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

41°F

5°C

Humidity 86%
Wind Speed NE 7 mph
Barometer 30.13 in (1020.4 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 9 Jan 7:54 pm CST
Extended Forecast for

4 Miles W Dow IL

  • Tonight

    Tonight: A 40 percent chance of rain, mainly after 3am. Mostly cloudy, with a low around 36. Calm wind becoming northwest 5 to 8 mph after midnight.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A chance of rain before 9am, then a chance of sprinkles after 4pm. Cloudy through mid morning, then gradual clearing, with a high near 45. Northwest wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    High: 45 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: A chance of sprinkles and flurries before 9pm, then a chance of flurries between 9pm and midnight. Partly cloudy, with a low around 24. Northwest wind 11 to 16 mph, with gusts as high as 30 mph.

    Low: 24 °F

    Chance
    Sprinkles/Flurries
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 36. Northwest wind 12 to 17 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 36 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Southwest wind 5 to 8 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly after 3am. Mostly cloudy, with a low around 36. Calm wind becoming northwest 5 to 8 mph after midnight.
Saturday
A chance of rain before 9am, then a chance of sprinkles after 4pm. Cloudy through mid morning, then gradual clearing, with a high near 45. Northwest wind 11 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Saturday Night
A chance of sprinkles and flurries before 9pm, then a chance of flurries between 9pm and midnight. Partly cloudy, with a low around 24. Northwest wind 11 to 16 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 36. Northwest wind 12 to 17 mph decreasing to 6 to 11 mph in the afternoon. Winds could gust as high as 26 mph.
Sunday Night
Mostly clear, with a low around 26. Southwest wind 5 to 8 mph.
Monday
Sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 42.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Mostly cloudy, with a high near 41.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Dow IL
 39.04°N 90.38°W (Elev. 614 ft)
Last Update:
4:51 pm CST Jan 9, 2026
Forecast Valid:
8pm CST Jan 9, 2026-6pm CST Jan 16, 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