Measurements:
°C
°F
St. Louis
66°F
W 6 mph
Feels like: 66°F
Precip: 1%
World Resorts USA St. Louis Weather August Weather in St. Louis

St. Louis Weather: August

Average Day Temperature: 90.9°F
Average Night Temperature: 73.9°F
Number of Sunny Days: 17 days
Sunshine Hours: 13.1 - 14.1 hours
Number of Rainy Days: 5 days
Precipitation Totals: 3.1 in

Air Temperature in August, °F

Select Year: 2026 2025 2024

The highest day temperature in August 2026 was 104°F. The lowest night temperature was 62°F. The average values for day and night temperatures during August were 93.5°F и 73.6°F respectivly.

Sunny, Cloudy and Gloomy days

Most of the days in August are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in August, in

Precipitation total in August for St. Louis is 3.1 in. It makes august one of the most rainy months of the year.

Wind Speed in August, mph

The average wind speed in August is 6.4 mph. It makes August the most windless month of the year for St. Louis.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for St. Louis in August is 9.4 hours.

Best Time to Visit St. Louis
The most sunny months:
June 18 days
July 17 days
August 17 days
The most warm months:
July 92.6 °F
August 90.9 °F
June 88.8 °F
The most cold months:
January 33.5 °F
February 39.8 °F
December 42.0 °F
The most rainy months:
May 7 days
June 6 days
April 6 days
The most windy months:
April 10 mph
March 10 mph
February 9 mph

St. Louis on the Weather Map

USA Resorts:
NAME
F°
Boston +58
Chicago +60
Hawaii +82
Houston +84
Las Vegas +92
Los Angeles +102
Maui +74
Miami +88
Myrtle Beach +70
New York +62
San Diego +84
San Francisco +66
Santa Monica +94
Sarasota +84
Washington +64
24 Hours Weather Forecast
St. Louis
Local time: 19:53
05 oct, monday
2100 66°F
W
6 mph
06 oct, tuesday
0000 64°F
W
6 mph
0300 60°F
NW
6 mph
0600 58°F
NW
6 mph
0900 64°F
NW
7 mph
1200 78°F
N
7 mph
1500 84°F
N
7 mph
1800 80°F
N
4 mph