PENNSYLVANIA — While snowfall in Pennsylvania is typically associated with the winter months, historical weather records show that measurable snow in May, though rare, has occurred on several occasions across the state.
According to data from the National Weather Service and regional climate archives, the probability of measurable May snowfall in Pennsylvania is generally low, particularly in the southeastern and central parts of the state.
However, the chance increases slightly in higher elevation areas such as the Laurel Highlands, the Pocono Mountains, and portions of northern Pennsylvania.
Some of the most notable May snow events include a late-season snowstorm on May 9, 1923, which dropped several inches of snow across parts of northeastern Pennsylvania.
More recently, on May 9, 2020, areas near Bradford and the Allegheny Plateau recorded measurable snowfall, with some locations reporting up to 3 inches.
Statistically, most major cities such as Philadelphia, Pittsburgh, and Harrisburg have recorded trace amounts or no measurable snow in May over the past century.
In contrast, select highland and mountainous areas have experienced occasional measurable snow roughly once every 10 to 20 years.
While May snowfall in Pennsylvania is not the norm, historical patterns confirm that it remains a rare but possible weather phenomenon, especially in colder, elevated regions of the state.
