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.

Fog/Mist

41°F

5°C

Humidity 100%
Wind Speed Calm
Barometer 29.93 in
Dewpoint 41°F (5°C)
Visibility 3.00 mi
Last update 15 Feb 7:55 pm EST
Extended Forecast for

Koontz Lake IN

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, increasing clouds, with a low around 32. Calm wind becoming south around 5 mph after midnight.

    Low: 32 °F

    Mostly Clear
    then Patchy
    Fog

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 58. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 58 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. Southwest wind 5 to 10 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 56. South wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 56 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain likely, mainly after midnight. Cloudy, with a low around 50. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Low: 50 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday

    Wednesday: A chance of rain and thunderstorms before 9am, then a chance of rain between 9am and noon. Mostly sunny, with a high near 66. Chance of precipitation is 50%.

    High: 66 °F

    Chance Rain
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

Detailed Forecast

Tonight
Patchy fog after 1am. Otherwise, increasing clouds, with a low around 32. Calm wind becoming south around 5 mph after midnight.
Washington's Birthday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 58. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 38. Southwest wind 5 to 10 mph.
Tuesday
Mostly cloudy, with a high near 56. South wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday Night
Rain likely, mainly after midnight. Cloudy, with a low around 50. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.
Wednesday
A chance of rain and thunderstorms before 9am, then a chance of rain between 9am and noon. Mostly sunny, with a high near 66. Chance of precipitation is 50%.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
A 30 percent chance of rain after noon. Partly sunny, with a high near 61.
Thursday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 46.
Friday Night
A 30 percent chance of rain. Partly cloudy, with a low around 28.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 40.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 25.
Sunday
A slight chance of snow. Partly sunny, with a high near 36.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Koontz Lake IN
 41.41°N 86.48°W (Elev. 696 ft)
Last Update:
5:45 pm CST Feb 15, 2026
Forecast Valid:
7pm CST Feb 15, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation