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.

Mostly Cloudy

82°F

28°C

Humidity 74%
Wind Speed S 5 mph
Barometer 29.91 in (1011.8 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 8 Jun 6:54 pm CDT
Extended Forecast for

Saint Peters MO

Flood Watch June 8, 07:11pm until June 9, 07:00am
Heat Advisory June 9, 12:00pm until June 9, 10:00pm
Click here for hazard details and duration
Flood Watch
Heat Advisory
  •  
    Flood Watch June 8, 07:11pm until June 9, 07:00am

    NOW until 7:00am Tue

    Flood Watch

  • Tonight

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 107. Southwest wind 5 to 8 mph.

    High: 92 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 74. Southwest wind 5 to 7 mph.

    Low: 74 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 103. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 74. South wind 8 to 10 mph. Chance of precipitation is 30%.

    Low: 74 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 93. Chance of precipitation is 50%.

    High: 93 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Tonight
A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 71. Southwest wind 3 to 6 mph.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 92. Heat index values as high as 107. Southwest wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 74. Southwest wind 5 to 7 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 103. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 4am, then a slight chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 74. South wind 8 to 10 mph. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 10am, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 93. Chance of precipitation is 50%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Low around 67. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 85.
Friday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 65.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Sunday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Sunday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Monday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
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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 Jun 8, 2026
Forecast Valid:
7pm CDT Jun 8, 2026-6pm CDT Jun 15, 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