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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fog/Mist

67°F

19°C

Humidity 93%
Wind Speed Calm
Barometer 29.90 in (1012.2 mb)
Dewpoint 65°F (18°C)
Visibility 4.00 mi
Last update 23 Sep 7:54 am CDT
Extended Forecast for

Old Monroe MO

  • Today

    Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 82. Calm wind becoming south 5 to 8 mph. Chance of precipitation is 80%.

    High: 82 °F

    Chance
    Showers then
    Showers

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 4am, then showers likely. Patchy fog after midnight. Low around 64. Calm wind becoming northeast 5 to 8 mph in the evening. Chance of precipitation is 80%.

    Low: 64 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 74. North wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

    High: 74 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. North wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    Low: 58 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers. Mostly sunny, with a high near 76. North wind 6 to 8 mph.

    High: 76 °F

    Slight Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3pm. High near 82. Calm wind becoming south 5 to 8 mph. Chance of precipitation is 80%.
Tonight
Showers and possibly a thunderstorm before 4am, then showers likely. Patchy fog after midnight. Low around 64. Calm wind becoming northeast 5 to 8 mph in the evening. Chance of precipitation is 80%.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 74. North wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. North wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 76. North wind 6 to 8 mph.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 80.
Friday Night
Clear, with a low around 55.
Saturday
Sunny, with a high near 84.
Saturday Night
Clear, with a low around 54.
Sunday
Sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 55.
Monday
Sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Old Monroe MO
 38.92°N 90.76°W (Elev. 436 ft)
Last Update:
5:46 am CDT Sep 23, 2025
Forecast Valid:
8am CDT Sep 23, 2025-6pm CDT Sep 29, 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