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

46°F

8°C

Humidity 86%
Wind Speed W 5 mph
Barometer 29.75 in (1007.2 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 14 Jan 2:54 am CST
Extended Forecast for

2 Miles S Dow IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 37. West wind 9 to 14 mph, with gusts as high as 26 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Scattered flurries between 8am and 11am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 29 by 5pm. Breezy, with a northwest wind 16 to 23 mph, with gusts as high as 36 mph.

    High: 38 °F⇓

    Scattered
    Flurries and
    Breezy

  • Wednesday Night

    Wednesday Night: Clear, with a low around 17. Northwest wind 9 to 16 mph, with gusts as high as 28 mph.

    Low: 17 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 33. Northwest wind 7 to 9 mph becoming south in the afternoon.

    High: 33 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 27 °F

    Chance Snow

  • Friday

    Friday: Partly sunny, with a high near 43. Breezy.

    High: 43 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.

    Low: 18 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 25.

    High: 25 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 8.

    Low: 8 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 37. West wind 9 to 14 mph, with gusts as high as 26 mph.
Wednesday
Scattered flurries between 8am and 11am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 29 by 5pm. Breezy, with a northwest wind 16 to 23 mph, with gusts as high as 36 mph.
Wednesday Night
Clear, with a low around 17. Northwest wind 9 to 16 mph, with gusts as high as 28 mph.
Thursday
Increasing clouds, with a high near 33. Northwest wind 7 to 9 mph becoming south in the afternoon.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27. South wind 7 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
Partly sunny, with a high near 43. Breezy.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 18.
Saturday
Partly sunny, with a high near 25.
Saturday Night
Partly cloudy, with a low around 8.
Sunday
Mostly sunny, with a high near 24.
Sunday Night
Partly cloudy, with a low around 14.
M.L.King Day
Mostly sunny, with a high near 29.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Dow IL
 39.02°N 90.3°W (Elev. 610 ft)
Last Update:
3:16 am CST Jan 14, 2026
Forecast Valid:
3am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation