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

Hazardous Weather Conditions

Current conditions at

Indianapolis International Airport (KIND)

Lat: 39.73°NLon: 86.28°WElev: 790ft.

A Few Clouds

83°F

28°C

Humidity 72%
Wind Speed SE 5 mph
Barometer 29.99 in (1014.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 4 Sep 12:54 am EDT
Extended Forecast for

Castleton IN

Heat Advisory September 4, 01:00am until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory September 4, 01:00am until September 4, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: Isolated showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Heat index values as high as 104. West wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 95 °F

    Sunny then
    Isolated
    T-storms

  • Friday Night

    Friday Night: Isolated showers and thunderstorms before 9pm, then a chance of showers and thunderstorms after 2am. Mostly clear, with a low around 73. Light west southwest wind. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 65. East northeast wind 5 to 7 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 83. East northeast wind 6 to 10 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. East northeast wind 5 to 8 mph.

    Low: 61 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 84. East northeast wind 5 to 7 mph.

    High: 84 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 74. Light south southwest wind.
Friday
Isolated showers and thunderstorms after 2pm. Sunny and hot, with a high near 95. Heat index values as high as 104. West wind 3 to 7 mph. Chance of precipitation is 20%.
Friday Night
Isolated showers and thunderstorms before 9pm, then a chance of showers and thunderstorms after 2am. Mostly clear, with a low around 73. Light west southwest wind. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms before 11am, then a chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon. Chance of precipitation is 40%.
Saturday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 65. East northeast wind 5 to 7 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 83. East northeast wind 6 to 10 mph.
Sunday Night
Mostly clear, with a low around 61. East northeast wind 5 to 8 mph.
Labor Day
Sunny, with a high near 84. East northeast wind 5 to 7 mph.
Monday Night
Partly cloudy, with a low around 64. East northeast wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 89. South wind 3 to 6 mph.
Tuesday Night
Partly cloudy, with a low around 71.
Wednesday
Mostly sunny and hot, with a high near 93.
Wednesday Night
A 20 percent chance of showers. Partly cloudy, with a low around 72.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castleton IN
 39.9°N 86.06°W (Elev. 823 ft)
Last Update:
12:46 am EDT Sep 4, 2026
Forecast Valid:
1am EDT Sep 4, 2026-6pm EDT Sep 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation