April 2020 Climate Summary

Overview & Graphics
Monthly Summary
Events

Overview & Graphics

April 2020 was cooler than normal overall after a mild start, driven especially by a mid month cold snap when there were a few accumulating snow events. This resulted in much of the area finishing the month well above normal snowfall wise and bringing the Fall-Spring seasonal snowfall closer to normal. Precipitation was below normal for most of the area until late in the month when there were two significant rainfall events. A swath from central Illinois to northeast Illinois and northwest Indiana finished with above normal rainfall due to these events. The April 28-29 rainfall event caused widespread river flooding in the affected areas.


Temperatures and Precipitation Summary	Snowfall Summary

Chicago and Rockford Monthly Summary

...A Look Back at the Climate for the Month of April 2020 for
Chicago and Rockford...

At Chicago, the average high temperature was 58.0 degrees, which
is 1 degrees below normal. The average low temperature was 38.7
degrees, which is 0.1 degrees below normal. The average
temperature for the month was 48.4 degrees which is 0.5 degrees
below normal. During the month of April, 3.81 inches of
precipitation were recorded, which is 0.43 inches above normal.
4.7 inches of snow were recorded, which is 3.5 inches above
normal.

Two records were set for Chicago for the month of April 2020:
* Record daily snowfall of 1.7 inches on the 15th.
* Record daily snowfall of 3.0 inches on the 17th.

At Rockford, the average high temperature was 58.0 degrees, which
is 2.7 degrees below normal. The average low temperature was 37.2
degrees, which is 0.9 degrees below normal. The average
temperature for the month was 47.6 degrees, which is 1.8 degrees
below normal. During the month of April, 2.79 inches of
precipitation were recorded, which is 0.56 inches below normal.
3.3 inches of snow were recorded, which is 2.4 inches above
normal.

One record was set for Rockford for the month of April 2020:
* Record daily snowfall of 3.0 inches on the 17th.

Monthly Climate Report: Chicago | Rockford

Events

April 7, 2020: Significant large hail to the size of baseballs near Rockford and in Evanston, IL
April 15, 2020: Quick hitting overnight snow causes icy overpasses and numerous accidents in Chicago
April 17, 2020: Late season two to five inches of snow
April 28-30 Heavy Rainfall Event: Some locations received 3-5" of rain, causing widespread river flooding

NWS Chicago Science and Past Events Page