National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair with Haze

87°F

31°C

Humidity 70%
Wind Speed N 5 mph
Barometer 29.82 in (1008.7 mb)
Dewpoint 76°F (24°C)
Visibility 6.00 mi
Heat Index98°F (37°C)
Last update 28 Jul 6:54 pm CDT
Extended Forecast for

Saint Peters MO

  • Tonight

    Tonight: Partly cloudy, with a low around 71. East wind 3 to 5 mph.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 87. Northeast wind 3 to 7 mph.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 67. East wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 88. Calm wind becoming east around 5 mph in the afternoon.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 69. South wind around 5 mph.

    Low: 69 °F

    Partly Cloudy

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.

    Low: 67 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 71. East wind 3 to 5 mph.
Wednesday
Sunny, with a high near 87. Northeast wind 3 to 7 mph.
Wednesday Night
Clear, with a low around 67. East wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 88. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 69. South wind around 5 mph.
Friday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Sunday Night
Partly cloudy, with a low around 68.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 69.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Peters MO
 38.78°N 90.59°W (Elev. 492 ft)
Last Update:
5:31 pm CDT Jul 28, 2026
Forecast Valid:
7pm CDT Jul 28, 2026-6pm CDT Aug 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation