Grayville, in Illinois, United States, is home to roughly 1,600 people in the Central Time Zone at 38.3°N latitude.
In 2025, Grayville recorded an average annual temperature of 57°F — about 0.7°F below the 30-year normal of 57°F. The hottest day reached 92°F in July; the coldest was -3°F in January. Total precipitation was 44 inches (drier than usual). Snowfall totaled 7 inches, below the 11-inch average. The wettest month was April.
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