St Dominique, Montreal, Quebec, 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
St Dominique, Montreal, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (12th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 28 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 12th Aug - 13th Aug 2026
St Dominique, Montreal, Quebec, Canada
5 AM12th Aug 2026
8 PM
4 AM13th Aug 2026
38AQI
18AQI
30AQI
21AQI
In the last 24 hours,
St Dominique's AQI reached its highest point of 38 at 5 AM during the Day, while the lowest point, 18, was recorded at 7 PM during the Day between 12th Aug and 13th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
St Dominique, Montreal, Quebec, Canada
24°C20/29°C
21°C16/28°C
20°C13/28°C
19°C16/22°C
19°C14/24°C
21°C14/28°C
22°C17/29°C
19°C14/23°C
18°C11/27°C
21°C14/28°C
23°C16/32°C
24°C17/32°C
25°C18/33°C
22°C18/29°C
22°C19/27°C
22°C18/27°C
23°C18/29°C
24°C19/30°C
24°C20/30°C
21°C18/26°C
22°C16/29°C
24°C17/31°C
25°C19/31°C
26°C21/32°C
24°C21/30°C
23°C19/28°C
23°C19/30°C
22°C18/28°C
21°C16/27°C
21°C16/27°C
39AQI
33AQI
38AQI
36AQI
2026 Days Vs Air Quality
St Dominique, Montreal, Quebec, Canada
94%
207
6%
14
Total number of days with different AQI categories in last 225 days in 2026 (140 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 225 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
St Dominique, Montreal, Quebec, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
15AQI (US)
20AQI (US)
14AQI (US)
26AQI (US)
36AQI (US)
61AQI (US)
58AQI (US)
61AQI (US)
42AQI (US)
16AQI (US)
17AQI (US)
16AQI (US)
45AQI (US)
38AQI (US)
30AQI (US)
13AQI (US)
35AQI (US)
33AQI (US)
33AQI (US)
18AQI (US)
23AQI (US)
50AQI (US)
54AQI (US)
49AQI (US)
46AQI (US)
48AQI (US)
45AQI (US)
47AQI (US)
52AQI (US)
50AQI (US)
46AQI (US)
48AQI (US)
50AQI (US)
51AQI (US)
54AQI (US)
51AQI (US)
42AQI (US)
39AQI (US)
46AQI (US)
46AQI (US)
46AQI (US)
47AQI (US)
44AQI (US)
52AQI (US)
50AQI (US)
42AQI (US)
44AQI (US)
46AQI (US)
43AQI (US)
41AQI (US)
42AQI (US)
36AQI (US)
35AQI (US)
40AQI (US)
44AQI (US)
42AQI (US)
36AQI (US)
35AQI (US)
39AQI (US)
42AQI (US)
53AQI (US)
46AQI (US)
45AQI (US)
42AQI (US)
38AQI (US)
40AQI (US)
40AQI (US)
41AQI (US)
35AQI (US)
44AQI (US)
42AQI (US)
40AQI (US)
37AQI (US)
36AQI (US)
37AQI (US)
35AQI (US)
33AQI (US)
32AQI (US)
37AQI (US)
36AQI (US)
37AQI (US)
41AQI (US)
36AQI (US)
33AQI (US)
30AQI (US)
30AQI (US)
35AQI (US)
31AQI (US)
28AQI (US)
25AQI (US)
33AQI (US)
34AQI (US)
28AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
27AQI (US)
31AQI (US)
27AQI (US)
31AQI (US)
33AQI (US)
28AQI (US)
34AQI (US)
34AQI (US)
34AQI (US)
30AQI (US)
33AQI (US)
32AQI (US)
30AQI (US)
28AQI (US)
24AQI (US)
28AQI (US)
31AQI (US)
34AQI (US)
29AQI (US)
25AQI (US)
23AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
21AQI (US)
30AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
27AQI (US)
34AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
25AQI (US)
45AQI (US)
52AQI (US)
56AQI (US)
57AQI (US)
55AQI (US)
49AQI (US)
44AQI (US)
43AQI (US)
50AQI (US)
48AQI (US)
46AQI (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)
19AQI (US)
26AQI (US)
24AQI (US)
27AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
22AQI (US)
23AQI (US)
20AQI (US)
22AQI (US)
22AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
29AQI (US)
30AQI (US)
27AQI (US)
29AQI (US)
33AQI (US)
31AQI (US)
33AQI (US)
33AQI (US)
34AQI (US)
41AQI (US)
37AQI (US)
38AQI (US)
49AQI (US)
39AQI (US)
38AQI (US)
40AQI (US)
28AQI (US)
30AQI (US)
29AQI (US)
37AQI (US)
39AQI (US)
37AQI (US)
48AQI (US)
38AQI (US)
32AQI (US)
46AQI (US)
40AQI (US)
41AQI (US)
33AQI (US)
39AQI (US)
37AQI (US)
41AQI (US)
36AQI (US)
35AQI (US)
28AQI (US)
30AQI (US)
35AQI (US)
28AQI (US)
37AQI (US)
44AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
24AQI (US)
34AQI (US)
35AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
February44AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202532AQI (US)
Highest AQI (US) recorded in
July40AQI (US)
Lowest AQI (US) recorded in
April24AQI (US)
202432AQI (US)
Highest AQI (US) recorded in
August41AQI (US)
Lowest AQI (US) recorded in
November23AQI (US)
202333AQI (US)
Highest AQI (US) recorded in
June49AQI (US)
Lowest AQI (US) recorded in
October24AQI (US)
202230AQI (US)
Highest AQI (US) recorded in
January41AQI (US)
Lowest AQI (US) recorded in
August16AQI (US)
202130AQI (US)
Highest AQI (US) recorded in
February35AQI (US)
Lowest AQI (US) recorded in
September22AQI (US)
202027AQI (US)
Highest AQI (US) recorded in
June34AQI (US)
Lowest AQI (US) recorded in
October22AQI (US)
Most & Least Polluted Years Over the Last 7 Years
St Dominique's annual 2026 AQI (US) (35) shows an average percentage change of 14.6% (worsened AQI (US)) compared to previous years: 2020 (27), 2021 (30), 2022 (30), 2023 (33), 2024 (32), 2025 (32).