With a population of around 8,300, Mill Creek sits in Pennsylvania, United States. The city operates in the Eastern Time Zone.
In 2025, Mill Creek recorded an average annual temperature of 56°F. The hottest temperatures reached 103°F in June; the coolest were 7°F in January. Total precipitation for the year was 39 inches, with the wettest month being May. Snowfall for the year totaled approximately 5 inches.
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