Hanover, in New Jersey, United States, is home to roughly 12,900 people in the Eastern Time Zone at 40.8°N latitude.
In 2025, Hanover recorded an average annual temperature of 53°F — about 2.4°F below the 30-year normal of 56°F. The hottest day reached 99°F in June; the coldest was 4°F in January. Total precipitation was 42 inches (drier than usual). Snowfall totaled 8 inches, below the 32-inch average. The wettest month was May.
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