Average June Temperatures for Illinois

Average temperatures for June at cities throughout Illinois are listed below.

You can jump to a separate table for each region of the state: Chicago Area, Northern Illinois, Central Illinois and Southern Illinois.

The tables give the normal maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Chicago Area

Average June temperatures
High °F	Low °F	Place	High °C	Low °C
81	60	Aurora	27	16
78	57	Chicago Botanical Garden	26	14
81	63	Chicago Midway Airport	27	17
80	61	Chicago O'Hare Airport	27	16
80	58	Elgin	27	15
80	60	Joliet	27	16
79	59	Rochelle	26	15

Northern Illinois

Average temperatures in June
High °F	Low °F	Place	High °C	Low °C
78	59	Antioch	26	15
80	60	DeKalb	27	15
80	61	Dixon	27	16
79	59	Freeport	26	15
83	61	Moline	28	16
81	60	Rockford	27	15
77	56	Waukegan	25	13

Central Illinois

Normal temperatures for June
High °F	Low °F	Place	High °C	Low °C
84	66	Alton	29	19
81	60	Bloomington	27	15
86	65	Cahokia	30	18
83	62	Champaign	28	17
86	63	Charleston	30	17
83	61	Danville	28	16
82	63	Decatur	28	17
82	61	Kankakee	28	16
80	61	Ottawa	27	16
83	62	Peoria	28	17
82	63	Quincy	28	17
84	63	Springfield	29	17

Southern Illinois

Average June temperatures
High °F	Low °F	Place	High °C	Low °C
87	65	Belleville	31	18
86	66	Cairo	30	19
85	64	Carbondale	29	18
82	64	Mt Vernon	28	18

Average Temperatures for Illinois in June

Chicago Area

Northern Illinois

Central Illinois

Southern Illinois

Reference

More Illinois Weather Information