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.

Fair and Breezy

48°F

9°C

Humidity 32%
Wind Speed S 22 G 30 mph
Barometer 29.68 in (1005.4 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 24 Feb 12:54 pm CST
Extended Forecast for

Old Monroe MO

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 57. Southwest wind 13 to 18 mph, with gusts as high as 32 mph.

    High: 57 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Southwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 21 mph.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 52. Calm wind becoming north around 5 mph.

    High: 52 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 35. East wind 3 to 6 mph.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 51. East wind around 6 mph becoming light and variable in the afternoon.

    High: 51 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 57. Southwest wind 13 to 18 mph, with gusts as high as 32 mph.
Tonight
Mostly cloudy, with a low around 34. Southwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 21 mph.
Wednesday
Partly sunny, with a high near 52. Calm wind becoming north around 5 mph.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35. East wind 3 to 6 mph.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 51. East wind around 6 mph becoming light and variable in the afternoon.
Thursday Night
Mostly clear, with a low around 34.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 40.
Saturday
Sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 31.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 45. Chance of precipitation is 40%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 50%.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 48.
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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:
1:41 pm CST Feb 24, 2026
Forecast Valid:
1pm CST Feb 24, 2026-6pm CST Mar 2, 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