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

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Heavy Rain Fog/Mist

70°F

21°C

Humidity 93%
Wind Speed Calm
Barometer 29.98 in (1014.5 mb)
Dewpoint 68°F (20°C)
Visibility 2.50 mi
Last update 14 Oct 5:54 am CDT
Extended Forecast for

3 Miles ESE Old Monroe MO

  • Today

    Today: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 77. North wind around 6 mph. Chance of precipitation is 80%.

    High: 77 °F

    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Cloudy, with a low around 64. North wind around 6 mph becoming east after midnight. Chance of precipitation is 40%.

    Low: 64 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 82. East wind 6 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 82 °F

    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 46. Northwest wind 7 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 46 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 60. Breezy, with a northwest wind 18 to 21 mph, with gusts as high as 33 mph.

    High: 60 °F

    Mostly Sunny
    and Breezy

  • Friday Night

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

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

Detailed Forecast

Today
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 77. North wind around 6 mph. Chance of precipitation is 80%.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Cloudy, with a low around 64. North wind around 6 mph becoming east after midnight. Chance of precipitation is 40%.
Thursday
Showers and possibly a thunderstorm, mainly before 3pm, then a chance of showers and thunderstorms after 3pm. High near 82. East wind 6 to 10 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 46. Northwest wind 7 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 60. Breezy, with a northwest wind 18 to 21 mph, with gusts as high as 33 mph.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 63.
Saturday Night
Clear, with a low around 39.
Sunday
Sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 74.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Old Monroe MO
 38.92°N 90.7°W (Elev. 430 ft)
Last Update:
5:06 am CDT Oct 14, 2026
Forecast Valid:
6am CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
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Additional Resources

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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