Fullerton, in Pennsylvania, United States, is home to roughly 14,900 people in the Eastern Time Zone at 40.6°N latitude.
In 2025, Fullerton recorded an average annual temperature of 53°F — about 0.6°F below the 30-year normal of 53°F. The hottest day reached 96°F in June; the coldest was -2°F in January. Total precipitation was 37 inches (drier than usual). Snowfall totaled 8 inches, below the 33-inch average. The wettest month was May.
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