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.

Overcast

52°F

11°C

Humidity 86%
Wind Speed E 9 mph
Barometer 30.17 in (1021.7 mb)
Dewpoint 48°F (9°C)
Visibility 7.00 mi
Wind Chill49°F (9°C)
Last update 24 Dec 10:54 am CST
Extended Forecast for

3 Miles SW Dow IL

  • Today

    Today: Mostly cloudy, with a high near 62. Southeast wind 8 to 10 mph.

    High: 62 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy dense fog after midnight. Otherwise, mostly cloudy, with a low around 51. South wind 5 to 8 mph becoming light and variable.

    Low: 51 °F

    Mostly Cloudy
    then Patchy
    Dense Fog

  • Christmas Day

    Christmas Day: Areas of dense fog before 11am. Otherwise, mostly cloudy, with a high near 60. Light and variable wind becoming east 5 to 7 mph in the morning.

    High: 60 °F

    Areas Dense
    Fog then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Cloudy, then gradually becoming partly cloudy, with a low around 54. East wind 7 to 9 mph becoming south after midnight.

    Low: 54 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny, with a high near 67. South wind 7 to 11 mph becoming northwest in the afternoon.

    High: 67 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of rain before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 48. Breezy. Chance of precipitation is 20%.

    High: 48 °F

    Breezy.
    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

Detailed Forecast

Today
Mostly cloudy, with a high near 62. Southeast wind 8 to 10 mph.
Tonight
Patchy dense fog after midnight. Otherwise, mostly cloudy, with a low around 51. South wind 5 to 8 mph becoming light and variable.
Christmas Day
Areas of dense fog before 11am. Otherwise, mostly cloudy, with a high near 60. Light and variable wind becoming east 5 to 7 mph in the morning.
Thursday Night
Cloudy, then gradually becoming partly cloudy, with a low around 54. East wind 7 to 9 mph becoming south after midnight.
Friday
Sunny, with a high near 67. South wind 7 to 11 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 68.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
A slight chance of rain before noon, then a slight chance of rain and snow. Mostly cloudy, with a high near 48. Breezy. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 15.
Tuesday
Partly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dow IL
 39.02°N 90.33°W (Elev. 650 ft)
Last Update:
11:01 am CST Dec 24, 2025
Forecast Valid:
11am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation