With a population of around 33,800, Olney sits in Maryland, United States. The city operates in the Eastern Time Zone.
In 2025, Olney recorded an average annual temperature of 55°F — about 0.8°F below the 30-year normal of 56°F. The hottest day reached 100°F in June; the coldest was 6°F in January. Total precipitation was 49 inches (wetter than usual). Snowfall totaled 6 inches, below the 19-inch average. The wettest month was May.
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