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

Indianapolis International Airport (KIND)

Lat: 39.73°NLon: 86.28°WElev: 790ft.

Overcast

59°F

15°C

Humidity 72%
Wind Speed NE 10 mph
Barometer 30.19 in (1022.1 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 20 May 11:54 pm EDT
Extended Forecast for

Castleton IN

  • Overnight

    Overnight: Mostly cloudy, with a low around 50. East northeast wind 6 to 8 mph.

    Low: 50 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 69. East northeast wind 11 to 14 mph, with gusts as high as 23 mph.

    High: 69 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 52. East northeast wind 8 to 11 mph, with gusts as high as 18 mph.

    Low: 52 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers, then showers and possibly a thunderstorm after 2pm. High near 71. East wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Slight Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 63. East wind around 9 mph becoming south after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. West southwest wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 62. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Light and variable wind. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 50. East northeast wind 6 to 8 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 69. East northeast wind 11 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Partly cloudy, with a low around 52. East northeast wind 8 to 11 mph, with gusts as high as 18 mph.
Friday
A slight chance of showers, then showers and possibly a thunderstorm after 2pm. High near 71. East wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 63. East wind around 9 mph becoming south after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. West southwest wind around 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A slight chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 62. West southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. Light and variable wind. Chance of precipitation is 30%.
Memorial Day
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. East wind 3 to 6 mph. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Tuesday
A 40 percent chance of showers. Mostly cloudy, with a high near 81.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castleton IN
 39.92°N 86.06°W (Elev. 801 ft)
Last Update:
12:15 am EDT May 21, 2026
Forecast Valid:
12am EDT May 21, 2026-6pm EDT May 27, 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