Cary, Illinois, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Cary, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (2nd August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 47 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 2nd Aug - 3rd Aug 2026
Cary, Illinois, United States
5 AM2nd Aug 2026
8 PM
4 AM3rd Aug 2026
51AQI
44AQI
48AQI
21AQI
In the last 24 hours,
Cary's AQI reached its highest point of 51 at 3 PM during the Day, while the lowest point, 21, was recorded at 3 AM during the Night between 2nd Aug and 3rd Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Cary, Illinois, United States
21°C18/28°C
23°C18/29°C
24°C17/32°C
25°C19/33°C
26°C22/31°C
24°C19/31°C
23°C17/30°C
25°C17/33°C
27°C19/35°C
29°C21/37°C
29°C22/37°C
27°C21/34°C
28°C22/36°C
27°C22/34°C
23°C17/29°C
22°C14/30°C
25°C19/32°C
19°C13/25°C
19°C12/25°C
21°C15/28°C
21°C16/28°C
27°C22/34°C
27°C23/35°C
23°C19/29°C
22°C15/30°C
24°C15/33°C
23°C18/30°C
20°C19/23°C
21°C19/27°C
22°C15/30°C
65AQI
46AQI
62AQI
48AQI
2026 Days Vs Air Quality
Cary, Illinois, United States
92%
194
6%
13
1%
3
0.4%
1
Total number of days with different AQI categories in last 215 days in 2026 (150 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2026, 92% of 215 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Cary, Illinois, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
14AQI (US)
22AQI (US)
21AQI (US)
25AQI (US)
44AQI (US)
71AQI (US)
41AQI (US)
43AQI (US)
18AQI (US)
31AQI (US)
19AQI (US)
19AQI (US)
20AQI (US)
12AQI (US)
11AQI (US)
18AQI (US)
14AQI (US)
15AQI (US)
16AQI (US)
21AQI (US)
30AQI (US)
43AQI (US)
43AQI (US)
36AQI (US)
49AQI (US)
43AQI (US)
26AQI (US)
28AQI (US)
38AQI (US)
54AQI (US)
41AQI (US)
44AQI (US)
40AQI (US)
41AQI (US)
36AQI (US)
48AQI (US)
40AQI (US)
37AQI (US)
43AQI (US)
45AQI (US)
38AQI (US)
34AQI (US)
29AQI (US)
36AQI (US)
42AQI (US)
44AQI (US)
40AQI (US)
40AQI (US)
40AQI (US)
32AQI (US)
35AQI (US)
34AQI (US)
37AQI (US)
37AQI (US)
36AQI (US)
30AQI (US)
29AQI (US)
28AQI (US)
33AQI (US)
38AQI (US)
54AQI (US)
32AQI (US)
38AQI (US)
37AQI (US)
28AQI (US)
36AQI (US)
40AQI (US)
32AQI (US)
31AQI (US)
42AQI (US)
38AQI (US)
37AQI (US)
36AQI (US)
27AQI (US)
37AQI (US)
34AQI (US)
28AQI (US)
37AQI (US)
38AQI (US)
34AQI (US)
33AQI (US)
39AQI (US)
28AQI (US)
27AQI (US)
32AQI (US)
29AQI (US)
29AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
30AQI (US)
23AQI (US)
28AQI (US)
30AQI (US)
29AQI (US)
31AQI (US)
27AQI (US)
29AQI (US)
21AQI (US)
32AQI (US)
28AQI (US)
24AQI (US)
23AQI (US)
26AQI (US)
28AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
28AQI (US)
18AQI (US)
22AQI (US)
21AQI (US)
26AQI (US)
34AQI (US)
18AQI (US)
25AQI (US)
24AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
19AQI (US)
33AQI (US)
36AQI (US)
28AQI (US)
23AQI (US)
28AQI (US)
30AQI (US)
27AQI (US)
23AQI (US)
26AQI (US)
23AQI (US)
34AQI (US)
46AQI (US)
44AQI (US)
54AQI (US)
51AQI (US)
50AQI (US)
42AQI (US)
40AQI (US)
38AQI (US)
40AQI (US)
40AQI (US)
25AQI (US)
17AQI (US)
16AQI (US)
20AQI (US)
20AQI (US)
24AQI (US)
29AQI (US)
15AQI (US)
21AQI (US)
27AQI (US)
25AQI (US)
15AQI (US)
23AQI (US)
23AQI (US)
16AQI (US)
20AQI (US)
16AQI (US)
16AQI (US)
14AQI (US)
17AQI (US)
16AQI (US)
17AQI (US)
14AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
21AQI (US)
22AQI (US)
18AQI (US)
15AQI (US)
14AQI (US)
22AQI (US)
26AQI (US)
23AQI (US)
28AQI (US)
55AQI (US)
72AQI (US)
26AQI (US)
17AQI (US)
28AQI (US)
48AQI (US)
39AQI (US)
36AQI (US)
38AQI (US)
25AQI (US)
25AQI (US)
38AQI (US)
40AQI (US)
42AQI (US)
32AQI (US)
51AQI (US)
104AQI (US)
188AQI (US)
64AQI (US)
138AQI (US)
132AQI (US)
52AQI (US)
36AQI (US)
40AQI (US)
46AQI (US)
52AQI (US)
53AQI (US)
51AQI (US)
46AQI (US)
33AQI (US)
40AQI (US)
45AQI (US)
42AQI (US)
47AQI (US)
30AQI (US)
37AQI (US)
34AQI (US)
26AQI (US)
32AQI (US)
21AQI (US)
54AQI (US)
45AQI (US)
No. of days
202634AQI (US)
Highest AQI (US) recorded in
July54AQI (US)
Lowest AQI (US) recorded in
June21AQI (US)
202537AQI (US)
Highest AQI (US) recorded in
June51AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202434AQI (US)
Highest AQI (US) recorded in
July42AQI (US)
Lowest AQI (US) recorded in
January28AQI (US)
202342AQI (US)
Highest AQI (US) recorded in
June76AQI (US)
Lowest AQI (US) recorded in
December30AQI (US)
202239AQI (US)
Highest AQI (US) recorded in
June42AQI (US)
Lowest AQI (US) recorded in
May32AQI (US)
202139AQI (US)
Highest AQI (US) recorded in
August49AQI (US)
Lowest AQI (US) recorded in
May34AQI (US)
202040AQI (US)
Highest AQI (US) recorded in
June44AQI (US)
Lowest AQI (US) recorded in
October33AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Cary's annual 2026 AQI (US) (34) shows an average percentage change of -11.2% (improved AQI (US)) compared to previous years: 2020 (40), 2021 (39), 2022 (39), 2023 (42), 2024 (34), 2025 (37).