Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

A Few Clouds

66°F

19°C

Humidity 81%
Wind Speed SE 6 mph
Barometer 29.89 in (1011.6 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 21 Jun 4:54 am CDT
Extended Forecast for

4 Miles W Dow IL

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch
  • Today

    Today: Showers and thunderstorms.  High near 81. Southeast wind 8 to 16 mph becoming south in the afternoon. Winds could gust as high as 26 mph.  Chance of precipitation is 90%.

    High: 81 °F

    T-storms

  • Tonight

    Tonight: Showers and thunderstorms, mainly before midnight.  Low around 60. Southwest wind 9 to 11 mph becoming north after midnight. Winds could gust as high as 22 mph.  Chance of precipitation is 80%.

    Low: 60 °F

    T-storms then
    Slight Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 75. North wind 10 to 13 mph, with gusts as high as 20 mph.

    High: 75 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. North wind 3 to 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80. Light east wind.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm.  Mostly sunny, with a high near 83.

    High: 83 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms. High near 81. Southeast wind 8 to 16 mph becoming south in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms, mainly before midnight. Low around 60. Southwest wind 9 to 11 mph becoming north after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%.
Monday
Mostly cloudy, with a high near 75. North wind 10 to 13 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 58. North wind 3 to 8 mph.
Tuesday
Sunny, with a high near 80. Light east wind.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Dow IL
 39.04°N 90.38°W (Elev. 614 ft)
5:31 am CDT Jun 21, 2026
6am CDT Jun 21, 2026-6pm CDT Jun 27, 2026
 
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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