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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

69°F

21°C

Humidity 84%
Wind Speed S 6 mph
Barometer 29.99 in (1015.2 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 31 Aug 1:53 am CDT
Extended Forecast for

Venice IL

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

  • Overnight

    Overnight: Mostly clear, with a low around 72. South wind around 6 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 6 to 9 mph.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78. South wind 5 to 7 mph.

    Low: 78 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 102. Heat index values as high as 105. South wind 3 to 6 mph.

    High: 102 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 80. South wind around 6 mph.

    Low: 80 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 81.

    Low: 81 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 80.

    Low: 80 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 72. South wind around 6 mph.
Monday
Sunny and hot, with a high near 100. Heat index values as high as 104. South wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 78. South wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 102. Heat index values as high as 105. South wind 3 to 6 mph.
Tuesday Night
Clear, with a low around 80. South wind around 6 mph.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
Mostly clear, with a low around 81.
Thursday
Sunny and hot, with a high near 101.
Thursday Night
Mostly clear, with a low around 80.
Friday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96.
Friday Night
Mostly clear, with a low around 77.
Saturday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 95.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Mostly sunny, with a high near 93.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Venice IL
 38.66°N 90.17°W (Elev. 404 ft)
Last Update:
1:26 am CDT Aug 31, 2026
Forecast Valid:
2am CDT Aug 31, 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