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.

Fair

54°F

12°C

Humidity 83%
Wind Speed N 3 mph
Barometer 30.05 in (1017.3 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 21 Apr 9:54 pm CDT
Extended Forecast for

3 Miles E Dow IL

  • Tonight

    Tonight: Mostly clear, with a low around 48. Calm wind becoming southeast around 6 mph after midnight.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 76. South wind 7 to 13 mph.

    High: 76 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. South wind 5 to 8 mph.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. Southeast wind 5 to 9 mph.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 56. Southeast wind around 6 mph.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly sunny, with a high near 79. Chance of precipitation is 30%.

    High: 79 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.

    Low: 61 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers, with thunderstorms also possible after 1pm. High near 75. Chance of precipitation is 90%.

    High: 75 °F

    Showers

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 48. Calm wind becoming southeast around 6 mph after midnight.
Tuesday
Sunny, with a high near 76. South wind 7 to 13 mph.
Tuesday Night
Mostly clear, with a low around 53. South wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 78. Southeast wind 5 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 56. Southeast wind around 6 mph.
Thursday
A slight chance of showers before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly sunny, with a high near 79. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 7pm, then a chance of showers and thunderstorms between 7pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Friday
Showers, with thunderstorms also possible after 1pm. High near 75. Chance of precipitation is 90%.
Friday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 54.
Saturday
Partly sunny, with a high near 69.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
A 20 percent chance of showers. Partly sunny, with a high near 72.
Sunday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 60.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Dow IL
 39.04°N 90.27°W (Elev. 600 ft)
Last Update:
10:37 pm CDT Apr 21, 2025
Forecast Valid:
10pm CDT Apr 21, 2025-6pm CDT Apr 28, 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