South Amboy is a city of approximately 8,800 people in New Jersey, United States. Located in the Eastern Time Zone at 40.5°N latitude.
In 2025, South Amboy recorded an average annual temperature of 55°F — right at the 30-year normal of 56°F. The hottest day reached 104°F in June; the coldest was 7°F in January. Total precipitation was 42 inches (drier than usual). Snowfall totaled 6 inches, below the 32-inch average. The wettest month was May.
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