Ten Coldest March’s and What Follows

As previously reported, based on preliminary data this March in Illinois was 34.1 degrees and the 11th coldest March on record. What were the ten coldest March’s on record? I have listed them in the table below. Also I looked to see what happened in April after these chilly March’s. It turns out that half are above average and half are below average – a virtual coin toss.

The columns labeled “Depart” are the departures from the 1981-2010 statewide averages. Probably the biggest turnaround was between March 1960, which was the coldest March on record and 15.5 degrees below average, compared to April 1960 which was 2.2 degrees above average. The statewide temperature records go back to 1895. 

Rank Year March Depart April Depart
1 1960 25.6 -15.5 54.6 2.2
2 1906 30.3 -10.8 54.5 2.1
3 1912 30.4 -10.7 52.6 0.2
4 1965 31.1 -10.0 52.9 0.5
5 1984 33.0 -8.1 49.8 -2.6
6 1932 33.2 -7.9 52.1 -0.3
7 1978 33.5 -7.6 52.5 0.1
8 1989 33.5 -7.6 51.1 -1.3
9 1947 33.8 -7.3 51.0 -1.4
10 1926 34.0 -7.1 45.4 -7.0
11 2013 34.1 -7.0 ?? ??

BTW, so far this April has been cool. The first 7 days averaged 44.4 degrees statewide, and about 3 degrees below average.

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