Toronto, Ontario, Canada 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
Toronto, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (1st October):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 32 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 30th Sep - 1st Oct 2026
Toronto, Ontario, Canada
6 AM30th Sep 2026
7 PM
5 AM1st Oct 2026
48AQI
33AQI
48AQI
22AQI
In the last 24 hours,
Toronto's AQI reached its highest point of 48 at 6 AM during the Night, while the lowest point, 22, was recorded at 5 AM during the Night between 30th Sep and 1st Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Toronto, Ontario, Canada
22°C19/28°C
22°C18/28°C
20°C15/26°C
19°C15/25°C
19°C15/23°C
20°C13/29°C
20°C13/27°C
21°C19/25°C
21°C16/28°C
18°C11/25°C
19°C11/27°C
21°C15/26°C
16°C11/20°C
19°C15/24°C
21°C17/25°C
18°C16/22°C
17°C14/21°C
14°C11/17°C
16°C12/21°C
12°C9/16°C
13°C8/17°C
14°C9/18°C
14°C11/18°C
16°C11/22°C
17°C12/24°C
18°C13/25°C
17°C15/22°C
18°C16/23°C
19°C15/24°C
20°C17/23°C
34AQI
29AQI
38AQI
30AQI
2026 Days Vs Air Quality
Toronto, Ontario, Canada
91%
246
9%
25
Total number of days with different AQI categories in last 274 days in 2026 (91 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2026, 91% of 274 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Toronto, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
11AQI (US)
11AQI (US)
12AQI (US)
42AQI (US)
47AQI (US)
77AQI (US)
69AQI (US)
73AQI (US)
34AQI (US)
16AQI (US)
19AQI (US)
30AQI (US)
39AQI (US)
35AQI (US)
15AQI (US)
26AQI (US)
41AQI (US)
29AQI (US)
32AQI (US)
22AQI (US)
32AQI (US)
56AQI (US)
58AQI (US)
47AQI (US)
48AQI (US)
48AQI (US)
40AQI (US)
44AQI (US)
50AQI (US)
56AQI (US)
45AQI (US)
45AQI (US)
51AQI (US)
49AQI (US)
45AQI (US)
51AQI (US)
50AQI (US)
40AQI (US)
45AQI (US)
46AQI (US)
45AQI (US)
40AQI (US)
39AQI (US)
48AQI (US)
50AQI (US)
44AQI (US)
47AQI (US)
57AQI (US)
44AQI (US)
41AQI (US)
41AQI (US)
38AQI (US)
36AQI (US)
39AQI (US)
46AQI (US)
44AQI (US)
35AQI (US)
38AQI (US)
36AQI (US)
39AQI (US)
61AQI (US)
48AQI (US)
48AQI (US)
42AQI (US)
36AQI (US)
42AQI (US)
39AQI (US)
37AQI (US)
37AQI (US)
43AQI (US)
39AQI (US)
41AQI (US)
36AQI (US)
33AQI (US)
38AQI (US)
34AQI (US)
32AQI (US)
39AQI (US)
42AQI (US)
40AQI (US)
37AQI (US)
40AQI (US)
38AQI (US)
38AQI (US)
37AQI (US)
28AQI (US)
31AQI (US)
31AQI (US)
31AQI (US)
43AQI (US)
33AQI (US)
30AQI (US)
36AQI (US)
30AQI (US)
32AQI (US)
30AQI (US)
28AQI (US)
32AQI (US)
33AQI (US)
31AQI (US)
32AQI (US)
29AQI (US)
36AQI (US)
39AQI (US)
46AQI (US)
40AQI (US)
30AQI (US)
38AQI (US)
28AQI (US)
27AQI (US)
34AQI (US)
26AQI (US)
29AQI (US)
34AQI (US)
28AQI (US)
30AQI (US)
24AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
27AQI (US)
33AQI (US)
36AQI (US)
30AQI (US)
27AQI (US)
30AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
36AQI (US)
26AQI (US)
43AQI (US)
49AQI (US)
78AQI (US)
61AQI (US)
46AQI (US)
51AQI (US)
44AQI (US)
44AQI (US)
51AQI (US)
43AQI (US)
47AQI (US)
36AQI (US)
29AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
30AQI (US)
31AQI (US)
33AQI (US)
30AQI (US)
33AQI (US)
45AQI (US)
46AQI (US)
28AQI (US)
26AQI (US)
43AQI (US)
45AQI (US)
38AQI (US)
29AQI (US)
28AQI (US)
25AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
33AQI (US)
44AQI (US)
43AQI (US)
37AQI (US)
36AQI (US)
40AQI (US)
43AQI (US)
36AQI (US)
39AQI (US)
40AQI (US)
38AQI (US)
30AQI (US)
32AQI (US)
28AQI (US)
45AQI (US)
35AQI (US)
53AQI (US)
68AQI (US)
67AQI (US)
59AQI (US)
61AQI (US)
81AQI (US)
85AQI (US)
97AQI (US)
47AQI (US)
40AQI (US)
63AQI (US)
28AQI (US)
29AQI (US)
29AQI (US)
28AQI (US)
42AQI (US)
52AQI (US)
52AQI (US)
24AQI (US)
28AQI (US)
35AQI (US)
45AQI (US)
37AQI (US)
30AQI (US)
25AQI (US)
29AQI (US)
39AQI (US)
47AQI (US)
46AQI (US)
31AQI (US)
35AQI (US)
34AQI (US)
39AQI (US)
43AQI (US)
38AQI (US)
30AQI (US)
29AQI (US)
30AQI (US)
33AQI (US)
29AQI (US)
38AQI (US)
35AQI (US)
29AQI (US)
30AQI (US)
32AQI (US)
27AQI (US)
42AQI (US)
35AQI (US)
25AQI (US)
32AQI (US)
35AQI (US)
31AQI (US)
44AQI (US)
35AQI (US)
36AQI (US)
32AQI (US)
34AQI (US)
34AQI (US)
36AQI (US)
33AQI (US)
27AQI (US)
31AQI (US)
32AQI (US)
46AQI (US)
37AQI (US)
32AQI (US)
32AQI (US)
35AQI (US)
33AQI (US)
29AQI (US)
29AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
29AQI (US)
28AQI (US)
30AQI (US)
36AQI (US)
42AQI (US)
26AQI (US)
33AQI (US)
40AQI (US)
32AQI (US)
39AQI (US)
44AQI (US)
39AQI (US)
32AQI (US)
37AQI (US)
32AQI (US)
46AQI (US)
34AQI (US)
33AQI (US)
32AQI (US)
No. of days
202637AQI (US)
Highest AQI (US) recorded in
July46AQI (US)
Lowest AQI (US) recorded in
October32AQI (US)
202536AQI (US)
Highest AQI (US) recorded in
August49AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202432AQI (US)
Highest AQI (US) recorded in
July38AQI (US)
Lowest AQI (US) recorded in
November24AQI (US)
202339AQI (US)
Highest AQI (US) recorded in
June65AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202233AQI (US)
Highest AQI (US) recorded in
November37AQI (US)
Lowest AQI (US) recorded in
August20AQI (US)
202134AQI (US)
Highest AQI (US) recorded in
July42AQI (US)
Lowest AQI (US) recorded in
October26AQI (US)
202032AQI (US)
Highest AQI (US) recorded in
June36AQI (US)
Lowest AQI (US) recorded in
October26AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Toronto's annual 2026 AQI (US) (37) shows an average percentage change of 8.3% (worsened AQI (US)) compared to previous years: 2020 (32), 2021 (34), 2022 (33), 2023 (39), 2024 (32), 2025 (36).