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

Plymouth (KC65)

Lat: 41.37°NLon: 86.3°WElev: 801ft.

A Few Clouds

75°F

24°C

Humidity 65%
Wind Speed NW 5 mph
Barometer 30.05 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 21 Aug 3:35 pm EDT
Extended Forecast for

Koontz Lake IN

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. Southwest wind around 5 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Calm wind becoming southwest around 5 mph after midnight. Chance of precipitation is 50%.

    Low: 64 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 77. West wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers between 3am and 4am. Partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 59 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 74. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. Southwest wind around 5 mph.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Calm wind becoming southwest around 5 mph after midnight. Chance of precipitation is 50%.
Saturday
Mostly sunny, with a high near 77. West wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
A slight chance of showers between 3am and 4am. Partly cloudy, with a low around 59. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 74. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Sunday Night
Mostly clear, with a low around 53.
Monday
Mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 55.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 62.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Koontz Lake IN
 41.41°N 86.48°W (Elev. 696 ft)
Last Update:
1:30 pm CDT Aug 21, 2026
Forecast Valid:
2pm CDT Aug 21, 2026-6pm CDT Aug 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