Climate
Pennsylvania has three general climate regions, which are determined by altitude more than latitude or distance from the oceans. Most of the state falls in the humid continental climate zone. The lower elevations, including most of the major cities, has a moderate continental climate (Köppen climate classification Dfa), with cool to cold winters and hot, humid summers. Highland areas have a more severe continental climate (Köppen Dfb) with warm, humid summers and cold, more severe and snowy winters. Extreme southeastern Pennsylvania, around Philadelphia borders into a humid subtropical climate (Köppen Cfa), with milder winters and hot, humid summers.
Precipitation is abundant throughout the state, as the primary climatic influences are the Atlantic Ocean and the Gulf of Mexico, plus Arctic influences that cross over the Great Lakes.
Read more about this topic: Geography Of Pennsylvania
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