Wilmington, 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
Wilmington, Illinois, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 27 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Oct - 13th Oct 2025
Wilmington, Illinois, United States
6 AM12th Oct 2025
6 PM
5 AM13th Oct 2025
31AQI
14AQI
32AQI
19AQI
In the last 24 hours,
Wilmington's AQI reached its highest point of 32 at 6 AM during the Night, while the lowest point, 14, was recorded at 5 PM during the Day between 12th Oct and 13th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Wilmington, Illinois, United States
24°C16/35°C
23°C15/33°C
23°C15/33°C
22°C14/32°C
21°C11/32°C
23°C12/33°C
23°C15/31°C
23°C18/31°C
23°C17/30°C
23°C18/29°C
23°C17/30°C
21°C16/25°C
19°C13/28°C
20°C9/31°C
23°C13/33°C
23°C13/33°C
24°C14/34°C
22°C14/32°C
21°C13/30°C
22°C13/32°C
24°C16/33°C
24°C16/34°C
23°C15/32°C
23°C17/30°C
17°C12/18°C
13°C8/19°C
12°C5/20°C
14°C7/22°C
16°C12/23°C
15°C6/25°C
--°C/°C
33AQI
30AQI
33AQI
30AQI
2025 Days Vs Air Quality
Wilmington, Illinois, United States
75%
150
25%
49
0.5%
1
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 286 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
Wilmington, Illinois, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI
38AQI
40AQI
32AQI
18AQI
30AQI
35AQI
25AQI
34AQI
24AQI
22AQI
25AQI
18AQI
26AQI
48AQI
46AQI
43AQI
36AQI
32AQI
19AQI
22AQI
36AQI
51AQI
44AQI
40AQI
22AQI
27AQI
24AQI
41AQI
38AQI
21AQI
25AQI
34AQI
33AQI
23AQI
27AQI
32AQI
21AQI
18AQI
31AQI
38AQI
28AQI
22AQI
23AQI
32AQI
27AQI
33AQI
30AQI
37AQI
50AQI
35AQI
22AQI
22AQI
20AQI
28AQI
25AQI
15AQI
19AQI
18AQI
19AQI
24AQI
24AQI
33AQI
41AQI
38AQI
44AQI
42AQI
37AQI
56AQI
45AQI
73AQI
68AQI
82AQI
72AQI
70AQI
59AQI
68AQI
80AQI
81AQI
70AQI
55AQI
54AQI
39AQI
27AQI
27AQI
35AQI
42AQI
46AQI
55AQI
48AQI
32AQI
39AQI
34AQI
23AQI
33AQI
27AQI
29AQI
49AQI
50AQI
52AQI
63AQI
52AQI
56AQI
69AQI
45AQI
49AQI
37AQI
28AQI
54AQI
66AQI
64AQI
44AQI
28AQI
24AQI
28AQI
27AQI
46AQI
68AQI
63AQI
55AQI
35AQI
27AQI
26AQI
28AQI
32AQI
40AQI
97AQI
106AQI
84AQI
68AQI
62AQI
69AQI
76AQI
56AQI
55AQI
55AQI
47AQI
44AQI
40AQI
45AQI
58AQI
64AQI
49AQI
35AQI
32AQI
25AQI
20AQI
18AQI
26AQI
28AQI
22AQI
19AQI
23AQI
28AQI
29AQI
25AQI
23AQI
31AQI
31AQI
34AQI
41AQI
51AQI
45AQI
25AQI
23AQI
26AQI
29AQI
38AQI
49AQI
50AQI
53AQI
55AQI
53AQI
53AQI
53AQI
54AQI
54AQI
52AQI
52AQI
36AQI
37AQI
26AQI
24AQI
27AQI
31AQI
38AQI
41AQI
44AQI
45AQI
39AQI
52AQI
56AQI
49AQI
33AQI
32AQI
43AQI
25AQI
36AQI
34AQI
27AQI
32AQI
31AQI
28AQI
51AQI
46AQI
44AQI
41AQI
39AQI
No. of days
202540AQI
Highest AQI recorded in
June51AQI
Lowest AQI recorded in
May28AQI
Most & Least Polluted Years Over the Last 1 Years
Wilmington's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .