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

61°F

16°C

Humidity 100%
Wind Speed NE 2 mph
Barometer 30.17 in
Dewpoint 61°F (16°C)
Visibility 8.00 mi
Last update 4 Oct 3:55 am CDT
Extended Forecast for

Sullivan IN

  • Today

    Today: Sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. Light south southeast wind.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 85. Light south southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63. South southeast wind around 6 mph.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 84. South wind 5 to 8 mph. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 63. South wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 77. Calm wind becoming west 5 to 7 mph in the morning. Chance of precipitation is 70%.

    High: 77 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. North wind around 7 mph. Chance of precipitation is 30%.

    Low: 53 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A 10 percent chance of showers before 8am. Sunny, with a high near 71. Northeast wind 7 to 9 mph.

    High: 71 °F

    Slight Chance
    Showers then
    Sunny

Detailed Forecast

Today
Sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Mostly clear, with a low around 60. Light south southeast wind.
Sunday
Sunny, with a high near 85. Light south southeast wind becoming south 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Sunday Night
Mostly clear, with a low around 63. South southeast wind around 6 mph.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 84. South wind 5 to 8 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 63. South wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 77. Calm wind becoming west 5 to 7 mph in the morning. Chance of precipitation is 70%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. North wind around 7 mph. Chance of precipitation is 30%.
Wednesday
A 10 percent chance of showers before 8am. Sunny, with a high near 71. Northeast wind 7 to 9 mph.
Wednesday Night
Mostly clear, with a low around 46. East northeast wind around 7 mph.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 44.
Friday
Sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sullivan IN
 39.1°N 87.41°W (Elev. 502 ft)
Last Update:
5:11 am EDT Oct 4, 2025
Forecast Valid:
5am EDT Oct 4, 2025-6pm EDT Oct 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation