Green Valley is a city of approximately 12,300 people in Maryland, United States. Located in the Eastern Time Zone at 39.3°N latitude.
In 2025, Green Valley recorded an average annual temperature of 55°F — about 0.8°F below the 30-year normal of 56°F. The hottest day reached 97°F in June; the coldest was 1°F in January. Total precipitation was 43 inches (near normal). Snowfall totaled 6 inches, below the 21-inch average. The wettest month was May.
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