Delevan is a city of approximately 1,100 people in New York, United States. Located in the Eastern Time Zone at 42.5°N latitude.
In 2025, Delevan recorded an average annual temperature of 46°F — about 3.2°F below the 30-year normal of 49°F. The hottest day reached 86°F in July; the coldest was -9°F in January. Total precipitation was 45 inches (wetter than usual). Snowfall totaled 32 inches, below the 95-inch average. The wettest month was May.
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