Hottest Cities in Illinois.

Cities in Illinois with the highest average summer temperatures, from 30-year averages at the nearest weather station.

224 cities ranked · See the national list

#	City	Population	Avg Summer High	Hot Days/yr (90°F+)
1	Belleville	41,370	89°F	53
2	O'Fallon	32,262	89°F	53
3	Swansea	14,710	89°F	53
4	Shiloh	14,572	89°F	53
5	Troy	11,647	89°F	53
6	Highland	10,262	89°F	53
7	Collinsville	24,031	88°F	46
8	East St. Louis	17,999	88°F	46
9	Cahokia Heights	17,106	88°F	46
10	Fairview Heights	16,745	88°F	46
11	Orland Park	57,916	87°F	45
12	Carbondale	22,158	87°F	38
13	Darien	21,879	87°F	45
14	Palos Hills	18,081	87°F	45
15	Lemont	17,820	87°F	45
16	Hinsdale	17,175	87°F	45
17	Charleston	17,062	87°F	34
18	Marion	16,836	87°F	38
19	Hickory Hills	14,526	87°F	45
20	Western Springs	13,446	87°F	45
21	Effingham	12,342	87°F	38
22	Herrin	12,226	87°F	38
23	Burr Ridge	11,141	87°F	45
24	Waterloo	11,129	87°F	38
25	Columbia	11,127	87°F	39
26	Granite City	26,549	86°F	29
27	Edwardsville	26,474	86°F	29
28	Alton	25,279	86°F	29
29	Godfrey	17,712	86°F	29
30	Glen Carbon	13,977	86°F	29
31	Canton	13,144	86°F	35
32	Rantoul	12,421	86°F	33
33	Centralia	11,856	86°F	33
34	Wood River	10,279	86°F	29
35	Peoria	112,169	85°F	23
36	Bloomington	78,907	85°F	26
37	Schaumburg	76,868	85°F	28
38	Normal	53,569	85°F	26
39	Hoffman Estates	51,175	85°F	28
40	Bartlett	40,501	85°F	28
41	Quincy	39,109	85°F	31
42	Streamwood	39,001	85°F	28
43	Hanover Park	36,732	85°F	28
44	Pekin	31,781	85°F	23
45	Roselle	22,752	85°F	28
46	Bloomingdale	22,457	85°F	28
47	East Peoria	22,324	85°F	23
48	Jacksonville	18,014	85°F	35
49	Streator	12,330	85°F	33
50	Taylorville	10,646	85°F	25
51	Springfield	113,330	84°F	23
52	Champaign	89,996	84°F	23
53	Moline	42,197	84°F	22
54	Urbana	39,341	84°F	23
55	Rock Island	36,151	84°F	22
56	Danville	28,595	84°F	19
57	Morton	16,595	84°F	24
58	Mattoon	16,586	84°F	23
59	Washington	15,919	84°F	24
60	Macomb	14,894	84°F	26
61	Chatham	14,639	84°F	23
62	Mount Vernon	14,090	84°F	21
63	Lincoln	13,281	84°F	24
64	Chicago	2,711,226	83°F	13
65	Naperville	150,692	83°F	17
66	Cicero	82,797	83°F	20
67	Bolingbrook	74,096	83°F	16
68	Decatur	69,815	83°F	26
69	Oak Lawn	56,861	83°F	21
70	Berwyn	55,595	83°F	20
71	Wheaton	53,557	83°F	17
72	Oak Park	53,292	83°F	20
73	Downers Grove	50,054	83°F	17
74	Plainfield	46,708	83°F	16
75	Lombard	43,619	83°F	17
76	Romeoville	41,152	83°F	16
77	Woodridge	33,941	83°F	17
78	Glendale Heights	32,808	83°F	17
79	Galesburg	29,481	83°F	16
80	Burbank	28,739	83°F	21
81	Glen Ellyn	28,390	83°F	17
82	Lockport	26,409	83°F	16
83	Homer Glen	24,529	83°F	16
84	Kankakee	23,996	83°F	21
85	Westmont	23,724	83°F	17
86	Yorkville	23,617	83°F	16
87	Lisle	23,407	83°F	17
88	Blue Island	21,741	83°F	21
89	East Moline	20,904	83°F	18
90	Crest Hill	20,628	83°F	16
91	Evergreen Park	19,420	83°F	21
92	Brookfield	19,331	83°F	20
93	Alsip	18,583	83°F	21
94	Ottawa	18,447	83°F	14
95	Bourbonnais	18,078	83°F	21
96	Bridgeview	16,849	83°F	21
97	La Grange	15,998	83°F	20
98	Bradley	15,325	83°F	21
99	Morris	14,898	83°F	20
100	Warrenville	14,718	83°F	17
101	Chicago Ridge	14,099	83°F	21
102	Midlothian	13,948	83°F	21
103	Forest Park	13,943	83°F	20
104	Channahon	13,927	83°F	21
105	La Grange Park	13,447	83°F	20
106	Minooka	12,891	83°F	21
107	Justice	12,324	83°F	21
108	Plano	12,203	83°F	16
109	Palos Heights	12,152	83°F	21
110	Pontiac	11,294	83°F	17
111	Summit	10,846	83°F	20
