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.

Fair

61°F

16°C

Humidity 78%
Wind Speed Calm
Barometer 30.18 in (1021.5 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 15 Oct 4:54 am CDT
Extended Forecast for

4 Miles WNW Old Monroe MO

  • Today

    Today: Sunny, with a high near 83. Calm wind.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Light east wind becoming southeast 5 to 10 mph in the morning.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 59. Southeast wind around 7 mph.

    Low: 59 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 82. South wind 6 to 10 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Clear
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.

    High: 75 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Partly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Sunny, with a high near 65.

    High: 65 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 83. Calm wind.
Tonight
Mostly clear, with a low around 59. Calm wind.
Thursday
Sunny, with a high near 81. Light east wind becoming southeast 5 to 10 mph in the morning.
Thursday Night
Increasing clouds, with a low around 59. Southeast wind around 7 mph.
Friday
Partly sunny, with a high near 82. South wind 6 to 10 mph.
Friday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 62.
Saturday
Showers and possibly a thunderstorm. High near 75. Chance of precipitation is 80%.
Saturday Night
Showers likely, mainly before 1am. Partly cloudy, with a low around 46. Chance of precipitation is 60%.
Sunday
A 20 percent chance of showers before 1pm. Sunny, with a high near 65.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 74.
Monday Night
A 20 percent chance of showers. Mostly clear, with a low around 50.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Old Monroe MO
 38.94°N 90.82°W (Elev. 525 ft)
Last Update:
4:16 am CDT Oct 15, 2025
Forecast Valid:
5am CDT Oct 15, 2025-6pm CDT Oct 21, 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