London, Ohio, 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
London, Ohio, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 59 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 17th Oct - 18th Oct 2025
London, Ohio, United States
7 AM17th Oct 2025
7 PM
6 AM18th Oct 2025
58AQI
39AQI
61AQI
41AQI
In the last 24 hours,
London's AQI reached its highest point of 61 at 11 PM during the Night, while the lowest point, 39, was recorded at 5 PM during the Day between 17th Oct and 18th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
London, Ohio, United States
22°C15/31°C
22°C13/32°C
21°C14/30°C
24°C16/34°C
21°C18/29°C
21°C18/27°C
20°C18/25°C
19°C16/25°C
19°C12/26°C
20°C11/30°C
22°C14/33°C
22°C14/32°C
21°C13/31°C
20°C12/30°C
18°C9/29°C
20°C12/32°C
22°C13/32°C
21°C11/31°C
21°C12/30°C
19°C17/21°C
14°C9/19°C
10°C5/16°C
11°C3/21°C
14°C8/22°C
14°C7/24°C
16°C10/25°C
15°C8/25°C
14°C8/21°C
12°C7/19°C
12°C4/23°C
--°C/°C
45AQI
41AQI
44AQI
43AQI
2025 Days Vs Air Quality
London, Ohio, United States
84%
245
16%
45
Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 291 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
London, Ohio, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI
27AQI
28AQI
24AQI
28AQI
25AQI
21AQI
33AQI
44AQI
61AQI
54AQI
47AQI
26AQI
26AQI
41AQI
44AQI
42AQI
27AQI
21AQI
22AQI
26AQI
31AQI
35AQI
39AQI
39AQI
28AQI
26AQI
25AQI
24AQI
30AQI
24AQI
21AQI
32AQI
37AQI
30AQI
24AQI
26AQI
24AQI
28AQI
30AQI
32AQI
42AQI
48AQI
32AQI
28AQI
23AQI
23AQI
22AQI
26AQI
29AQI
32AQI
37AQI
49AQI
47AQI
32AQI
32AQI
46AQI
42AQI
27AQI
31AQI
27AQI
28AQI
29AQI
27AQI
27AQI
25AQI
29AQI
28AQI
30AQI
34AQI
32AQI
33AQI
36AQI
33AQI
29AQI
26AQI
25AQI
26AQI
24AQI
22AQI
22AQI
26AQI
21AQI
22AQI
23AQI
27AQI
31AQI
42AQI
35AQI
31AQI
29AQI
29AQI
26AQI
26AQI
23AQI
22AQI
22AQI
17AQI
22AQI
20AQI
27AQI
25AQI
30AQI
29AQI
24AQI
24AQI
26AQI
29AQI
32AQI
25AQI
32AQI
25AQI
31AQI
29AQI
30AQI
28AQI
27AQI
25AQI
30AQI
24AQI
28AQI
25AQI
25AQI
23AQI
22AQI
22AQI
24AQI
26AQI
25AQI
28AQI
31AQI
28AQI
25AQI
27AQI
30AQI
39AQI
28AQI
28AQI
26AQI
25AQI
24AQI
21AQI
20AQI
18AQI
21AQI
20AQI
20AQI
19AQI
24AQI
27AQI
33AQI
28AQI
37AQI
42AQI
56AQI
55AQI
54AQI
55AQI
54AQI
53AQI
53AQI
56AQI
61AQI
63AQI
53AQI
41AQI
38AQI
32AQI
29AQI
26AQI
29AQI
37AQI
40AQI
49AQI
53AQI
53AQI
46AQI
40AQI
36AQI
35AQI
32AQI
30AQI
32AQI
40AQI
50AQI
65AQI
59AQI
53AQI
48AQI
52AQI
46AQI
47AQI
46AQI
39AQI
46AQI
53AQI
44AQI
32AQI
26AQI
26AQI
29AQI
39AQI
54AQI
52AQI
54AQI
51AQI
43AQI
31AQI
28AQI
30AQI
36AQI
46AQI
74AQI
47AQI
41AQI
44AQI
51AQI
51AQI
52AQI
50AQI
53AQI
53AQI
54AQI
47AQI
29AQI
53AQI
58AQI
59AQI
46AQI
32AQI
39AQI
28AQI
20AQI
24AQI
36AQI
32AQI
21AQI
22AQI
25AQI
31AQI
30AQI
26AQI
27AQI
30AQI
32AQI
37AQI
41AQI
54AQI
29AQI
29AQI
24AQI
29AQI
34AQI
40AQI
41AQI
45AQI
49AQI
46AQI
44AQI
52AQI
50AQI
50AQI
48AQI
46AQI
40AQI
34AQI
35AQI
31AQI
30AQI
30AQI
46AQI
59AQI
48AQI
50AQI
52AQI
68AQI
71AQI
63AQI
70AQI
19AQI
38AQI
42AQI
54AQI
62AQI
50AQI
50AQI
49AQI
50AQI
39AQI
59AQI
32AQI
32AQI
28AQI
26AQI
25AQI
45AQI
43AQI
40AQI
40AQI
52AQI
No. of days
202536AQI
Highest AQI recorded in
October52AQI
Lowest AQI recorded in
May25AQI
202428AQI
Highest AQI recorded in
July31AQI
Lowest AQI recorded in
February17AQI
202328AQI
Highest AQI recorded in
June34AQI
Lowest AQI recorded in
October21AQI
202226AQI
Highest AQI recorded in
June32AQI
Lowest AQI recorded in
November11AQI
202125AQI
Highest AQI recorded in
May27AQI
Lowest AQI recorded in
October20AQI
202024AQI
Highest AQI recorded in
June30AQI
Lowest AQI recorded in
October18AQI
Most & Least Polluted Years Over the Last 6 Years
London's annual 2025 AQI (36) shows an average percentage change of 35.9% (worsened AQI) compared to previous years: 2020 (24), 2021 (25), 2022 (26), 2023 (28), 2024 (28).