by Snowfall in Pennsylvania is typically linked to the winter season, but there have been rare instances of measurable snow in May. While this is unusual, historical weather data confirms that measurable snow during this month has occurred in certain areas across the state.
When Does May Snowfall Occur in Pennsylvania?
According to the National Weather Service and regional climate archives, the chances of measurable snow in May are low, particularly in southeastern and central Pennsylvania. However, areas at higher elevations such as the Laurel Highlands, Pocono Mountains, and northern Pennsylvania experience a slightly higher likelihood of snowfall.
Notable May Snowstorms in Pennsylvania
Throughout history, Pennsylvania has witnessed some notable May snow events. One of the most significant occurred on May 9, 1923, when a late-season snowstorm blanketed parts of northeastern Pennsylvania with several inches of snow. More recently, on May 9, 2020, areas near Bradford and the Allegheny Plateau recorded measurable snowfall, with some locations receiving up to 3 inches.
Snowfall Trends in Major Cities
In major cities like Philadelphia, Pittsburgh, and Harrisburg, measurable snow in May is a rare occurrence. Over the past century, these cities have recorded little to no snow in May, with only trace amounts appearing on occasion. However, in select mountainous regions, measurable snow is seen roughly once every 10 to 20 years.
Is May Snowfall a Common Phenomenon?
While May snowfall in Pennsylvania is not typical, it is not entirely out of the question, especially in colder, elevated regions of the state. Historical patterns indicate that while it remains a rare event, it is still a possible weather occurrence.
