National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms in the Central Plains and Lower Missouri Valley; Heat Continues in the Southeast and Southwest

Severe thunderstorms capable of large hail and damaging wind gusts are forecast to impact the central Plains into the Lower Missouri Valley through this afternoon. Dangerous heat persists across the southern Plains, Southeast U.S. and Puerto Rico this week, and will return to the Southwest today. Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

70°F

21°C

Humidity 93%
Wind Speed Calm
Barometer 30.06 in (1017.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Aug 7:53 am CDT
Extended Forecast for

Freeburg IL

  • Today

    Today: Sunny, with a high near 86. Calm wind becoming south around 5 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Scattered showers and thunderstorms between 4am and 5am, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 70. Light and variable wind becoming southeast around 5 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms, mainly before 10am. High near 83. Southeast wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 80%.

    High: 83 °F

    T-storms then
    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Light northeast wind. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the morning.

    High: 82 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 86. Calm wind becoming south around 5 mph.
Tonight
Scattered showers and thunderstorms between 4am and 5am, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 70. Light and variable wind becoming southeast around 5 mph. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms, mainly before 10am. High near 83. Southeast wind 5 to 7 mph becoming light and variable in the afternoon. Chance of precipitation is 80%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Light northeast wind. Chance of precipitation is 60%.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 82. Calm wind becoming northeast around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
A 20 percent chance of showers. Partly cloudy, with a low around 65.
Monday
A 20 percent chance of showers. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Freeburg IL
 38.43°N 89.9°W (Elev. 502 ft)
Last Update:
5:21 am CDT Aug 18, 2026
Forecast Valid:
8am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation