The highest day temperature in August 2023 was 112°F. The lowest night temperature was 58°F. The average values for day and night temperatures during August were 91.4°F и 73.3°F respectivly.

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

Precipitation total in August for St. Louis is 3.7 in. It makes august one of the most rainy months of the year.

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

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.