Syosset, in New York, United States, is home to roughly 18,800 people in the Eastern Time Zone at 40.8°N latitude.
In 2025, Syosset recorded an average annual temperature of 53°F — right at the 30-year normal of 54°F. The hottest day reached 104°F in June; the coldest was 5°F in January. Total precipitation was 45 inches (wetter than usual). The wettest month was May.
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