Chemin Duncan, 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!
October Air Quality Analysis
Chemin Duncan, Mont-Royal, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (8th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 32 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Oct - 9th Oct 2025
Chemin Duncan, Mont-Royal, Quebec, Canada
6 AM8th Oct 2025
6 PM
5 AM9th Oct 2025
48AQI
14AQI
54AQI
11AQI
In the last 24 hours,
Chemin Duncan's AQI reached its highest point of 54 at 10 PM during the Night, while the lowest point, 11, was recorded at 1 AM during the Night between 8th Oct and 9th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Chemin Duncan, Mont-Royal, Quebec, Canada
--°C/°C
19°C10/27°C
17°C12/23°C
16°C9/22°C
18°C12/25°C
19°C14/24°C
19°C13/26°C
20°C13/27°C
20°C12/29°C
21°C13/30°C
15°C11/19°C
12°C6/19°C
13°C5/22°C
17°C12/24°C
18°C16/21°C
17°C14/22°C
17°C15/19°C
17°C14/23°C
15°C9/23°C
18°C14/25°C
17°C11/26°C
14°C10/19°C
11°C6/17°C
11°C4/20°C
13°C6/20°C
19°C13/27°C
21°C14/32°C
20°C14/30°C
19°C15/28°C
12°C5/16°C
6°C2/13°C
36AQI
32AQI
35AQI
32AQI
2025 Days Vs Air Quality
Chemin Duncan, Mont-Royal, Quebec, Canada
89%
175
11%
21
Total number of days with different AQI categories in last 283 days in 2025 (82 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 283 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
Chemin Duncan, Mont-Royal, Quebec, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
29AQI
20AQI
22AQI
34AQI
20AQI
20AQI
22AQI
20AQI
20AQI
18AQI
19AQI
21AQI
26AQI
35AQI
33AQI
38AQI
26AQI
33AQI
33AQI
16AQI
20AQI
34AQI
47AQI
16AQI
20AQI
25AQI
19AQI
23AQI
22AQI
26AQI
13AQI
34AQI
35AQI
20AQI
19AQI
28AQI
17AQI
34AQI
20AQI
22AQI
21AQI
17AQI
21AQI
24AQI
16AQI
28AQI
34AQI
37AQI
31AQI
41AQI
40AQI
20AQI
13AQI
14AQI
19AQI
16AQI
15AQI
15AQI
17AQI
26AQI
32AQI
32AQI
37AQI
30AQI
32AQI
14AQI
18AQI
33AQI
43AQI
44AQI
53AQI
59AQI
57AQI
60AQI
48AQI
54AQI
56AQI
31AQI
27AQI
30AQI
45AQI
43AQI
25AQI
40AQI
25AQI
30AQI
33AQI
40AQI
51AQI
45AQI
29AQI
30AQI
29AQI
32AQI
36AQI
36AQI
35AQI
45AQI
30AQI
25AQI
34AQI
38AQI
32AQI
42AQI
47AQI
48AQI
51AQI
42AQI
40AQI
39AQI
48AQI
47AQI
24AQI
35AQI
39AQI
32AQI
21AQI
26AQI
32AQI
36AQI
48AQI
57AQI
58AQI
55AQI
63AQI
49AQI
25AQI
33AQI
57AQI
79AQI
45AQI
32AQI
40AQI
50AQI
59AQI
63AQI
57AQI
55AQI
51AQI
38AQI
23AQI
33AQI
23AQI
15AQI
21AQI
20AQI
21AQI
35AQI
39AQI
32AQI
28AQI
16AQI
19AQI
27AQI
21AQI
18AQI
24AQI
37AQI
36AQI
33AQI
31AQI
31AQI
31AQI
22AQI
21AQI
28AQI
31AQI
39AQI
27AQI
37AQI
38AQI
30AQI
40AQI
40AQI
35AQI
21AQI
17AQI
24AQI
24AQI
40AQI
41AQI
20AQI
25AQI
29AQI
34AQI
47AQI
38AQI
23AQI
30AQI
43AQI
49AQI
59AQI
58AQI
48AQI
32AQI
27AQI
25AQI
25AQI
39AQI
40AQI
35AQI
32AQI
43AQI
No. of days
202533AQI
Highest AQI recorded in
October43AQI
Lowest AQI recorded in
May25AQI
Most & Least Polluted Years Over the Last 1 Years
Chemin Duncan's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .