Mont Royal, Quebec, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Mont Royal, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 38 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 28th Sep - 29th Sep 2026
Mont Royal, Quebec, Canada
6 AM28th Sep 2026
7 PM
5 AM29th Sep 2026
54AQI
16AQI
33AQI
20AQI
In the last 24 hours,
Mont Royal's AQI reached its highest point of 54 at 10 AM during the Day, while the lowest point, 16, was recorded at 12 PM during the Day between 28th Sep and 29th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Mont Royal, Quebec, Canada
18°C12/26°C
18°C14/25°C
19°C14/25°C
21°C18/28°C
20°C17/24°C
17°C15/20°C
17°C12/23°C
19°C12/27°C
18°C15/24°C
17°C13/21°C
19°C12/24°C
14°C9/20°C
16°C10/22°C
19°C18/22°C
15°C12/18°C
14°C10/18°C
20°C16/24°C
18°C14/23°C
16°C11/20°C
12°C8/17°C
14°C10/19°C
13°C9/16°C
12°C8/17°C
13°C8/19°C
14°C8/21°C
17°C11/23°C
17°C13/22°C
16°C13/19°C
12°C10/16°C
14°C11/18°C
31AQI
24AQI
33AQI
26AQI
2026 Days Vs Air Quality
Mont Royal, Quebec, Canada
95%
256
5%
13
Total number of days with different AQI categories in last 272 days in 2026 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 272 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
Mont Royal, Quebec, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
16AQI (US)
26AQI (US)
16AQI (US)
46AQI (US)
38AQI (US)
58AQI (US)
61AQI (US)
70AQI (US)
42AQI (US)
15AQI (US)
18AQI (US)
20AQI (US)
48AQI (US)
38AQI (US)
30AQI (US)
12AQI (US)
36AQI (US)
34AQI (US)
42AQI (US)
20AQI (US)
22AQI (US)
49AQI (US)
54AQI (US)
48AQI (US)
46AQI (US)
48AQI (US)
44AQI (US)
46AQI (US)
51AQI (US)
49AQI (US)
45AQI (US)
48AQI (US)
49AQI (US)
50AQI (US)
54AQI (US)
49AQI (US)
40AQI (US)
38AQI (US)
45AQI (US)
46AQI (US)
46AQI (US)
46AQI (US)
43AQI (US)
51AQI (US)
49AQI (US)
41AQI (US)
44AQI (US)
44AQI (US)
43AQI (US)
40AQI (US)
42AQI (US)
35AQI (US)
35AQI (US)
40AQI (US)
44AQI (US)
42AQI (US)
36AQI (US)
35AQI (US)
38AQI (US)
41AQI (US)
53AQI (US)
47AQI (US)
45AQI (US)
42AQI (US)
38AQI (US)
40AQI (US)
39AQI (US)
40AQI (US)
34AQI (US)
44AQI (US)
42AQI (US)
40AQI (US)
37AQI (US)
36AQI (US)
37AQI (US)
34AQI (US)
32AQI (US)
32AQI (US)
36AQI (US)
36AQI (US)
35AQI (US)
41AQI (US)
36AQI (US)
34AQI (US)
29AQI (US)
30AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
25AQI (US)
32AQI (US)
34AQI (US)
27AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
26AQI (US)
31AQI (US)
28AQI (US)
30AQI (US)
33AQI (US)
28AQI (US)
33AQI (US)
33AQI (US)
33AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
23AQI (US)
28AQI (US)
31AQI (US)
33AQI (US)
28AQI (US)
25AQI (US)
23AQI (US)
26AQI (US)
27AQI (US)
24AQI (US)
20AQI (US)
30AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
27AQI (US)
33AQI (US)
32AQI (US)
28AQI (US)
28AQI (US)
24AQI (US)
46AQI (US)
53AQI (US)
57AQI (US)
57AQI (US)
54AQI (US)
49AQI (US)
44AQI (US)
44AQI (US)
51AQI (US)
48AQI (US)
45AQI (US)
28AQI (US)
26AQI (US)
18AQI (US)
20AQI (US)
20AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
27AQI (US)
25AQI (US)
20AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
26AQI (US)
29AQI (US)
30AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
34AQI (US)
33AQI (US)
34AQI (US)
40AQI (US)
38AQI (US)
35AQI (US)
47AQI (US)
42AQI (US)
39AQI (US)
42AQI (US)
28AQI (US)
26AQI (US)
29AQI (US)
39AQI (US)
40AQI (US)
37AQI (US)
50AQI (US)
38AQI (US)
33AQI (US)
47AQI (US)
42AQI (US)
45AQI (US)
32AQI (US)
38AQI (US)
37AQI (US)
44AQI (US)
38AQI (US)
39AQI (US)
27AQI (US)
29AQI (US)
35AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
29AQI (US)
33AQI (US)
28AQI (US)
24AQI (US)
28AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
25AQI (US)
30AQI (US)
28AQI (US)
25AQI (US)
24AQI (US)
25AQI (US)
22AQI (US)
25AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
25AQI (US)
30AQI (US)
28AQI (US)
29AQI (US)
34AQI (US)
38AQI (US)
43AQI (US)
30AQI (US)
32AQI (US)
26AQI (US)
29AQI (US)
28AQI (US)
33AQI (US)
24AQI (US)
31AQI (US)
26AQI (US)
25AQI (US)
25AQI (US)
28AQI (US)
34AQI (US)
26AQI (US)
27AQI (US)
23AQI (US)
38AQI (US)
38AQI (US)
43AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
24AQI (US)
34AQI (US)
30AQI (US)
29AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202533AQI (US)
Highest AQI (US) recorded in
July40AQI (US)
Lowest AQI (US) recorded in
May24AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
February41AQI (US)
Lowest AQI (US) recorded in
November25AQI (US)
202338AQI (US)
Highest AQI (US) recorded in
June55AQI (US)
Lowest AQI (US) recorded in
November28AQI (US)
202235AQI (US)
Highest AQI (US) recorded in
January47AQI (US)
Lowest AQI (US) recorded in
September24AQI (US)
202135AQI (US)
Highest AQI (US) recorded in
February42AQI (US)
Lowest AQI (US) recorded in
September24AQI (US)
202029AQI (US)
Highest AQI (US) recorded in
November36AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Mont Royal's annual 2026 AQI (US) (33) shows an average percentage change of -1.7% (improved AQI (US)) compared to previous years: 2020 (29), 2021 (35), 2022 (35), 2023 (38), 2024 (33), 2025 (33).