With a population of around 47,100, Gwynn Oak sits in Maryland, United States. The city operates in the Eastern Time Zone.
In 2025, Gwynn Oak recorded an average annual temperature of 55°F — about 1.1°F below the 30-year normal of 56°F. The hottest day reached 101°F in June; the coldest was 6°F in January. Total precipitation was 50 inches (wetter than usual). Snowfall totaled 6 inches, below the 19-inch average. The wettest month was May.
View current conditions and forecast for Gwynn Oak · More cities in Maryland