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

91°F

33°C

Humidity 38%
Wind Speed SW 12 G 20 mph
Barometer 29.85 in (1010.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 12 Oct 2:54 pm CDT
Extended Forecast for

Saint Peters MO

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 70. South wind 6 to 8 mph.

    Low: 70 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 95. Heat index values as high as 102. Southwest wind 6 to 8 mph.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 70. South wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 80. Light and variable wind. Chance of precipitation is 100%.

    High: 80 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 66. Light and variable wind. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 90%.

    High: 81 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.

    Low: 52 °F

    Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 64. Breezy.

    High: 64 °F

    Partly Sunny
    and Breezy
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming clear, with a low around 70. South wind 6 to 8 mph.
Tuesday
Sunny, with a high near 95. Heat index values as high as 102. Southwest wind 6 to 8 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 70. South wind 5 to 7 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 80. Light and variable wind. Chance of precipitation is 100%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 66. Light and variable wind. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 81. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 64. Breezy.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 63.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 77.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Peters MO
 38.78°N 90.59°W (Elev. 492 ft)
Last Update:
1:25 pm CDT Oct 12, 2026
Forecast Valid:
3pm CDT Oct 12, 2026-6pm CDT Oct 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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