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

-2°F

-19°C

Humidity 79%
Wind Speed W 3 mph
Barometer 30.46 in (1032.2 mb)
Dewpoint -7°F (-22°C)
Visibility 10.00 mi
Last update 1 Feb 2:54 am CST
Extended Forecast for

4 Miles W Old Monroe MO

  • Overnight

    Overnight: Clear, with a low around 1. Southwest wind 3 to 5 mph.

    Low: 1 °F

    Clear

  • Sunday

    Sunday: A 40 percent chance of snow, mainly after 2pm. Increasing clouds, with a high near 30. Calm wind becoming south 5 to 9 mph in the morning.

    High: 30 °F

    Chance Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 19. Light and variable wind becoming northwest around 6 mph after midnight.

    Low: 19 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 38. Northwest wind around 6 mph becoming calm in the afternoon.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. Light east wind.

    Low: 25 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 33.

    High: 33 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 1. Southwest wind 3 to 5 mph.
Sunday
A 40 percent chance of snow, mainly after 2pm. Increasing clouds, with a high near 30. Calm wind becoming south 5 to 9 mph in the morning.
Sunday Night
A 20 percent chance of snow before 7pm. Cloudy, then gradually becoming partly cloudy, with a low around 19. Light and variable wind becoming northwest around 6 mph after midnight.
Monday
Mostly sunny, with a high near 38. Northwest wind around 6 mph becoming calm in the afternoon.
Monday Night
Mostly cloudy, with a low around 25. Light east wind.
Tuesday
Mostly cloudy, with a high near 33.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Mostly sunny, with a high near 31.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Partly sunny, with a high near 42.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 47.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 34.
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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:
2:26 am CST Feb 1, 2026
Forecast Valid:
3am CST Feb 1, 2026-6pm CST Feb 7, 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