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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

79°F

26°C

Humidity 38%
Wind Speed W 13 mph
Barometer 29.77 in (1007.7 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 9 May 2:54 pm CDT
Extended Forecast for

Saint Peters MO

  • Tonight

    Tonight: Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 4am. Increasing clouds, with a low around 56. Southwest wind 5 to 7 mph becoming light and variable. Chance of precipitation is 70%.

    Low: 56 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 69. North wind 6 to 8 mph.

    High: 69 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46. North wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 75. Calm wind becoming west around 6 mph in the afternoon.

    High: 75 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. Calm wind becoming south around 5 mph after midnight.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 58. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 51.

    Low: 51 °F

    Clear

Detailed Forecast

Tonight
Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 4am. Increasing clouds, with a low around 56. Southwest wind 5 to 7 mph becoming light and variable. Chance of precipitation is 70%.
Sunday
Partly sunny, with a high near 69. North wind 6 to 8 mph.
Sunday Night
Mostly clear, with a low around 46. North wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 75. Calm wind becoming west around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 51. Calm wind becoming south around 5 mph after midnight.
Tuesday
Sunny, with a high near 83.
Tuesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 58. Chance of precipitation is 40%.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Clear, with a low around 51.
Thursday
Sunny, with a high near 77.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 58.
Friday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 93.
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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:
3:06 pm CDT May 9, 2026
Forecast Valid:
3pm CDT May 9, 2026-6pm CDT May 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation