Saint Marys is a city of approximately 13,100 people in Pennsylvania, United States. Located in the Eastern Time Zone at 41.4°N latitude.
In 2025, Saint Marys recorded an average annual temperature of 47°F — about 0.9°F below the 30-year normal of 48°F. The hottest day reached 88°F in August; the coldest was -18°F in January. Total precipitation was 42 inches (near normal). The wettest month was May.
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