Portage Park, Chicago, 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
Portage Park, Chicago, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (13th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 51 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Aug - 14th Aug 2025
Portage Park, Chicago, Illinois, United States
5 AM13th Aug 2025
8 PM
4 AM14th Aug 2025
64AQI
41AQI
58AQI
54AQI
In the last 24 hours,
Portage Park's AQI reached its highest point of 64 at 3 PM during the Day, while the lowest point, 41, was recorded at 5 AM during the Day between 13th Aug and 14th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Portage Park, Chicago, Illinois, United States
26°C20/32°C
28°C24/32°C
20°C19/21°C
22°C18/27°C
24°C21/27°C
22°C20/22°C
22°C18/27°C
25°C20/31°C
27°C22/35°C
29°C25/34°C
25°C22/28°C
26°C23/30°C
27°C24/33°C
28°C24/33°C
29°C23/36°C
25°C22/26°C
23°C20/26°C
23°C20/26°C
23°C16/28°C
23°C19/27°C
23°C19/27°C
24°C21/27°C
25°C21/31°C
27°C21/32°C
29°C24/35°C
30°C24/36°C
29°C26/36°C
26°C24/29°C
28°C24/35°C
25°C22/26°C
--°C/°C
60AQI
60AQI
60AQI
60AQI
2025 Days Vs Air Quality
Portage Park, Chicago, Illinois, United States
66%
93
32%
45
1%
2
Total number of days with different AQI categories in last 226 days in 2025 (139 days remaining)
Under WHO’s Safe Air Quality Limits: 66%
Health Risk Level:
Moderate
In 2025, 66% of 226 days were within WHO’s safe air quality limits, and 34% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Portage Park, Chicago, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
54AQI
47AQI
35AQI
32AQI
19AQI
21AQI
40AQI
28AQI
30AQI
25AQI
25AQI
27AQI
19AQI
38AQI
49AQI
47AQI
53AQI
47AQI
35AQI
20AQI
22AQI
38AQI
53AQI
42AQI
40AQI
21AQI
34AQI
30AQI
53AQI
26AQI
19AQI
31AQI
40AQI
34AQI
20AQI
31AQI
27AQI
16AQI
16AQI
21AQI
37AQI
41AQI
18AQI
22AQI
32AQI
23AQI
37AQI
35AQI
33AQI
46AQI
36AQI
22AQI
20AQI
18AQI
25AQI
18AQI
15AQI
19AQI
18AQI
14AQI
21AQI
26AQI
30AQI
40AQI
46AQI
40AQI
37AQI
43AQI
57AQI
57AQI
101AQI
83AQI
83AQI
78AQI
71AQI
62AQI
74AQI
80AQI
76AQI
63AQI
51AQI
56AQI
52AQI
39AQI
33AQI
44AQI
43AQI
47AQI
57AQI
43AQI
32AQI
49AQI
37AQI
23AQI
37AQI
34AQI
34AQI
55AQI
54AQI
57AQI
71AQI
52AQI
54AQI
66AQI
52AQI
44AQI
46AQI
29AQI
59AQI
72AQI
79AQI
50AQI
27AQI
29AQI
40AQI
29AQI
75AQI
81AQI
65AQI
56AQI
33AQI
39AQI
35AQI
46AQI
50AQI
49AQI
114AQI
93AQI
81AQI
88AQI
89AQI
88AQI
94AQI
70AQI
60AQI
58AQI
53AQI
48AQI
42AQI
51AQI
37AQI
34AQI
27AQI
55AQI
53AQI
70AQI
No. of days
202545AQI
Highest AQI recorded in
August70AQI
Lowest AQI recorded in
May27AQI
Most & Least Polluted Years Over the Last 1 Years
Portage Park's annual 2025 AQI (45) shows an average percentage change of NaN% (improved AQI) compared to previous years: .