Maryland : Climatic Conditions

Maryland has a wide diversity in its weather conditions. Temperatures vary from an annual average of 48°F (9°C) in the extreme western uplands to 59°F (15°C) in the southeast, where the climate is controlled by the Chesapeake Bay and the Atlantic Ocean. The daily mean temperature for Baltimore is 55°F (13°C), ranging from 33°F (1°C) in January to 77°F (25°C) in July. Precipitation averages about 49 inches (124 cm) annually in the southeast, but only 36 inches (91 cm) in the Cumberland area west of the Appalachians.  Western Garret County receives as much as 100 in (254 cm) of snow falls while the Eastern Shore receives 8–10 in (20–25 cm) of snowfall.