia San Francisco

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More about the weather in the United States