With a population of around 9,000, Glenshaw sits in Pennsylvania, United States. The city operates in the Eastern Time Zone.
In 2025, Glenshaw recorded an average annual temperature of 52°F — about 0.8°F below the 30-year normal of 52°F. The hottest day reached 93°F in June; the coldest was -14°F in January. Total precipitation was 51 inches (wetter than usual). The wettest month was June.
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