Lebanon, in Illinois, United States, is home to roughly 4,500 people in the Central Time Zone at 38.6°N latitude.
In 2025, Lebanon recorded an average annual temperature of 56°F — about 1.6°F below the 30-year normal of 58°F. The hottest day reached 94°F in July; the coldest was 0°F in February. Total precipitation was 44 inches (near normal). Snowfall totaled 6 inches, below the 11-inch average. The wettest month was April.
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