Showers and Storms in the East; Dangerously Hot and Dry in the West

A frontal boundary will bring scattered showers and storms to portions of the Central and Eastern U.S. through the end of the week. Meanwhile, dangerous heat will intensify across the Intermountain West and expand into the Central U.S. by early next week. Elevated wildfire conditions will develop across portions of the Northern/Central Plains and air quality issues will persist in the Northwest. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

77°F

25°C

Humidity 85%
Wind Speed E 7 mph
Barometer 30.01 in (1015.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 5 Aug 7:54 pm CDT
Extended Forecast for

3 Miles NNW Elsah IL

Flood Watch August 5, 10:00pm until August 6, 10:00am
Click here for hazard details and duration
Flood Watch
  • Tonight

    Tonight: Showers and thunderstorms, mainly after 3am. Some of the storms could produce heavy rainfall.  Low around 70. East wind around 6 mph becoming light and variable.  Chance of precipitation is 80%.

    Low: 70 °F

    Chance
    T-storms then
    Heavy Rain

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall.  High near 83. South wind around 6 mph.  Chance of precipitation is 80%.

    High: 83 °F

    Heavy Rain
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 11pm.  Mostly cloudy, with a low around 70. Southeast wind 3 to 5 mph.

    Low: 70 °F

    Chance
    T-storms

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Partly sunny, with a high near 88. South wind 5 to 7 mph becoming southwest in the afternoon.

    High: 88 °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. South wind 3 to 6 mph.

    Low: 71 °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: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms, mainly after 3am. Some of the storms could produce heavy rainfall. Low around 70. East wind around 6 mph becoming light and variable. Chance of precipitation is 80%.
Thursday
Showers and thunderstorms, mainly before 10am. Some of the storms could produce heavy rainfall. High near 83. South wind around 6 mph. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 11pm. Mostly cloudy, with a low around 70. Southeast wind 3 to 5 mph.
Friday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. South wind 5 to 7 mph becoming southwest in the afternoon.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 71. South wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 75.
Monday
Sunny, with a high near 93.
Monday Night
Partly cloudy, with a low around 76.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Elsah IL
 39°N 90.39°W (Elev. 640 ft)
7:31 pm CDT Aug 5, 2026
8pm CDT Aug 5, 2026-6pm CDT Aug 12, 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