Quebec City, 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
Quebec City, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 34 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 2nd Oct - 3rd Oct 2026
Quebec City, Quebec, Canada
6 AM2nd Oct 2026
6 PM
5 AM3rd Oct 2026
44AQI
24AQI
81AQI
20AQI
In the last 24 hours,
Quebec City's AQI reached its highest point of 81 at 11 PM during the Night, while the lowest point, 20, was recorded at 5 AM during the Night between 2nd Oct and 3rd Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Quebec City, Quebec, Canada
17°C15/19°C
15°C14/18°C
15°C9/22°C
17°C9/26°C
16°C11/21°C
14°C8/21°C
17°C11/22°C
13°C8/18°C
14°C6/22°C
16°C14/19°C
13°C9/15°C
12°C6/17°C
17°C13/22°C
15°C11/20°C
13°C8/17°C
10°C6/17°C
11°C7/16°C
11°C7/16°C
10°C5/15°C
11°C6/17°C
13°C7/21°C
14°C9/21°C
15°C11/20°C
14°C13/17°C
11°C9/12°C
12°C10/15°C
13°C9/18°C
16°C10/25°C
16°C10/18°C
10°C6/15°C
33AQI
26AQI
34AQI
26AQI
2026 Days Vs Air Quality
Quebec City, Quebec, Canada
89%
242
11%
30
Total number of days with different AQI categories in last 276 days in 2026 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2026, 89% of 276 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
Quebec City, Quebec, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI (US)
22AQI (US)
22AQI (US)
32AQI (US)
37AQI (US)
57AQI (US)
45AQI (US)
58AQI (US)
48AQI (US)
22AQI (US)
18AQI (US)
21AQI (US)
54AQI (US)
43AQI (US)
44AQI (US)
16AQI (US)
37AQI (US)
43AQI (US)
66AQI (US)
26AQI (US)
37AQI (US)
50AQI (US)
54AQI (US)
49AQI (US)
48AQI (US)
48AQI (US)
44AQI (US)
46AQI (US)
51AQI (US)
47AQI (US)
44AQI (US)
48AQI (US)
50AQI (US)
52AQI (US)
55AQI (US)
51AQI (US)
40AQI (US)
38AQI (US)
46AQI (US)
46AQI (US)
47AQI (US)
46AQI (US)
45AQI (US)
52AQI (US)
49AQI (US)
40AQI (US)
44AQI (US)
45AQI (US)
41AQI (US)
40AQI (US)
43AQI (US)
36AQI (US)
35AQI (US)
39AQI (US)
42AQI (US)
41AQI (US)
34AQI (US)
33AQI (US)
36AQI (US)
39AQI (US)
52AQI (US)
46AQI (US)
45AQI (US)
43AQI (US)
38AQI (US)
40AQI (US)
40AQI (US)
41AQI (US)
34AQI (US)
40AQI (US)
42AQI (US)
39AQI (US)
36AQI (US)
35AQI (US)
36AQI (US)
35AQI (US)
32AQI (US)
32AQI (US)
37AQI (US)
37AQI (US)
36AQI (US)
41AQI (US)
36AQI (US)
34AQI (US)
31AQI (US)
31AQI (US)
35AQI (US)
31AQI (US)
28AQI (US)
24AQI (US)
32AQI (US)
34AQI (US)
28AQI (US)
30AQI (US)
29AQI (US)
27AQI (US)
27AQI (US)
30AQI (US)
27AQI (US)
30AQI (US)
33AQI (US)
29AQI (US)
34AQI (US)
34AQI (US)
33AQI (US)
30AQI (US)
34AQI (US)
33AQI (US)
31AQI (US)
28AQI (US)
24AQI (US)
28AQI (US)
32AQI (US)
34AQI (US)
29AQI (US)
25AQI (US)
23AQI (US)
26AQI (US)
27AQI (US)
25AQI (US)
21AQI (US)
28AQI (US)
33AQI (US)
31AQI (US)
28AQI (US)
28AQI (US)
34AQI (US)
32AQI (US)
29AQI (US)
29AQI (US)
25AQI (US)
44AQI (US)
52AQI (US)
56AQI (US)
58AQI (US)
55AQI (US)
49AQI (US)
44AQI (US)
44AQI (US)
51AQI (US)
48AQI (US)
45AQI (US)
30AQI (US)
28AQI (US)
21AQI (US)
21AQI (US)
25AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
25AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
22AQI (US)
22AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
40AQI (US)
62AQI (US)
53AQI (US)
42AQI (US)
38AQI (US)
29AQI (US)
30AQI (US)
31AQI (US)
32AQI (US)
39AQI (US)
32AQI (US)
34AQI (US)
28AQI (US)
29AQI (US)
44AQI (US)
52AQI (US)
44AQI (US)
38AQI (US)
32AQI (US)
51AQI (US)
42AQI (US)
40AQI (US)
54AQI (US)
36AQI (US)
26AQI (US)
42AQI (US)
55AQI (US)
59AQI (US)
59AQI (US)
54AQI (US)
48AQI (US)
45AQI (US)
48AQI (US)
44AQI (US)
52AQI (US)
41AQI (US)
38AQI (US)
47AQI (US)
52AQI (US)
56AQI (US)
52AQI (US)
37AQI (US)
30AQI (US)
34AQI (US)
25AQI (US)
30AQI (US)
29AQI (US)
42AQI (US)
58AQI (US)
28AQI (US)
26AQI (US)
34AQI (US)
37AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
35AQI (US)
24AQI (US)
26AQI (US)
32AQI (US)
29AQI (US)
22AQI (US)
24AQI (US)
22AQI (US)
28AQI (US)
26AQI (US)
25AQI (US)
26AQI (US)
22AQI (US)
25AQI (US)
31AQI (US)
24AQI (US)
34AQI (US)
33AQI (US)
41AQI (US)
44AQI (US)
37AQI (US)
26AQI (US)
24AQI (US)
27AQI (US)
29AQI (US)
30AQI (US)
26AQI (US)
32AQI (US)
28AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
36AQI (US)
29AQI (US)
30AQI (US)
23AQI (US)
36AQI (US)
40AQI (US)
38AQI (US)
34AQI (US)
41AQI (US)
43AQI (US)
37AQI (US)
30AQI (US)
36AQI (US)
27AQI (US)
41AQI (US)
35AQI (US)
30AQI (US)
36AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
June27AQI (US)
202532AQI (US)
Highest AQI (US) recorded in
October42AQI (US)
Lowest AQI (US) recorded in
April19AQI (US)
202429AQI (US)
Highest AQI (US) recorded in
August41AQI (US)
Lowest AQI (US) recorded in
November19AQI (US)
202339AQI (US)
Highest AQI (US) recorded in
June62AQI (US)
Lowest AQI (US) recorded in
November29AQI (US)
202230AQI (US)
Highest AQI (US) recorded in
January39AQI (US)
Lowest AQI (US) recorded in
August21AQI (US)
202132AQI (US)
Highest AQI (US) recorded in
August44AQI (US)
Lowest AQI (US) recorded in
September21AQI (US)
202029AQI (US)
Highest AQI (US) recorded in
November35AQI (US)
Lowest AQI (US) recorded in
September22AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Quebec City's annual 2026 AQI (US) (36) shows an average percentage change of 14.2% (worsened AQI (US)) compared to previous years: 2020 (29), 2021 (32), 2022 (30), 2023 (39), 2024 (29), 2025 (32).