Did Chicago get a lot of snow in April in the ’60s?

Dear Tom,
Chicago had a heavy snowfall in early April sometime in the 1960s, I believe. Also, what are the dates for the latest sizable snows in Chicago?
— William
Dear William,
You are probably referring to a snowfall of 6.8 inches that occurred in April 15-17, 1961: 1.1 inches on the 15th, 5.4 inches on the 16th and 0.3 inches on the 17th. Temperatures were in the 30s during that three-day period. The heaviest late-season snow ever to fall in Chicago was 10.7 inches on April 1 and 2 in 1970: 8.2 inches on the 1st and 2.5 inches on the 2nd. The second-heaviest was an accumulation of 9.8 inches April 2 and 3, 1975: 9.4 inches and 0.4 inches. Since 1885, when snowfall records began, measurable snow has fallen on 11 days in May; the city’s latest measurable snow of the spring season occurred on May 11, 1966: 0.2 inches.