Saint Louis County (Eureka)
August
Weather in Saint Louis County, Missouri for August 2026
Your guide to Saint Louis County weather in August - trends and predictions
Until now, August 2026 in Saint Louis County is slightly cooler than the historical average by 0.7 °F.
The forecast for the coming days of August 2026 predicts a temperature of 36.1 °F , which is warmer than usual.
In general, the average temperature in Saint Louis County at the beginning of August is 30.7 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 33 °F by the end of August.
Saint Louis County experiences moderate rainfall in August, with an average of 8 rainy days and a total precipitation of 37.1 mm.
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Temperatures
Rain 🌧️
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23
Dry days
8
Rainy days
0
Snow days
31°/19°
Temperatures
14 km/h
Avg max wind
64 %
Avg humidity
Saint Louis County Weather August
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Temperatures trend during August in Saint Louis County
See the weather trend as well as the moving average line
August weather in Saint Louis County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Sunny | 29° /20° | 1.3 mm | 6 | |
| Aug. 2 |  Overcast | 29° /19° | 0 mm | 8 | |
| Aug. 3 |  Mist | 30° /18° | 0 mm | 8 | |
| Aug. 4 |  Partly cloudy | 32° /19° | 0 mm | 8 | |
| Aug. 5 | Sunny | 33° /20° | 0.5 mm | 9 | |
| Aug. 6 | Sunny | 31° /20° | 28 mm | 8 | |
| Aug. 7 |  Cloudy | 31° /19° | 0.5 mm | 8 | |
| Aug. 8 | Partly cloudy | 33° /20° | 0 mm | 9 | |
| Aug. 9 | Sunny | 33° /20° | 0 mm | 9 | |
| Aug. 10 | Partly cloudy | 32° /20° | 0 mm | 8 | |
| Aug. 11 | Cloudy | 33° /21° | 1.6 mm | 8 | |
| Aug. 12 | Sunny | 38° /24° | 0.4 mm | 8.3 | |
| Aug. 13 | Sunny | 38° /21° | 0 mm | 7.4 | |
| Aug. 14 | Sunny | 41° /23° | 1.9 mm | 8.5 | |
| Aug. 15 | Sunny | 41° /25° | 0 mm | 7.8 | |
| Aug. 16 | Sunny | 38° /24° | 3.9 mm | 9.1 | |
| Aug. 17 |  Light rain shower | 31° /22° | 4.9 mm | 8 | |
| Aug. 18 | Sunny | 33° /20° | 0.8 mm | 8 | |
| Aug. 19 | Sunny | 44° /22° | 0 mm | 10 | |
| Aug. 20 | Sunny | 40° /26° | 0 mm | 10 | |
| Aug. 21 | Sunny | 27° /19° | 0 mm | 7 | |
| Aug. 22 | Sunny | 31° /17° | 0 mm | 8 | |
| Aug. 23 | Sunny | 33° /17° | 1.8 mm | 8 | |
| Aug. 24 | Sunny | 34° /19° | 0 mm | 8 | |
| Aug. 25 | Sunny | 36° /19° | 0 mm | 9 | |
| Aug. 26 | Patchy rain possible | 32° /14° | 0.5 mm | 7 | |
| Aug. 27 | Sunny | 33° /18° | 0 mm | 8 | |
| Aug. 28 | Partly cloudy | 34° /18° | 0 mm | 8 | |
| Aug. 29 | Sunny | 35° /18° | 0.1 mm | 9 | |
| Aug. 30 | Cloudy | 32° /20° | 11.4 mm | 7 | |
| Aug. 31 | Light rain shower | 29° /20° | 1.9 mm | 7 | |
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Important Notice
Our weather forecast for Saint Louis County 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 Saint Louis County forecast closer to your planned date for the most up-to-date weather information.
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Saint Louis County in August - FAQ
What are the expected maximum and minimum temperatures in Saint Louis County during August?
Expect warm days with temperatures around 31°, cooling to mild conditions of 19° after sunset. Perfect for those who enjoy warm weather.
How much rainfall should be expected in Saint Louis County during August?
In August, Saint Louis County can expect light to moderate rainfall, totaling 37.1 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Saint Louis County during August?
The average wind speed in Saint Louis County during August is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Saint Louis County
Explore the daily rainfall trends and prepare for Saint Louis Countys August weather 💧
Typically, Saint Louis County has 8 rainy days in August with a total of 37.1 mm of rainfall.
UV exposure in Saint Louis County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is Saint Louis County?Get accurate weather forecasts for Saint Louis County, located at latitude 38.503 and longitude -90.628. Stay updated with localized weather information tailored for Saint Louis County.
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