Lemmon, in South Dakota, United States, is home to roughly 1,200 people in the Mountain Time Zone at 45.9°N latitude.
In 2025, Lemmon recorded an average annual temperature of 45°F. The hottest temperatures reached 98°F in July; the coolest were -29°F in February. Total precipitation for the year was 28 inches, with the wettest month being May. Snowfall for the year totaled approximately 9 inches.
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