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Weather in City of Saint Louis, Missouri for August 2026

Your guide to City of Saint Louis weather in August - trends and predictions

    Official Weather Alert ⚠️

  • Extreme Heat Warning - See hour by hour.

    • Temperatures

  • Until now, August 2026 in City of Saint Louis has been nearly identical to the historical average, with a temperature of 31 °F (showing only a slight deviation of 0.2 °F).

  • The forecast for the upcoming days in City of Saint Louis predicts a temperature of 35.5 °F, which is slightly above the historical average.

  • In general, the average temperature in City of Saint Louis at the beginning of August is 30.9 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 33.3 °F by the end of August.

    • Rain 🌧️

  • City of Saint Louis experiences heavy rainfall in August, with over 20 rainy days and an average total precipitation 120.5 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
9
Dry days
Average rainy days
22
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/20°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
67 %
Avg humidity

City of Saint Louis Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
31°
2
Overcast
29°
3
Partly cloudy
31°
4
Sunny
30°
5
Sunny
32°
6
Sunny
32°
7
Patchy rain possible
31°
8
Sunny
33°
9
Moderate or heavy rain shower
31°
10
Partly cloudy
32°
11
Cloudy
34°
12
Weather Alert Sunny
39°
13
Weather Alert Sunny
37°
14
Sunny
39°
15
Sunny
40°
16
Sunny
36°
17
Sunny
30°
18
Sunny
32°
19
Sunny
43°
20
Sunny
40°
21
Sunny
27°
22
Sunny
30°
23
Sunny
33°
24
Sunny
34°
25
Sunny
37°
26
Moderate or heavy rain shower
34°
27
Patchy rain possible
34°
28
Patchy rain possible
33°
29
Moderate or heavy rain shower
34°
30
Cloudy
32°
31
Partly cloudy
29°

Temperatures trend during August in City of Saint Louis

See the weather trend as well as the moving average line

August weather in City of Saint Louis day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Patchy rain possible
Patchy rain possible
 31° /20° 3.2 mm 7
Aug. 2 Overcast
Overcast
 29° /19° 15.5 mm 7
Aug. 3 Partly cloudy
Partly cloudy
 31° /19° 12 mm 8
Aug. 4 Sunny
Sunny
 30° /19° 3.1 mm 8
Aug. 5 Sunny
Sunny
 32° /20° 5.8 mm 8
Aug. 6 Sunny
Sunny
 32° /20° 12.6 mm 8
Aug. 7 Patchy rain possible
Patchy rain possible
 31° /20° 2.1 mm 8
Aug. 8 Sunny
Sunny
 33° /21° 2.6 mm 8
Aug. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /20° 10.5 mm 8
Aug. 10 Partly cloudy
Partly cloudy
 32° /20° 0.6 mm 8
Aug. 11 Cloudy
Cloudy
 34° /20° 2.5 mm 8
Aug. 12 Sunny
Sunny
 39° /25° 0 mm 8.2
Aug. 13 Sunny
Sunny
 37° /22° 0.1 mm 7.6
Aug. 14 Sunny
Sunny
 39° /24° 3.5 mm 8.5
Aug. 15 Sunny
Sunny
 40° /28° 0 mm 7.8
Aug. 16 Sunny
Sunny
 36° /24° 3.5 mm 9
Aug. 17 Sunny
Sunny
 30° /21° 7.5 mm 7
Aug. 18 Sunny
Sunny
 32° /20° 0 mm 8
Aug. 19 Sunny
Sunny
 43° /22° 0 mm 10
Aug. 20 Sunny
Sunny
 40° /28° 0.3 mm 9
Aug. 21 Sunny
Sunny
 27° /19° 0 mm 7
Aug. 22 Sunny
Sunny
 30° /17° 0 mm 7
Aug. 23 Sunny
Sunny
 33° /18° 0 mm 8
Aug. 24 Sunny
Sunny
 34° /19° 0 mm 8
Aug. 25 Sunny
Sunny
 37° /20° 0 mm 9
Aug. 26 Moderate or heavy rain shower
Moderate or heavy rain shower
 34° /20° 1.7 mm 8
Aug. 27 Patchy rain possible
Patchy rain possible
 34° /19° 0.3 mm 7
Aug. 28 Patchy rain possible
Patchy rain possible
 33° /19° 0.6 mm 7
Aug. 29 Moderate or heavy rain shower
Moderate or heavy rain shower
 34° /20° 3.6 mm 8
Aug. 30 Cloudy
Cloudy
 32° /19° 6.8 mm 7
Aug. 31 Partly cloudy
Partly cloudy
 29° /17° 2.3 mm 7
Next
Important Notice
Our weather forecast for City of Saint 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 City of Saint Louis forecast closer to your planned date for the most up-to-date weather information.
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City of Saint Louis in August - FAQ

What are the expected maximum and minimum temperatures in City of Saint Louis during August?
Expect warm days with temperatures around 31°, cooling to mild conditions of 20° after sunset. Perfect for those who enjoy warm weather.

How much rainfall should be expected in City of Saint Louis during August?
Significant rainfall exceeding 120.5 mm is expected in City of Saint Louis during August, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.

What are the typical wind conditions in City of Saint Louis during August?
The average wind speed in City of Saint Louis during August is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in City of Saint Louis

Explore the daily rainfall trends and prepare for City of Saint Louiss August weather 💧
Typically, City of Saint Louis has 22 rainy days in August with a total of 120.5 mm of rainfall.

UV exposure in City of Saint Louis during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Get accurate weather forecasts for City of Saint Louis, located at latitude 38.627 and longitude -90.198. Stay updated with localized weather information tailored for City of Saint Louis.

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