West Islip, in New York, United States, is home to roughly 28,300 people in the Eastern Time Zone at 40.7°N latitude.
In 2025, West Islip recorded an average annual temperature of 54°F — right at the 30-year normal of 54°F. The hottest day reached 98°F in June; the coldest was 8°F in January. Total precipitation was 46 inches (wetter than usual). The wettest month was May.
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