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.

Partly Cloudy

61°F

16°C

Humidity 78%
Wind Speed N 9 mph
Barometer 29.85 in (1010.7 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Nov 3:54 pm CST
Extended Forecast for

Dow IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. North wind around 6 mph.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 57. North wind around 5 mph becoming calm in the morning.

    High: 57 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 48. Calm wind becoming southeast around 6 mph after midnight.

    Low: 48 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday

    Thursday: Rain likely, with thunderstorms also possible after 3pm. Cloudy, with a high near 61. South wind 6 to 8 mph. Chance of precipitation is 60%.

    High: 61 °F

    Rain Likely

  • Thursday Night

    Thursday Night: Rain likely, mainly after midnight. Cloudy, with a low around 51. Light and variable wind becoming northeast 5 to 7 mph after midnight. Chance of precipitation is 60%.

    Low: 51 °F

    Rain Likely

  • Friday

    Friday: Rain. High near 57. Chance of precipitation is 80%.

    High: 57 °F

    Rain

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 58.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. North wind around 6 mph.
Wednesday
Cloudy, with a high near 57. North wind around 5 mph becoming calm in the morning.
Wednesday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 48. Calm wind becoming southeast around 6 mph after midnight.
Thursday
Rain likely, with thunderstorms also possible after 3pm. Cloudy, with a high near 61. South wind 6 to 8 mph. Chance of precipitation is 60%.
Thursday Night
Rain likely, mainly after midnight. Cloudy, with a low around 51. Light and variable wind becoming northeast 5 to 7 mph after midnight. Chance of precipitation is 60%.
Friday
Rain. High near 57. Chance of precipitation is 80%.
Friday Night
A 40 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 45.
Saturday
Mostly sunny, with a high near 58.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 61.
Sunday Night
Partly cloudy, with a low around 43.
Monday
A 30 percent chance of rain. Partly sunny, with a high near 59.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 43.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dow IL
 39.04°N 90.33°W (Elev. 623 ft)
Last Update:
3:16 pm CST Nov 18, 2025
Forecast Valid:
4pm CST Nov 18, 2025-6pm CST Nov 25, 2025
 
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