Illinois Experiences Record Cold Mays Since 1895
Illinois has seen some of its coldest Mays on record since 1895, according to data compiled by the National Centers for Environmental Information. The rankings are based on average monthly temperatures, with May 1917 being the coldest at an average of 55.8°F (13.2°C). Other notable years include May 1907 and May 1924, both tied at 55.9°F (13.3°C). These months also experienced relatively low monthly high temperatures, such as 67.4°F (19.7°C) in May 1917, and significant precipitation levels, with May 1935 recording the highest at 7.83 inches. The data highlights the variability in spring weather patterns across the state, with cooler-than-average temperatures and varying precipitation levels shaping the historical climate trends. 
