St. Louis
August
Weather in St. Louis for August 2025
Your guide to St. Louis weather in August - trends and predictions
In general, the average temperature in St. Louis at the beginning of August is 31.7 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 34.6 °F by the end of August.
Expect significant rainfall in St. Louis during August, with an average of 16 rainy days.
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15
Dry days
16
Rainy days
0
Snow days
32°/20°
Temperatures
16 km/h
Avg max wind
67 %
Avg humidity
St. Louis in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  34° | 2 30° | 3 32° | ||||
| 4  32° | 5 34° | 6 34° | 7 26° | 8 30° | 9 27° | 10  29° |
| 11 32° | 12 28° | 13 27° | 14  28° | 15 28° | 16 31° | 17  32° |
| 18  29° | 19 30° | 20 33° | 21 31° | 22 31° | 23 35° | 24 37° |
| 25 36° | 26 37° | 27 36° | 28 35° | 29  37° | 30 33° | 31 28° |
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Temperatures trend during August in St. Louis
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 | Moderate or heavy rain shower | 34° /22° | 5.3 mm | 8 | |
| Aug. 2 | Moderate or heavy rain shower | 30° /20° | 46.6 mm | 7 | |
| Aug. 3 | Moderate or heavy rain shower | 32° /21° | 35 mm | 7 | |
| Aug. 4 | Patchy rain possible | 32° /21° | 1.5 mm | 8 | |
| Aug. 5 | Moderate or heavy rain shower | 34° /22° | 16.9 mm | 8 | |
| Aug. 6 | Moderate rain at times | 34° /19° | 6.8 mm | 8 | |
| Aug. 7 | Moderate rain at times | 26° /19° | 3.5 mm | 6 | |
| Aug. 8 | Patchy rain possible | 30° /18° | 0.2 mm | 7 | |
| Aug. 9 | Moderate or heavy rain shower | 27° /18° | 4.3 mm | 7 | |
| Aug. 10 | Overcast | 29° /16° | 0 mm | 7 | |
| Aug. 11 | Overcast | 32° /18° | 0 mm | 7 | |
| Aug. 12 | Moderate or heavy rain shower | 28° /20° | 12.6 mm | 6 | |
| Aug. 13 | Moderate or heavy rain shower | 27° /19° | 8 mm | 6 | |
| Aug. 14 | Heavy rain at times | 28° /19° | 5.8 mm | 6 | |
| Aug. 15 | Patchy rain possible | 28° /19° | 6 mm | 6 | |
| Aug. 16 | Overcast | 31° /18° | 3.4 mm | 7 | |
| Aug. 17 | Partly cloudy | 32° /18° | 1.9 mm | 8 | |
| Aug. 18 | Sunny | 29° /17° | 0 mm | 7 | |
| Aug. 19 | Sunny | 30° /17° | 0 mm | 8 | |
| Aug. 20 | Sunny | 33° /17° | 0 mm | 8 | |
| Aug. 21 | Patchy rain possible | 31° /19° | 0.2 mm | 8 | |
| Aug. 22 | Patchy rain possible | 31° /18° | 0.3 mm | 7 | |
| Aug. 23 | Overcast | 35° /19° | 0 mm | 8 | |
| Aug. 24 | Sunny | 37° /24° | 0 mm | 9 | |
| Aug. 25 | Patchy rain possible | 36° /23° | 2.1 mm | 8 | |
| Aug. 26 | Light rain shower | 37° /22° | 2.1 mm | 8 | |
| Aug. 27 | Overcast | 36° /20° | 0.4 mm | 8 | |
| Aug. 28 | Sunny | 35° /18° | 0 mm | 9 | |
| Aug. 29 | Cloudy | 37° /19° | 0.5 mm | 8 | |
| Aug. 30 | Cloudy | 33° /20° | 7.6 mm | 8 | |
| Aug. 31 | Partly cloudy | 28° /16° | 3 mm | 7 | |
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Important Notice
Our weather forecast for St. Louis in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the St. Louis forecast closer to your planned date for the most up-to-date weather information.
St. Louis in August - FAQ
What are the expected maximum and minimum temperatures in St. Louis during August?
Expect warm days with temperatures around 32°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in St. Louis during August?
Significant rainfall exceeding 290.1 mm is expected in St. Louis during August, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in St. Louis during August?
The average wind speed in St. Louis during August is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in St. Louis
Explore the daily rainfall trends and prepare for St. Louiss August weather 💧
UV exposure in St. Louis during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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