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

21°F

-6°C

Humidity 57%
Wind Speed NW 12 mph
Barometer 30.52 in (1034.2 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 22 Feb 11:54 pm CST
Extended Forecast for

4 Miles W Old Monroe MO

  • Overnight

    Overnight: Partly cloudy, with a low around 14. Northwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 14 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 33. Northwest wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 21 mph.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 55. South wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 55 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. Southwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.

    Low: 33 °F

    Rain Likely

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 50.

    High: 50 °F

    Slight Chance
    Rain then
    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 29.

    Low: 29 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 14. Northwest wind around 14 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 33. Northwest wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly clear, with a low around 20. Calm wind becoming south 5 to 7 mph after midnight.
Tuesday
Mostly cloudy, with a high near 55. South wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly cloudy, with a low around 33. Southwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 54.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Thursday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 50.
Thursday Night
Clear, with a low around 29.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 37.
Saturday
Mostly sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
A slight chance of rain and snow. Partly sunny, with a high near 49. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Old Monroe MO
 38.94°N 90.82°W (Elev. 525 ft)
Last Update:
10:26 pm CST Feb 22, 2026
Forecast Valid:
12am CST Feb 23, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation