Pittsburgh weather in September 2025

The temperatures in Pittsburgh in September are comfortable with low of 14°C and and high up to 25°C.

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

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

Temperatures

25° / 14°

Rainy Days

Snowy Days

Dry Days

Rainfall

146

Sun Hours

10.4

Hrs

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

Explore the weather in Pittsburgh in other months

Pittsburgh annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	1° / -6°	8	5	19	127 mm	Awful	Pittsburgh in January
February	3° / -5°	9	5	16	138 mm	Awful	Pittsburgh in February
March	9° / 0°	9	13	9	136 mm	Awful	Pittsburgh in March
April	16° / 5°	10	16	4	171 mm	Bad	Pittsburgh in April
May	22° / 11°	10	21	0	181 mm	Ok	Pittsburgh in May
June	27° / 15°	9	21	0	201 mm	Good	Pittsburgh in June
July	29° / 18°	10	21	0	199 mm	Ok	Pittsburgh in July
August	29° / 17°	7	24	0	149 mm	Ok	Pittsburgh in August
September	25° / 14°	6	24	0	146 mm	Perfect	Pittsburgh in September
October	17° / 8°	8	23	0	143 mm	Ok	Pittsburgh in October
November	10° / 2°	8	17	6	104 mm	Awful	Pittsburgh in November
December	4° / -2°	9	9	13	140 mm	Awful	Pittsburgh in December