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Maryland - Humid, Temperate, Atlantic: Maryland has two climates. It is continental in the highland west, with temperature records from −40 °F (−40 °C) to more than 100 °F (38 °C). Average temperatures in western Maryland are 65 °F (18 °C) in July and 28 °F (−2 °C) in January.
It is noteworthy that Dundalk experiences a considerable volume of precipitation throughout the year, including its least humid month. The climate is classified as Cfa according to Köppen and Geiger.
The eastern half has a humid subtropical climate (Köppen climate classification Cfa) due to proximity to the ocean. The western half has an oceanic climate (Köppen Cfb) that changes to humid continental (Köppen Dfa) from the Cumberland Valley onwards to the remaining western portion.
The higher atmospheric humidity along the Atlantic coastal area causes the summer heat to be more oppressive and the winter cold more penetrating than for drier climates of the interior of the continent. Mountain Barriers and Topographic Features:
Climate and Average Weather Year Round in Maryland. United States. We show the climate in Maryland by comparing the average weather in 2 representative places: Baltimore and Cumberland. You can add or remove cities to customize the report to your liking. See all locations in Maryland.
Maryland and the District of Columbia (DC) are located on the eastern coast of the North American continent. Their geographic location exposes them to both the cold winter and warm summer air masses from the continental interior and the moderate and moist air masses from the Atlantic Ocean.
July, August and June are the three most uncomfortably humid months in the state of Maryland. July is the wettest month in Maryland with 4.2 inches of rain, and the driest month is February with 2.9 inches.
