Cicero, Illinois, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Cicero, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (28th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 52 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 28th Sep - 29th Sep 2025
Cicero, Illinois, United States
6 AM28th Sep 2025
7 PM
5 AM29th Sep 2025
60AQI
34AQI
44AQI
31AQI
In the last 24 hours,
Cicero's AQI reached its highest point of 60 at 6 AM during the Day, while the lowest point, 31, was recorded at 5 AM during the Night between 28th Sep and 29th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Cicero, Illinois, United States
20°C17/24°C
20°C16/25°C
21°C17/24°C
22°C17/28°C
20°C16/25°C
16°C11/22°C
17°C14/21°C
15°C9/22°C
16°C10/21°C
17°C9/23°C
19°C11/25°C
22°C15/30°C
21°C18/24°C
22°C16/31°C
25°C18/33°C
23°C19/29°C
22°C18/28°C
22°C17/29°C
22°C17/30°C
23°C17/31°C
24°C19/31°C
23°C20/29°C
24°C19/31°C
23°C18/30°C
22°C19/28°C
20°C17/23°C
19°C15/24°C
21°C14/31°C
24°C16/33°C
21°C16/29°C
--°C/°C
48AQI
44AQI
46AQI
46AQI
2025 Days Vs Air Quality
Cicero, Illinois, United States
75%
203
25%
67
0.3%
1
Total number of days with different AQI categories in last 272 days in 2025 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 272 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Cicero, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI
23AQI
26AQI
20AQI
23AQI
19AQI
21AQI
25AQI
46AQI
65AQI
42AQI
40AQI
22AQI
30AQI
39AQI
42AQI
31AQI
24AQI
21AQI
21AQI
24AQI
27AQI
32AQI
38AQI
32AQI
22AQI
22AQI
23AQI
23AQI
38AQI
37AQI
19AQI
46AQI
47AQI
20AQI
26AQI
29AQI
23AQI
33AQI
30AQI
27AQI
31AQI
41AQI
29AQI
47AQI
55AQI
28AQI
21AQI
22AQI
22AQI
23AQI
32AQI
33AQI
55AQI
43AQI
38AQI
50AQI
40AQI
23AQI
21AQI
26AQI
37AQI
34AQI
26AQI
20AQI
33AQI
27AQI
22AQI
26AQI
25AQI
23AQI
43AQI
50AQI
75AQI
23AQI
26AQI
26AQI
30AQI
18AQI
27AQI
20AQI
24AQI
20AQI
35AQI
46AQI
52AQI
46AQI
36AQI
32AQI
19AQI
21AQI
40AQI
27AQI
29AQI
24AQI
24AQI
24AQI
18AQI
33AQI
51AQI
46AQI
53AQI
42AQI
31AQI
19AQI
26AQI
36AQI
50AQI
40AQI
39AQI
20AQI
32AQI
26AQI
55AQI
25AQI
19AQI
29AQI
37AQI
34AQI
22AQI
31AQI
29AQI
17AQI
16AQI
23AQI
36AQI
41AQI
17AQI
24AQI
31AQI
24AQI
40AQI
39AQI
36AQI
50AQI
34AQI
22AQI
20AQI
18AQI
27AQI
20AQI
15AQI
24AQI
18AQI
17AQI
21AQI
26AQI
32AQI
41AQI
46AQI
39AQI
36AQI
40AQI
57AQI
56AQI
99AQI
84AQI
83AQI
79AQI
71AQI
61AQI
74AQI
81AQI
77AQI
66AQI
52AQI
56AQI
52AQI
40AQI
31AQI
42AQI
43AQI
47AQI
56AQI
45AQI
35AQI
48AQI
39AQI
24AQI
38AQI
34AQI
34AQI
54AQI
54AQI
58AQI
71AQI
53AQI
55AQI
68AQI
53AQI
47AQI
47AQI
30AQI
57AQI
72AQI
78AQI
51AQI
26AQI
30AQI
38AQI
29AQI
70AQI
80AQI
64AQI
57AQI
35AQI
36AQI
36AQI
47AQI
50AQI
50AQI
108AQI
89AQI
78AQI
84AQI
85AQI
87AQI
94AQI
70AQI
59AQI
58AQI
53AQI
48AQI
44AQI
52AQI
67AQI
74AQI
59AQI
36AQI
38AQI
30AQI
18AQI
19AQI
37AQI
35AQI
22AQI
19AQI
28AQI
36AQI
36AQI
19AQI
25AQI
37AQI
38AQI
43AQI
50AQI
44AQI
43AQI
21AQI
27AQI
33AQI
36AQI
54AQI
52AQI
53AQI
60AQI
62AQI
57AQI
57AQI
57AQI
60AQI
60AQI
61AQI
58AQI
43AQI
47AQI
22AQI
26AQI
42AQI
46AQI
52AQI
30AQI
33AQI
31AQI
32AQI
28AQI
55AQI
53AQI
50AQI
47AQI
No. of days
202540AQI
Highest AQI recorded in
June55AQI
Lowest AQI recorded in
May28AQI
202433AQI
Highest AQI recorded in
February37AQI
Lowest AQI recorded in
April26AQI
202339AQI
Highest AQI recorded in
June70AQI
Lowest AQI recorded in
October30AQI
202234AQI
Highest AQI recorded in
June38AQI
Lowest AQI recorded in
August28AQI
202135AQI
Highest AQI recorded in
February44AQI
Lowest AQI recorded in
September26AQI
202033AQI
Highest AQI recorded in
May49AQI
Lowest AQI recorded in
March23AQI
Most & Least Polluted Years Over the Last 6 Years
Cicero's annual 2025 AQI (40) shows an average percentage change of 14.6% (worsened AQI) compared to previous years: 2020 (33), 2021 (35), 2022 (34), 2023 (39), 2024 (33).