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

Hazardous Weather Conditions

Current conditions at

Robinson Municipal Airport (KRSV)

Lat: 39.01°NLon: 87.65°WElev: 449ft.

Fog/Mist

77°F

25°C

Humidity 94%
Wind Speed E 6 mph
Barometer 30.07 in
Dewpoint 75°F (24°C)
Visibility 6.00 mi
Heat Index78°F (26°C)
Last update 14 Aug 8:35 pm CDT
Extended Forecast for

Flat Rock IL

Heat Advisory August 14, 08:45pm until August 16, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 14, 08:45pm until August 16, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • Tonight

    Low: 74 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 96. Heat index values as high as 106. South wind 5 to 8 mph becoming west southwest in the afternoon.

    High: 96 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. Southwest wind around 6 mph.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 95. Heat index values as high as 105. West wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 95 °F

    Hot

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 72. North northwest wind 3 to 7 mph. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 87. North wind 5 to 8 mph.

    High: 87 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 65. North wind 5 to 7 mph becoming calm in the evening.

    Low: 65 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 74. East wind 3 to 5 mph.
Saturday
Mostly sunny and hot, with a high near 96. Heat index values as high as 106. South wind 5 to 8 mph becoming west southwest in the afternoon.
Saturday Night
Mostly clear, with a low around 75. Southwest wind around 6 mph.
Sunday
Mostly sunny and hot, with a high near 95. Heat index values as high as 105. West wind 6 to 10 mph, with gusts as high as 16 mph.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. North northwest wind 3 to 7 mph. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 87. North wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around 65. North wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 92.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 69.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Partly cloudy, with a low around 65.
Friday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Flat Rock IL
 38.91°N 87.68°W (Elev. 502 ft)
Last Update:
7:32 pm CDT Aug 14, 2026
Forecast Valid:
8pm CDT Aug 14, 2026-6pm CDT Aug 21, 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