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.

Overcast

45°F

7°C

Humidity 74%
Wind Speed W 18 mph
Barometer 29.98 in (1015.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 9 Jan 7:54 am CST
Extended Forecast for

4 Miles NNE Saint Charles MO

  • Today

    Today: Mostly cloudy, with a high near 50. West wind 5 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.

    High: 50 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 40 percent chance of rain, mainly after 3am. Mostly cloudy, with a low around 35. Light and variable wind becoming northwest 5 to 7 mph after midnight.

    Low: 35 °F

    Partly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 47. West wind 8 to 16 mph, with gusts as high as 25 mph.

    High: 47 °F

    Slight Chance
    Rain then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23. Northwest wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 50. West wind 5 to 14 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.
Tonight
A 40 percent chance of rain, mainly after 3am. Mostly cloudy, with a low around 35. Light and variable wind becoming northwest 5 to 7 mph after midnight.
Saturday
A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 47. West wind 8 to 16 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 23. Northwest wind 11 to 14 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 38. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 25.
Monday
Sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 56.
Tuesday Night
Mostly cloudy, with a low around 36.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 24.
Thursday
Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNE Saint Charles MO
 38.85°N 90.51°W (Elev. 436 ft)
Last Update:
6:21 am CST Jan 9, 2026
Forecast Valid:
8am CST Jan 9, 2026-6pm CST Jan 15, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation