Jamesburg, in New Jersey, United States, is home to roughly 6,000 people in the Eastern Time Zone at 40.4°N latitude.
In 2025, Jamesburg recorded an average annual temperature of 55°F — right at the 30-year normal of 54°F. The hottest day reached 101°F in June; the coldest was 6°F in January. Total precipitation was 41 inches (drier than usual). Snowfall totaled 6 inches, below the 27-inch average. The wettest month was May.
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