Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

68°F

20°C

Humidity 93%
Wind Speed NE 3 mph
Barometer 30.00 in (1015.2 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 5 Aug 4:54 am CDT
Extended Forecast for

3 Miles SSW Dow IL

  • Today

    Today: Scattered showers and thunderstorms after 4pm.  Mostly sunny, with a high near 89. South wind 5 to 9 mph.  Chance of precipitation is 30%.

    High: 89 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms, mainly after 3am.  Low around 69. Northwest wind 5 to 7 mph becoming light and variable  in the evening.  Chance of precipitation is 80%.

    Low: 69 °F

    Scattered
    T-storms then
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 11am.  High near 84. Southeast wind around 6 mph becoming west in the morning.  Chance of precipitation is 80%.

    High: 84 °F

    T-storms then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Cloudy, then gradually becoming partly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm.

    Low: 69 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 85. Southwest wind 5 to 7 mph.

    High: 85 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Today
Scattered showers and thunderstorms after 4pm. Mostly sunny, with a high near 89. South wind 5 to 9 mph. Chance of precipitation is 30%.
Tonight
Showers and thunderstorms, mainly after 3am. Low around 69. Northwest wind 5 to 7 mph becoming light and variable in the evening. Chance of precipitation is 80%.
Thursday
Showers and thunderstorms, mainly before 11am. High near 84. Southeast wind around 6 mph becoming west in the morning. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Cloudy, then gradually becoming partly cloudy, with a low around 69. Southeast wind around 5 mph becoming calm.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Southwest wind 5 to 7 mph.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 70.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 93.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Dow IL
 39°N 90.33°W (Elev. 597 ft)
3:41 am CDT Aug 5, 2026
5am CDT Aug 5, 2026-6pm CDT Aug 11, 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