112	Worth	10,700	83°F	21
113	Crestwood	10,579	83°F	21
114	Riverdale	10,340	83°F	21
115	Lyons	10,339	83°F	20
116	Aurora	179,898	82°F	16
117	Joliet	150,445	82°F	15
118	Rockford	147,521	82°F	15
119	Elgin	114,934	82°F	15
120	Arlington Heights	76,005	82°F	17
121	Des Plaines	59,156	82°F	17
122	Mount Prospect	55,472	82°F	17
123	Tinley Park	54,842	82°F	16
124	Elmhurst	45,671	82°F	17
125	Buffalo Grove	42,891	82°F	17
126	Crystal Lake	40,579	82°F	22
127	Carol Stream	39,460	82°F	14
128	Park Ridge	38,667	82°F	17
129	Wheeling	38,433	82°F	17
130	Carpentersville	37,346	82°F	15
131	Oswego	36,375	82°F	16
132	Addison	35,489	82°F	17
133	Calumet City	35,100	82°F	16
134	St. Charles	32,854	82°F	14
135	Elk Grove Village	31,987	82°F	17
136	Algonquin	30,067	82°F	15
137	Niles	30,064	82°F	17
138	Lake in the Hills	28,800	82°F	22
139	Lansing	28,284	82°F	16
140	McHenry	28,074	82°F	11
141	New Lenox	28,006	82°F	15
142	Huntley	28,005	82°F	22
143	Batavia	27,151	82°F	14
144	Oak Forest	26,805	82°F	16
145	Chicago Heights	26,736	82°F	16
146	Woodstock	26,147	82°F	22
147	West Chicago	25,395	82°F	14
148	Belvidere	24,752	82°F	15
149	Melrose Park	24,549	82°F	17
150	South Elgin	24,217	82°F	15
151	Rolling Meadows	24,027	82°F	17
152	Elmwood Park	23,868	82°F	17
153	Loves Park	23,502	82°F	15
154	Maywood	23,201	82°F	17
155	Villa Park	22,345	82°F	17
156	Montgomery	21,515	82°F	16
157	Geneva	21,258	82°F	14
158	Park Forest	21,156	82°F	16
159	South Holland	20,911	82°F	16
160	Dolton	20,825	82°F	16
161	Frankfort	20,651	82°F	16
162	Harvey	20,230	82°F	16
163	Mokena	20,021	82°F	16
164	Homewood	19,294	82°F	16
165	North Aurora	18,696	82°F	16
166	Matteson	18,645	82°F	16
167	Bensenville	18,603	82°F	17
168	Shorewood	18,343	82°F	15
169	Bellwood	18,256	82°F	17
170	Franklin Park	18,197	82°F	17
171	Cary	17,923	82°F	11
172	Westchester	16,436	82°F	17
173	Country Club Hills	16,324	82°F	16
174	Prospect Heights	15,618	82°F	17
175	Norridge	15,439	82°F	17
176	Wood Dale	13,933	82°F	17
177	Hazel Crest	13,792	82°F	16
178	Richton Park	12,521	82°F	16
179	Northlake	12,513	82°F	17
180	River Forest	11,992	82°F	17
181	Kewanee	11,913	82°F	11
182	Schiller Park	11,393	82°F	17
183	Markham	11,355	82°F	16
184	Manhattan	11,026	82°F	15
185	Pingree Grove	10,914	82°F	15
186	Campton Hills	10,877	82°F	14
187	River Grove	10,451	82°F	17
188	Evanston	76,340	81°F	17
189	Skokie	66,219	81°F	17
190	Glenview	47,752	81°F	17
191	DeKalb	40,443	81°F	13
192	Northbrook	34,585	81°F	17
193	Highland Park	30,398	81°F	17
194	Wilmette	27,503	81°F	17
195	Morton Grove	24,619	81°F	17
196	Freeport	23,505	81°F	11
197	Deerfield	19,518	81°F	17
198	Lake Forest	19,416	81°F	17
199	Sycamore	18,559	81°F	13
200	Dixon	14,910	81°F	11
201	Sterling	14,717	81°F	11
202	Lincolnwood	13,112	81°F	17
203	Winnetka	12,484	81°F	17
204	Mundelein	31,915	80°F	11
205	Round Lake Beach	27,079	80°F	10
206	Vernon Hills	26,876	80°F	11
207	Grayslake	20,929	80°F	11
208	Libertyville	20,525	80°F	11
209	Lake Zurich	19,832	80°F	11
210	Round Lake	18,628	80°F	11
211	Antioch	14,859	80°F	12
212	Lindenhurst	14,417	80°F	10
213	Wauconda	14,027	80°F	11
214	Fox Lake	11,131	80°F	12
215	Gages Lake	10,819	80°F	11
216	Waukegan	89,076	79°F	11
217	Palatine	66,293	79°F	6
218	North Chicago	30,643	79°F	11
219	Gurnee	30,510	79°F	11
220	Zion	24,600	79°F	9
221	Beach Park	14,115	79°F	9
222	Barrington	11,077	79°F	6
223	Machesney Park	22,630	78°F	10
224	Roscoe	10,706	78°F	10