Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Current conditions at

St. Louis Regional Airport (KALN)

Lat: 38.89°NLon: 90.03°WElev: 518ft.

Fair

91°F

33°C

Humidity 59%
Wind Speed SW 10 mph
Barometer 29.96 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 11 Aug 12:50 pm CDT
Extended Forecast for

Eagarville IL

Heat Advisory August 11, 01:39pm until August 12, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 11, 01:39pm until August 12, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • This Afternoon

    High: 94 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 74. Southwest wind around 6 mph.

    Low: 74 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly after 2pm.  Mostly sunny, with a high near 94. Heat index values as high as 105. South wind 5 to 8 mph becoming west in the afternoon.  Chance of precipitation is 30%.

    High: 94 °F

    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms, mainly after 3am.  Partly cloudy, with a low around 72. South wind 3 to 5 mph.  Chance of precipitation is 30%.

    Low: 72 °F

    Scattered
    T-storms

  • Thursday

    Thursday: Scattered showers and thunderstorms, mainly before 7am.  Partly sunny, with a high near 92. Light and variable wind becoming south around 6 mph in the morning.  Chance of precipitation is 30%.

    High: 92 °F

    Scattered
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 91.

    High: 91 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 94. Heat index values as high as 106. Southwest wind around 9 mph.
Tonight
Partly cloudy, with a low around 74. Southwest wind around 6 mph.
Wednesday
Scattered showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 105. South wind 5 to 8 mph becoming west in the afternoon. Chance of precipitation is 30%.
Wednesday Night
Scattered showers and thunderstorms, mainly after 3am. Partly cloudy, with a low around 72. South wind 3 to 5 mph. Chance of precipitation is 30%.
Thursday
Scattered showers and thunderstorms, mainly before 7am. Partly sunny, with a high near 92. Light and variable wind becoming south around 6 mph in the morning. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Friday
Partly sunny, with a high near 91.
Friday Night
Partly cloudy, with a low around 72.
Saturday
Mostly sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Sunny, with a high near 93.
Sunday Night
Partly cloudy, with a low around 70.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Eagarville IL
 39.12°N 89.78°W (Elev. 617 ft)
1:26 pm CDT Aug 11, 2026
1pm CDT Aug 11, 2026-6pm CDT Aug 17, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database