ILLINOIS — While snow is typically associated with winter months, measurable snowfall in May is not impossible in Illinois.
Though rare, past weather data shows that late-season snow events have occurred in the state’s history, especially in northern and central regions.
According to the National Weather Service, cities like Chicago and Rockford have recorded measurable snowfall in May, with some events bringing up to an inch or more.
For example, Chicago received 1.3 inches of snow on May 1, 1940, and traces of snow have been documented in other years as well.
These events usually occur when unusually cold air masses move across the region, meeting lingering spring moisture.
While not common, such conditions can still align in early May, particularly in the northern half of the state.
Southern Illinois is far less likely to see snow this late in the season, but flurries are not entirely out of the question.
