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.

Thunderstorm Rain

66°F

19°C

Humidity 96%
Wind Speed W 5 mph
Barometer 29.98 in (1014.4 mb)
Dewpoint 65°F (18°C)
Visibility 3.00 mi
Last update 20 Aug 2:54 am EDT
Extended Forecast for

Castleton IN

Flood Watch August 20, 03:45am until August 20, 08:00am
Flood Advisory until August 20, 07:00am
Click here for hazard details and duration
Flood Watch
Flood Advisory
  •  
    Flood Watch August 20, 03:45am until August 20, 08:00am
    Flood Advisory until August 20, 07:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 70 °F

    Scattered
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Calm wind becoming north around 6 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 63. North northeast wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81. Calm wind.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Scattered showers after 2am. Partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%.

    Low: 64 °F

    Partly Cloudy
    then
    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers before 8am, then scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 79. Light west southwest wind becoming west northwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    High: 79 °F

    Scattered
    Showers

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms before 8pm. Mostly clear, with a low around 60. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.

    Low: 60 °F

    Scattered
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. Light north northwest wind increasing to 5 to 9 mph in the morning.

    High: 76 °F

    Sunny

Detailed Forecast

Overnight
Scattered showers and thunderstorms. Patchy fog. Otherwise, cloudy, with a steady temperature around 70. Calm wind. Chance of precipitation is 30%.
Thursday
Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 80. Calm wind becoming north around 6 mph in the afternoon.
Thursday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 63. North northeast wind around 5 mph becoming calm in the evening.
Friday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 81. Calm wind.
Friday Night
Scattered showers after 2am. Partly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%.
Saturday
Scattered showers before 8am, then scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 79. Light west southwest wind becoming west northwest 6 to 11 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Saturday Night
Scattered showers and thunderstorms before 8pm. Mostly clear, with a low around 60. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 76. Light north northwest wind increasing to 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 76. Light north northeast wind.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castleton IN
 39.9°N 86.06°W (Elev. 823 ft)
Last Update:
3:23 am EDT Aug 20, 2026
Forecast Valid:
3am EDT Aug 20, 2026-6pm EDT Aug 26, 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