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

Robinson Municipal Airport (KRSV)

Lat: 39.01°NLon: 87.65°WElev: 449ft.

Fair

52°F

11°C

Humidity 67%
Wind Speed NW 3 mph
Barometer 30.00 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 6 May 9:35 pm CDT
Extended Forecast for

Flat Rock IL

  • Tonight

    Tonight: Mostly clear, with a low around 41. North wind 3 to 6 mph.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny through mid morning, then becoming sunny, with a high near 63. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 63 °F

    Becoming
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 70. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 70 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Showers, mainly before 1am. Low around 52. South southwest wind 5 to 7 mph becoming west northwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Showers

  • Saturday

    Saturday: Sunny, with a high near 76. Southwest wind 5 to 8 mph.

    High: 76 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Mostly clear, with a low around 57. South wind 3 to 6 mph.

    Low: 57 °F

    Mostly Clear
    then Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 71. Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 41. North wind 3 to 6 mph.
Thursday
Partly sunny through mid morning, then becoming sunny, with a high near 63. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
Mostly clear, with a low around 47. South southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Friday
Increasing clouds, with a high near 70. Southwest wind 9 to 14 mph, with gusts as high as 22 mph.
Friday Night
Showers, mainly before 1am. Low around 52. South southwest wind 5 to 7 mph becoming west northwest after midnight. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Sunny, with a high near 76. Southwest wind 5 to 8 mph.
Saturday Night
A 30 percent chance of showers after 1am. Mostly clear, with a low around 57. South wind 3 to 6 mph.
Sunday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 71. Chance of precipitation is 70%.
Sunday Night
Partly cloudy, with a low around 47.
Monday
Sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 49.
Tuesday
A chance of showers. Mostly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 56.
Wednesday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Flat Rock IL
 38.91°N 87.68°W (Elev. 502 ft)
Last Update:
9:36 pm CDT May 6, 2026
Forecast Valid:
10pm CDT May 6, 2026-6pm CDT May 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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