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

73°F

23°C

Humidity 84%
Wind Speed Calm
Barometer 30.03 in (1016.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 4 Aug 10:54 pm CDT
Extended Forecast for

4 Miles W Grafton IL

  • Tonight

    Tonight: Mostly clear, with a low around 70. Southeast wind 3 to 5 mph.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 5pm.  Sunny, then becoming partly sunny during the afternoon, with a high near 89. South wind 3 to 8 mph.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 3am.  Mostly cloudy, with a low around 71. Northeast wind 5 to 8 mph becoming light and variable  after midnight.  Chance of precipitation is 70%.

    Low: 71 °F

    T-storms
    Likely

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am.  High near 84. East wind around 5 mph becoming light and variable  in the afternoon.  Chance of precipitation is 80%.

    High: 84 °F

    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 70. Light and variable wind.

    Low: 70 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Saturday

    Saturday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 70. Southeast wind 3 to 5 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Sunny, then becoming partly sunny during the afternoon, with a high near 89. South wind 3 to 8 mph.
Wednesday Night
Showers and thunderstorms likely, mainly after 3am. Mostly cloudy, with a low around 71. Northeast wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 70%.
Thursday
Showers and thunderstorms, mainly before 10am. High near 84. East wind around 5 mph becoming light and variable in the afternoon. Chance of precipitation is 80%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light and variable wind.
Friday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 86.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 71.
Saturday
Sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Mostly sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 76.
Monday
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 77.
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:
4 Miles W Grafton IL
 38.98°N 90.5°W (Elev. 620 ft)
9:41 pm CDT Aug 4, 2026
10pm CDT Aug 4, 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