We have not seen a 60 this March and that seems unusual. How rare is that?
March 2018 has been a cool one with the month’s highest temperature just 57 degrees on the 18th. Chicago weather historian Frank Wachowski tell us that dating back to 1871, it becomes only the city’s 25th March that has failed to reach 60 and the first one since 2013. Other recent Marches that never reached 60 include 2001, 1984, 1980, 1970, 1958, 1956 and 1947. The other sixteen all occurred prior to 1942 when the city’s official thermometer was located near Lake Michigan with a typical March water temperature in the 30s. The increased number of occurrences are easily explained by the month’s preponderance of east or northeast winds blowing onshore off the chilly lake.