Stony Brook, in New York, United States, is home to roughly 13,700 people in the Eastern Time Zone at 40.9°N latitude.
In 2025, Stony Brook recorded an average annual temperature of 54°F — right at the 30-year normal of 53°F. The hottest day reached 105°F in June; the coldest was 7°F in January. Total precipitation was 42 inches (drier than usual). Snowfall totaled 7 inches, below the 32-inch average. The wettest month was May.
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