London, Ontario, Canada 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
London, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (15th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 32 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
London, Ontario, Canada
6 AM14th Aug 2026
8 PM
5 AM15th Aug 2026
48AQI
26AQI
36AQI
28AQI
In the last 24 hours,
London's AQI reached its highest point of 48 at 4 PM during the Day, while the lowest point, 26, was recorded at 9 AM during the Day between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
London, Ontario, Canada
23°C14/33°C
24°C18/32°C
19°C14/26°C
19°C11/26°C
22°C19/27°C
18°C14/24°C
18°C10/26°C
20°C11/30°C
22°C16/28°C
22°C15/29°C
23°C19/31°C
21°C17/28°C
22°C15/29°C
21°C13/29°C
23°C13/35°C
25°C18/33°C
20°C18/21°C
19°C14/24°C
19°C9/30°C
21°C10/32°C
22°C17/28°C
23°C20/28°C
23°C20/28°C
23°C15/31°C
24°C20/30°C
24°C19/32°C
20°C16/25°C
22°C17/29°C
22°C15/31°C
22°C14/31°C
55AQI
43AQI
54AQI
43AQI
2026 Days Vs Air Quality
London, Ontario, Canada
79%
176
19%
43
1%
3
0.8%
2
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2026, 79% of 227 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, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
8AQI (US)
10AQI (US)
20AQI (US)
20AQI (US)
62AQI (US)
89AQI (US)
56AQI (US)
56AQI (US)
20AQI (US)
19AQI (US)
16AQI (US)
24AQI (US)
36AQI (US)
26AQI (US)
12AQI (US)
22AQI (US)
37AQI (US)
25AQI (US)
30AQI (US)
20AQI (US)
26AQI (US)
52AQI (US)
60AQI (US)
48AQI (US)
50AQI (US)
48AQI (US)
44AQI (US)
41AQI (US)
49AQI (US)
59AQI (US)
42AQI (US)
45AQI (US)
74AQI (US)
73AQI (US)
44AQI (US)
54AQI (US)
75AQI (US)
39AQI (US)
42AQI (US)
46AQI (US)
48AQI (US)
40AQI (US)
38AQI (US)
52AQI (US)
84AQI (US)
80AQI (US)
100AQI (US)
114AQI (US)
60AQI (US)
46AQI (US)
50AQI (US)
41AQI (US)
34AQI (US)
40AQI (US)
43AQI (US)
58AQI (US)
32AQI (US)
71AQI (US)
38AQI (US)
37AQI (US)
52AQI (US)
58AQI (US)
95AQI (US)
76AQI (US)
58AQI (US)
78AQI (US)
35AQI (US)
34AQI (US)
58AQI (US)
44AQI (US)
38AQI (US)
42AQI (US)
36AQI (US)
32AQI (US)
38AQI (US)
34AQI (US)
36AQI (US)
64AQI (US)
79AQI (US)
41AQI (US)
59AQI (US)
39AQI (US)
35AQI (US)
45AQI (US)
60AQI (US)
29AQI (US)
30AQI (US)
35AQI (US)
42AQI (US)
65AQI (US)
30AQI (US)
30AQI (US)
39AQI (US)
28AQI (US)
30AQI (US)
27AQI (US)
27AQI (US)
36AQI (US)
48AQI (US)
33AQI (US)
30AQI (US)
47AQI (US)
46AQI (US)
48AQI (US)
41AQI (US)
50AQI (US)
40AQI (US)
32AQI (US)
28AQI (US)
32AQI (US)
36AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
30AQI (US)
32AQI (US)
40AQI (US)
38AQI (US)
27AQI (US)
34AQI (US)
30AQI (US)
26AQI (US)
27AQI (US)
42AQI (US)
22AQI (US)
40AQI (US)
56AQI (US)
66AQI (US)
62AQI (US)
44AQI (US)
50AQI (US)
44AQI (US)
44AQI (US)
50AQI (US)
40AQI (US)
44AQI (US)
32AQI (US)
30AQI (US)
27AQI (US)
26AQI (US)
28AQI (US)
31AQI (US)
31AQI (US)
32AQI (US)
30AQI (US)
30AQI (US)
42AQI (US)
45AQI (US)
36AQI (US)
30AQI (US)
48AQI (US)
44AQI (US)
37AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
28AQI (US)
31AQI (US)
31AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
38AQI (US)
34AQI (US)
38AQI (US)
36AQI (US)
32AQI (US)
47AQI (US)
51AQI (US)
48AQI (US)
34AQI (US)
27AQI (US)
42AQI (US)
43AQI (US)
34AQI (US)
31AQI (US)
43AQI (US)
34AQI (US)
57AQI (US)
60AQI (US)
56AQI (US)
52AQI (US)
150AQI (US)
230AQI (US)
233AQI (US)
116AQI (US)
76AQI (US)
72AQI (US)
68AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
32AQI (US)
42AQI (US)
52AQI (US)
54AQI (US)
27AQI (US)
34AQI (US)
36AQI (US)
50AQI (US)
35AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
41AQI (US)
37AQI (US)
41AQI (US)
33AQI (US)
38AQI (US)
34AQI (US)
39AQI (US)
38AQI (US)
36AQI (US)
32AQI (US)
36AQI (US)
56AQI (US)
49AQI (US)
34AQI (US)
37AQI (US)
32AQI (US)
62AQI (US)
37AQI (US)
No. of days
202643AQI (US)
Highest AQI (US) recorded in
July62AQI (US)
Lowest AQI (US) recorded in
June32AQI (US)
202536AQI (US)
Highest AQI (US) recorded in
August50AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
January39AQI (US)
Lowest AQI (US) recorded in
November26AQI (US)
202343AQI (US)
Highest AQI (US) recorded in
June74AQI (US)
Lowest AQI (US) recorded in
October33AQI (US)
202234AQI (US)
Highest AQI (US) recorded in
December38AQI (US)
Lowest AQI (US) recorded in
August20AQI (US)
202135AQI (US)
Highest AQI (US) recorded in
February40AQI (US)
Lowest AQI (US) recorded in
September28AQI (US)
202032AQI (US)
Highest AQI (US) recorded in
June37AQI (US)
Lowest AQI (US) recorded in
October24AQI (US)
Most & Least Polluted Years Over the Last 7 Years
London's annual 2026 AQI (US) (43) shows an average percentage change of 22.2% (worsened AQI (US)) compared to previous years: 2020 (32), 2021 (35), 2022 (34), 2023 (43), 2024 (33), 2025 (36).