Stockton, Illinois, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Stockton, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (1st October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 53 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Oct - 2nd Oct 2025
Stockton, Illinois, United States
6 AM1st Oct 2025
7 PM
5 AM2nd Oct 2025
71AQI
31AQI
48AQI
28AQI
In the last 24 hours,
Stockton's AQI reached its highest point of 71 at 2 PM during the Day, while the lowest point, 28, was recorded at 3 AM during the Night between 1st Oct and 2nd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Stockton, Illinois, United States
17°C7/25°C
16°C10/21°C
12°C3/20°C
13°C8/19°C
11°C3/19°C
11°C2/19°C
13°C4/22°C
16°C7/24°C
17°C8/25°C
19°C10/28°C
19°C11/29°C
24°C18/31°C
22°C17/31°C
22°C16/31°C
22°C15/31°C
22°C14/30°C
22°C14/31°C
19°C15/25°C
18°C15/24°C
20°C16/27°C
21°C15/28°C
21°C16/28°C
17°C13/22°C
18°C11/27°C
21°C11/31°C
22°C12/31°C
22°C14/31°C
23°C13/32°C
23°C15/32°C
22°C15/30°C
--°C/°C
39AQI
39AQI
40AQI
40AQI
2025 Days Vs Air Quality
Stockton, Illinois, United States
75%
141
24%
46
1%
2
Total number of days with different AQI categories in last 275 days in 2025 (90 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 275 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
Stockton, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
44AQI
32AQI
22AQI
18AQI
26AQI
29AQI
21AQI
29AQI
29AQI
29AQI
29AQI
23AQI
42AQI
52AQI
51AQI
57AQI
47AQI
30AQI
20AQI
31AQI
45AQI
50AQI
30AQI
38AQI
17AQI
33AQI
33AQI
30AQI
21AQI
20AQI
28AQI
36AQI
26AQI
29AQI
25AQI
22AQI
17AQI
25AQI
22AQI
31AQI
37AQI
20AQI
29AQI
39AQI
27AQI
37AQI
37AQI
37AQI
45AQI
31AQI
17AQI
19AQI
19AQI
21AQI
16AQI
16AQI
22AQI
22AQI
23AQI
27AQI
23AQI
27AQI
30AQI
40AQI
40AQI
46AQI
50AQI
56AQI
77AQI
73AQI
73AQI
74AQI
80AQI
70AQI
66AQI
72AQI
82AQI
64AQI
58AQI
54AQI
50AQI
33AQI
26AQI
30AQI
34AQI
43AQI
46AQI
54AQI
26AQI
30AQI
34AQI
21AQI
26AQI
32AQI
23AQI
35AQI
50AQI
46AQI
46AQI
58AQI
37AQI
55AQI
56AQI
39AQI
41AQI
32AQI
34AQI
61AQI
70AQI
65AQI
43AQI
21AQI
22AQI
25AQI
25AQI
68AQI
61AQI
53AQI
36AQI
26AQI
47AQI
26AQI
27AQI
37AQI
53AQI
143AQI
115AQI
98AQI
97AQI
99AQI
70AQI
79AQI
56AQI
53AQI
53AQI
43AQI
34AQI
34AQI
55AQI
55AQI
59AQI
48AQI
31AQI
22AQI
20AQI
22AQI
21AQI
28AQI
28AQI
22AQI
19AQI
25AQI
31AQI
31AQI
32AQI
31AQI
35AQI
40AQI
40AQI
49AQI
59AQI
41AQI
23AQI
29AQI
36AQI
33AQI
43AQI
51AQI
54AQI
56AQI
59AQI
54AQI
53AQI
50AQI
49AQI
47AQI
37AQI
31AQI
33AQI
27AQI
26AQI
28AQI
40AQI
41AQI
38AQI
35AQI
42AQI
53AQI
30AQI
33AQI
27AQI
50AQI
46AQI
47AQI
41AQI
53AQI
No. of days
202541AQI
Highest AQI recorded in
October53AQI
Lowest AQI recorded in
May27AQI
Most & Least Polluted Years Over the Last 1 Years
Stockton's annual 2025 AQI (41) shows an average percentage change of NaN% (improved AQI) compared to previous years: .