St. Louis weather in August 2025

The temperatures in St. Louis in August are comfortable with low of 16°C and and high up to 26°C.

You can expect about 3 to 8 days of rain in St. Louis during the month of August. 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 St. Louis in August 2025.

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

Temperatures

26° / 16°

Rainy Days

Snowy Days

Dry Days

Rainfall

138

Sun Hours

10.8

Hrs

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

Explore the weather in St. Louis in other months

St. Louis annual weather

Month	Temperatures	Rainy Days	Dry Days	Snowy Days	Rainfall	Weather	More details
January	-1° / -7°	6	8	17	104 mm	Awful	St. Louis in January
February	1° / -6°	6	7	15	104 mm	Awful	St. Louis in February
March	8° / 0°	9	13	9	131 mm	Awful	St. Louis in March
April	14° / 5°	10	17	3	161 mm	Bad	St. Louis in April
May	21° / 12°	10	21	0	179 mm	Ok	St. Louis in May
June	25° / 16°	9	21	0	184 mm	Good	St. Louis in June
July	27° / 17°	9	22	0	165 mm	Good	St. Louis in July
August	26° / 16°	7	24	0	138 mm	Good	St. Louis in August
September	23° / 13°	6	24	0	109 mm	Perfect	St. Louis in September
October	17° / 8°	6	24	1	120 mm	Good	St. Louis in October
November	9° / 2°	7	18	5	107 mm	Awful	St. Louis in November
December	3° / -2°	8	11	12	102 mm	Awful	St. Louis in December

Temperatures in St. Louis in August

Rain in St. Louis in August

Weather in St. Louis in August - FAQ

What is the average temperature in St. Louis in August?

The average temperature in St. Louis in August is 16/26° C.

What is the chance of rain in St. Louis in August?

On average, there are 7 rainy days in St. Louis during August.

Weather wise, is August a good time to visit St. Louis?

The weather in St. Louis in August is good.

Can it snow in St. Louis in August?

On average, there are 0 snowy days in St. Louis in August.

More about the weather in St. Louis