Koontz Lake is a city of approximately 1,600 people in Indiana, United States. Located in the America/Indiana/Knox time zone at 41.4°N latitude.
In 2025, Koontz Lake recorded an average annual temperature of 51°F. The hottest temperatures reached 91°F in June; the coolest were -5°F in January. Total precipitation for the year was 37 inches, with the wettest month being March. Snowfall for the year totaled approximately 13 inches.
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