Illinois May Weather

Illinois weather averages and all-time records in the month of May from 1991–2020 based on data made available by the NOAA.

State:

Month:

Illinois Cities

May weather averages for various places in Illinois, from 1991–2020.

City	Average (°F)		Record (°F)		Monthly (inches)
City	High	Low	High	Low	Precipitation	Snow
Aledo	72.2	50.1	103	26	5.1	0.0
Aurora	71.5	48.9	104	21	4.8	0.0
Belleville	78.7	56.4	97	28	5.0	0.0
Bloomington-Normal	73.9	50.8	103	21	4.7	0.0
Carbondale	76.6	55.0	101	29	5.3	0.0
Carlyle	74.7	55.8	97	31	5.4	n/a
Champaign	74.8	52.2	97	26	4.6	n/a
Charleston	76.0	54.4	101	26	4.5	0.0
Chicago	71.0	52.0	98	28	4.8	0.0
Danville	75.5	52.3	103	25	4.6	0.0
Decatur	75.0	53.5	101	25	4.9	0.0
Dixon	70.8	49.5	105	24	5.0	0.0
Du Quoin	77.1	56.4	97	29	5.5	0.0
Elgin	70.2	48.3	97	28	5.1	0.0
Elizabeth	70.4	46.1	96	21	4.2	0.0
Fairfield	77.0	54.6	98	29	5.0	0.0
Freeport	70.1	48.4	106	24	4.4	0.0
Galesburg	72.5	52.0	96	24	5.3	0.0
Geneseo	73.4	52.1	99	26	4.8	0.0
Hoopeston	74.2	52.5	101	25	4.8	0.0
Jacksonville	74.8	51.3	103	26	4.8	0.0
Joliet	71.4	49.7	95	26	4.5	0.0
Kankakee	72.7	50.4	99	27	4.6	0.0
Kewanee	71.1	49.5	96	22	5.2	0.0
Lincoln	74.8	52.0	102	24	3.9	0.0
Moline	73.5	51.0	103	25	4.7	0.0
Monmouth	74.1	51.5	102	25	5.0	0.0
Morris	71.9	51.0	103	24	4.6	0.0
Morrison	72.2	48.7	105	23	4.4	0.0
Mt. Vernon	74.1	54.4	99	29	5.0	0.0
Olney	75.8	54.1	98	29	5.6	0.0
Ottawa	73.1	50.9	106	26	4.4	0.0
Pana	75.8	53.3	101	26	4.8	0.0
Paris	73.4	52.8	99	27	4.2	0.0
Peoria	73.6	52.6	104	25	4.7	0.0
Quincy	73.3	53.9	103	26	4.5	n/a
Rantoul	74.8	51.3	99	26	4.3	0.0
Rockford	71.3	49.0	106	24	4.2	0.0
Springfield	75.3	54.0	101	28	4.5	0.0
Tuscola	74.7	53.6	98	26	4.2	0.0