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

Heavy Rain and Flash Flooding in the West; Heat Expands in the Central U.S.

Monsoonal moisture will produce showers and thunderstorms with heavy rain over parts of the Southwest, Great Basin, and Central Rockies through Monday. Flash flooding is possible, especially in and around burn scars and in areas of steep terrain. Heat will persist across the Central U.S. early this week, spreading into the Ohio Valley and Mid-Atlantic later this week. Read More >

Hazardous Weather Conditions

Current conditions at

Jacksonville Municipal Airport (KIJX)

Lat: 39.77°NLon: 90.24°WElev: 614ft.

Fair

84°F

29°C

Humidity 53%
Wind Speed SE 6 mph
Barometer 29.96 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 30 Aug 7:15 pm CDT
Extended Forecast for

8 Miles N Meredosia IL

Heat Advisory August 31, 12:00pm until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 72. South wind 6 to 8 mph.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny and hot, with a high near 97. Heat index values as high as 102. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South wind 6 to 8 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 99. Heat index values as high as 105. South wind around 6 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 77. South wind 3 to 6 mph.

    Low: 77 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74.

    Low: 74 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 72. South wind 6 to 8 mph.
Monday
Mostly sunny and hot, with a high near 97. Heat index values as high as 102. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 75. South wind 6 to 8 mph.
Tuesday
Sunny and hot, with a high near 99. Heat index values as high as 105. South wind around 6 mph.
Tuesday Night
Clear, with a low around 77. South wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 76.
Thursday
Mostly sunny, with a high near 94.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 70.
Saturday
A 20 percent chance of showers. Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles N Meredosia IL
 39.93°N 90.55°W (Elev. 472 ft)
Last Update:
5:31 pm CDT Aug 30, 2026
Forecast Valid:
7pm CDT Aug 30, 2026-6pm CDT Sep 6, 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