Maisonneuve, Longueuil, 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
Maisonneuve, Longueuil, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (30th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 28 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Maisonneuve, Longueuil, Quebec, Canada
6 AM29th Sep 2026
7 PM
5 AM30th Sep 2026
48AQI
19AQI
38AQI
19AQI
In the last 24 hours,
Maisonneuve's AQI reached its highest point of 48 at 8 AM during the Day, while the lowest point, 19, was recorded at 12 AM during the Night between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Maisonneuve, Longueuil, Quebec, Canada
20°C14/29°C
20°C15/27°C
22°C19/28°C
21°C17/25°C
18°C16/22°C
17°C12/23°C
20°C12/30°C
19°C16/25°C
18°C14/22°C
20°C14/24°C
15°C10/21°C
17°C10/24°C
19°C17/22°C
15°C12/19°C
14°C9/18°C
19°C15/25°C
18°C13/24°C
16°C11/21°C
12°C7/17°C
13°C9/20°C
13°C10/16°C
12°C7/18°C
13°C7/19°C
14°C8/21°C
16°C10/23°C
17°C13/23°C
16°C13/20°C
12°C11/15°C
14°C11/19°C
15°C11/20°C
31AQI
24AQI
33AQI
24AQI
2026 Days Vs Air Quality
Maisonneuve, Longueuil, Quebec, Canada
95%
257
5%
13
Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 273 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
Maisonneuve, Longueuil, Quebec, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI (US)
31AQI (US)
18AQI (US)
41AQI (US)
43AQI (US)
59AQI (US)
57AQI (US)
65AQI (US)
44AQI (US)
16AQI (US)
17AQI (US)
18AQI (US)
48AQI (US)
41AQI (US)
35AQI (US)
16AQI (US)
39AQI (US)
34AQI (US)
45AQI (US)
21AQI (US)
27AQI (US)
48AQI (US)
53AQI (US)
48AQI (US)
47AQI (US)
47AQI (US)
45AQI (US)
46AQI (US)
51AQI (US)
50AQI (US)
45AQI (US)
48AQI (US)
48AQI (US)
50AQI (US)
53AQI (US)
49AQI (US)
40AQI (US)
39AQI (US)
44AQI (US)
45AQI (US)
46AQI (US)
47AQI (US)
46AQI (US)
54AQI (US)
50AQI (US)
42AQI (US)
43AQI (US)
45AQI (US)
42AQI (US)
41AQI (US)
42AQI (US)
38AQI (US)
35AQI (US)
40AQI (US)
44AQI (US)
42AQI (US)
35AQI (US)
34AQI (US)
38AQI (US)
42AQI (US)
52AQI (US)
45AQI (US)
44AQI (US)
41AQI (US)
38AQI (US)
39AQI (US)
38AQI (US)
39AQI (US)
34AQI (US)
41AQI (US)
41AQI (US)
39AQI (US)
37AQI (US)
36AQI (US)
36AQI (US)
35AQI (US)
33AQI (US)
32AQI (US)
36AQI (US)
36AQI (US)
36AQI (US)
40AQI (US)
36AQI (US)
34AQI (US)
30AQI (US)
31AQI (US)
35AQI (US)
31AQI (US)
27AQI (US)
25AQI (US)
32AQI (US)
35AQI (US)
28AQI (US)
31AQI (US)
29AQI (US)
27AQI (US)
27AQI (US)
31AQI (US)
28AQI (US)
31AQI (US)
33AQI (US)
30AQI (US)
32AQI (US)
34AQI (US)
33AQI (US)
29AQI (US)
34AQI (US)
35AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
30AQI (US)
32AQI (US)
34AQI (US)
29AQI (US)
25AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
25AQI (US)
21AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
33AQI (US)
31AQI (US)
30AQI (US)
30AQI (US)
25AQI (US)
46AQI (US)
52AQI (US)
57AQI (US)
57AQI (US)
53AQI (US)
48AQI (US)
44AQI (US)
44AQI (US)
50AQI (US)
47AQI (US)
45AQI (US)
29AQI (US)
26AQI (US)
18AQI (US)
19AQI (US)
20AQI (US)
25AQI (US)
26AQI (US)
23AQI (US)
21AQI (US)
24AQI (US)
27AQI (US)
25AQI (US)
20AQI (US)
25AQI (US)
24AQI (US)
27AQI (US)
25AQI (US)
25AQI (US)
20AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
21AQI (US)
23AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
26AQI (US)
29AQI (US)
29AQI (US)
26AQI (US)
27AQI (US)
30AQI (US)
30AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
34AQI (US)
37AQI (US)
37AQI (US)
33AQI (US)
42AQI (US)
43AQI (US)
41AQI (US)
40AQI (US)
28AQI (US)
24AQI (US)
30AQI (US)
41AQI (US)
40AQI (US)
40AQI (US)
51AQI (US)
39AQI (US)
34AQI (US)
48AQI (US)
42AQI (US)
44AQI (US)
31AQI (US)
37AQI (US)
38AQI (US)
40AQI (US)
40AQI (US)
41AQI (US)
27AQI (US)
28AQI (US)
34AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
30AQI (US)
32AQI (US)
27AQI (US)
24AQI (US)
29AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
31AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
28AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
25AQI (US)
21AQI (US)
24AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
35AQI (US)
43AQI (US)
29AQI (US)
28AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
31AQI (US)
23AQI (US)
30AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
27AQI (US)
33AQI (US)
27AQI (US)
26AQI (US)
23AQI (US)
36AQI (US)
28AQI (US)
39AQI (US)
44AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
24AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
No. of days
202633AQI (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
April23AQI (US)
202430AQI (US)
Highest AQI (US) recorded in
December38AQI (US)
Lowest AQI (US) recorded in
April24AQI (US)
202336AQI (US)
Highest AQI (US) recorded in
June59AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202232AQI (US)
Highest AQI (US) recorded in
January41AQI (US)
Lowest AQI (US) recorded in
August19AQI (US)
202131AQI (US)
Highest AQI (US) recorded in
August42AQI (US)
Lowest AQI (US) recorded in
September17AQI (US)
202024AQI (US)
Highest AQI (US) recorded in
November31AQI (US)
Lowest AQI (US) recorded in
October19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Maisonneuve's annual 2026 AQI (US) (33) shows an average percentage change of 8.6% (worsened AQI (US)) compared to previous years: 2020 (24), 2021 (31), 2022 (32), 2023 (36), 2024 (30), 2025 (32).