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

70°F

21°C

Humidity 66%
Wind Speed S 3 mph
Barometer 29.77 in (1007.2 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 18 Oct 12:54 am CDT
Extended Forecast for

2 Miles WNW Byrnes Mill MO

  • Overnight

    Overnight: Mostly clear, with a low around 63. South wind around 7 mph.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9am. High near 76. South wind 6 to 8 mph. Chance of precipitation is 90%.

    High: 76 °F

    Showers

  • Saturday Night

    Saturday Night: Showers, with thunderstorms also possible after 1am. Some of the storms could produce heavy rainfall. Low around 47. Southwest wind 6 to 16 mph becoming northwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 100%.

    Low: 47 °F

    Heavy Rain
    then Showers
    Likely

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 64. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    High: 64 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 42. West wind around 5 mph becoming calm in the evening.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 63. South wind around 7 mph.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9am. High near 76. South wind 6 to 8 mph. Chance of precipitation is 90%.
Saturday Night
Showers, with thunderstorms also possible after 1am. Some of the storms could produce heavy rainfall. Low around 47. Southwest wind 6 to 16 mph becoming northwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 100%.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 64. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 42. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 38.
Wednesday
Sunny, with a high near 66.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 45.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 70.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Byrnes Mill MO
 38.45°N 90.61°W (Elev. 548 ft)
Last Update:
1:06 am CDT Oct 18, 2025
Forecast Valid:
1am CDT Oct 18, 2025-6pm CDT Oct 24, 2025
 
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