La Harpe is a city of approximately 1,200 people in Illinois, United States. Located in the Central Time Zone at 40.6°N latitude.
In 2025, La Harpe recorded an average annual temperature of 54°F. The hottest temperatures reached 97°F in May; the coolest were -8°F in January. Total precipitation for the year was 29 inches, with the wettest month being July. Snowfall for the year totaled approximately 8 inches.
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