Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

A Few Clouds

86°F

30°C

Humidity 63%
Wind Speed SE 10 mph
Barometer 30.19 in (1021.9 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 16 Sep 5:54 pm CDT
Extended Forecast for

5 Miles SW Elsberry MO

Heat Advisory September 16, 06:55pm until September 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 16, 06:55pm until September 18, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 73 °F

    Clearing Late

  • Thursday

    Thursday: Sunny, with a high near 93. Heat index values as high as 101. West wind 3 to 7 mph.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 72. Southwest wind around 5 mph becoming light and variable  after midnight.

    Low: 72 °F

    Mostly Clear

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 91. Northeast wind around 5 mph becoming light and variable  in the afternoon.

    High: 91 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. Calm wind becoming south around 6 mph after midnight.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 1pm.  Partly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, then gradual clearing toward daybreak, with a low around 73. Light south wind.
Thursday
Sunny, with a high near 93. Heat index values as high as 101. West wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around 72. Southwest wind around 5 mph becoming light and variable after midnight.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 91. Northeast wind around 5 mph becoming light and variable in the afternoon.
Friday Night
Mostly clear, with a low around 73. Calm wind becoming south around 6 mph after midnight.
Saturday
Mostly sunny, with a high near 92.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 71.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 86. Chance of precipitation is 30%.
Sunday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 81. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 63.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 78.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SW Elsberry MO
 39.12°N 90.87°W (Elev. 899 ft)
6:06 pm CDT Sep 16, 2026
6pm CDT Sep 16, 2026-6pm CDT Sep 23, 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