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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

68°F

20°C

Humidity 84%
Wind Speed Calm
Barometer 29.92 in (1012.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 20 Sep 6:54 am CDT
Extended Forecast for

Spirit Of St. Louis Airport MO

  • Today

    Today: A slight chance of showers and thunderstorms between 1pm and 2pm. Partly sunny, with a high near 90. Northwest wind 3 to 8 mph. Chance of precipitation is 20%.

    High: 90 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 65. North wind 5 to 7 mph becoming light and variable. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. Northeast wind 6 to 9 mph. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 59. North wind 6 to 9 mph.

    Low: 59 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 70. North wind 9 to 11 mph.

    High: 70 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 1pm and 2pm. Partly sunny, with a high near 90. Northwest wind 3 to 8 mph. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 65. North wind 5 to 7 mph becoming light and variable. Chance of precipitation is 60%.
Monday
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 77. Northeast wind 6 to 9 mph. Chance of precipitation is 30%.
Monday Night
Mostly cloudy, with a low around 59. North wind 6 to 9 mph.
Tuesday
Mostly cloudy, with a high near 70. North wind 9 to 11 mph.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Partly sunny, with a high near 76.
Friday Night
Mostly cloudy, with a low around 53.
Saturday
Partly sunny, with a high near 78.
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ABOUT THIS FORECAST

 
Point Forecast:
Spirit Of St. Louis Airport MO
 38.65°N 90.66°W (Elev. 482 ft)
Last Update:
5:36 am CDT Sep 20, 2026
Forecast Valid:
7am CDT Sep 20, 2026-6pm CDT Sep 26, 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