Peoria, 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
Peoria, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (22nd August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 30 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Aug - 23rd Aug 2025
Peoria, Illinois, United States
6 AM22nd Aug 2025
8 PM
5 AM23rd Aug 2025
37AQI
28AQI
39AQI
29AQI
In the last 24 hours,
Peoria's AQI reached its highest point of 39 at 4 AM during the Night, while the lowest point, 28, was recorded at 4 PM during the Day between 22nd Aug and 23rd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Peoria, Illinois, United States
28°C23/35°C
26°C23/31°C
27°C23/32°C
28°C23/34°C
29°C24/36°C
28°C17/37°C
26°C22/33°C
22°C16/27°C
19°C11/29°C
19°C11/28°C
20°C10/29°C
21°C13/29°C
24°C18/32°C
24°C15/33°C
24°C19/28°C
28°C20/36°C
28°C21/36°C
26°C22/31°C
23°C20/27°C
26°C20/33°C
24°C18/31°C
24°C14/31°C
27°C18/37°C
29°C21/39°C
29°C22/36°C
29°C22/36°C
26°C20/33°C
23°C15/31°C
21°C12/30°C
21°C11/28°C
--°C/°C
51AQI
49AQI
50AQI
49AQI
2025 Days Vs Air Quality
Peoria, Illinois, United States
70%
105
29%
43
0.6%
1
Total number of days with different AQI categories in last 235 days in 2025 (130 days remaining)
Under WHO’s Safe Air Quality Limits: 70%
Health Risk Level:
Low
In 2025, 70% of 235 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
Peoria, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
39AQI
40AQI
39AQI
28AQI
18AQI
34AQI
36AQI
26AQI
37AQI
28AQI
23AQI
32AQI
23AQI
30AQI
49AQI
47AQI
45AQI
40AQI
35AQI
24AQI
30AQI
42AQI
58AQI
50AQI
40AQI
19AQI
31AQI
25AQI
38AQI
50AQI
21AQI
21AQI
37AQI
33AQI
33AQI
26AQI
23AQI
24AQI
18AQI
22AQI
34AQI
34AQI
26AQI
25AQI
43AQI
28AQI
34AQI
30AQI
35AQI
54AQI
34AQI
28AQI
24AQI
24AQI
26AQI
17AQI
16AQI
20AQI
22AQI
20AQI
21AQI
22AQI
31AQI
41AQI
35AQI
47AQI
41AQI
49AQI
57AQI
38AQI
62AQI
65AQI
71AQI
66AQI
67AQI
58AQI
71AQI
80AQI
75AQI
69AQI
57AQI
52AQI
44AQI
33AQI
29AQI
38AQI
50AQI
53AQI
56AQI
52AQI
38AQI
51AQI
30AQI
29AQI
36AQI
29AQI
33AQI
51AQI
53AQI
54AQI
65AQI
48AQI
48AQI
65AQI
43AQI
47AQI
47AQI
32AQI
52AQI
59AQI
57AQI
43AQI
31AQI
27AQI
36AQI
31AQI
48AQI
46AQI
58AQI
55AQI
32AQI
30AQI
37AQI
34AQI
39AQI
39AQI
72AQI
110AQI
84AQI
62AQI
55AQI
58AQI
61AQI
54AQI
54AQI
57AQI
50AQI
53AQI
46AQI
49AQI
58AQI
60AQI
56AQI
52AQI
50AQI
33AQI
23AQI
20AQI
30AQI
33AQI
35AQI
29AQI
52AQI
46AQI
53AQI
No. of days
202542AQI
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
May29AQI
Most & Least Polluted Years Over the Last 1 Years
Peoria's annual 2025 AQI (42) shows an average percentage change of NaN% (improved AQI) compared to previous years: .