Extreme Heat in the Southwest; Severe Weather in the Northern Plains; Heavy Rain in the East

Extreme heat continues across the Southwest as temperatures may top 120 degrees. The heat may expand across the West and south-central U.S. into the middle of the month. Severe thunderstorms capable of severe wind gusts and large hail will be the primary hazards today across the northern Plains into the upper Midwest. Rainfall could be locally heavy across the Eastern U.S. today. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

63°F

17°C

Humidity 97%
Wind Speed Calm
Barometer 29.96 in (1014.0 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 3 Aug 5:54 am CDT
Extended Forecast for

3 Miles ESE Dow IL

  • Today

    Today: Sunny, with a high near 84. Light north wind.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 63. East wind 3 to 5 mph.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 87. South wind 3 to 5 mph.

    High: 87 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66. Southeast wind 3 to 5 mph.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89. South wind 3 to 6 mph.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly after 1am.  Mostly cloudy, with a low around 69. Chance of precipitation is 60%.

    Low: 69 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 67.

    Low: 67 °F

    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 85.

    High: 85 °F

    Slight Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 84. Light north wind.
Tonight
Mostly clear, with a low around 63. East wind 3 to 5 mph.
Tuesday
Sunny, with a high near 87. South wind 3 to 5 mph.
Tuesday Night
Mostly clear, with a low around 66. Southeast wind 3 to 5 mph.
Wednesday
Sunny, with a high near 89. South wind 3 to 6 mph.
Wednesday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Thursday
Showers likely and possibly a thunderstorm before 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 67.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 91.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Dow IL
 39.04°N 90.27°W (Elev. 600 ft)
4:21 am CDT Aug 3, 2026
6am CDT Aug 3, 2026-6pm CDT Aug 9, 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