Saint John, New Brunswick, 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
Saint John, New Brunswick, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (31st October):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 33 of Good air quality on the same day.
Day & Night AQI Trend: 30th Sep - 1st Oct 2026
Saint John, New Brunswick, Canada
7 AM30th Sep 2026
7 PM
6 AM1st Oct 2026
52AQI
23AQI
40AQI
30AQI
In the last 24 hours,
Saint John's AQI reached its highest point of 52 at 6 PM during the Day, while the lowest point, 23, was recorded at 9 AM during the Day between 30th Sep and 1st Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Saint John, New Brunswick, Canada
16°C10/24°C
15°C12/17°C
18°C15/22°C
15°C13/17°C
12°C11/13°C
15°C9/22°C
16°C10/22°C
11°C7/14°C
17°C12/23°C
15°C11/20°C
13°C8/18°C
13°C11/16°C
16°C12/22°C
12°C7/19°C
13°C9/17°C
15°C12/19°C
15°C12/20°C
11°C7/16°C
10°C6/14°C
13°C10/17°C
10°C5/16°C
10°C5/16°C
11°C6/18°C
14°C8/20°C
15°C11/20°C
14°C12/18°C
12°C11/14°C
14°C12/15°C
13°C11/18°C
12°C10/14°C
31AQI
23AQI
31AQI
22AQI
2026 Days Vs Air Quality
Saint John, New Brunswick, Canada
97%
262
3%
8
Total number of days with different AQI categories in last 274 days in 2026 (91 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2026, 97% of 274 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
Saint John, New Brunswick, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI (US)
13AQI (US)
10AQI (US)
17AQI (US)
27AQI (US)
50AQI (US)
21AQI (US)
15AQI (US)
20AQI (US)
17AQI (US)
11AQI (US)
11AQI (US)
12AQI (US)
45AQI (US)
26AQI (US)
29AQI (US)
14AQI (US)
26AQI (US)
23AQI (US)
15AQI (US)
13AQI (US)
48AQI (US)
54AQI (US)
47AQI (US)
47AQI (US)
48AQI (US)
45AQI (US)
46AQI (US)
51AQI (US)
50AQI (US)
45AQI (US)
47AQI (US)
49AQI (US)
50AQI (US)
50AQI (US)
48AQI (US)
41AQI (US)
38AQI (US)
45AQI (US)
46AQI (US)
46AQI (US)
45AQI (US)
42AQI (US)
50AQI (US)
50AQI (US)
41AQI (US)
43AQI (US)
45AQI (US)
43AQI (US)
40AQI (US)
41AQI (US)
36AQI (US)
35AQI (US)
39AQI (US)
45AQI (US)
42AQI (US)
35AQI (US)
35AQI (US)
38AQI (US)
40AQI (US)
53AQI (US)
47AQI (US)
45AQI (US)
42AQI (US)
38AQI (US)
39AQI (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)
36AQI (US)
41AQI (US)
36AQI (US)
33AQI (US)
28AQI (US)
29AQI (US)
33AQI (US)
30AQI (US)
27AQI (US)
25AQI (US)
32AQI (US)
33AQI (US)
28AQI (US)
32AQI (US)
30AQI (US)
28AQI (US)
27AQI (US)
31AQI (US)
28AQI (US)
30AQI (US)
32AQI (US)
28AQI (US)
33AQI (US)
33AQI (US)
33AQI (US)
30AQI (US)
32AQI (US)
33AQI (US)
29AQI (US)
27AQI (US)
23AQI (US)
27AQI (US)
30AQI (US)
32AQI (US)
28AQI (US)
24AQI (US)
22AQI (US)
26AQI (US)
27AQI (US)
24AQI (US)
21AQI (US)
29AQI (US)
31AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
27AQI (US)
28AQI (US)
23AQI (US)
44AQI (US)
51AQI (US)
55AQI (US)
56AQI (US)
54AQI (US)
49AQI (US)
44AQI (US)
42AQI (US)
50AQI (US)
47AQI (US)
45AQI (US)
34AQI (US)
28AQI (US)
20AQI (US)
18AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
25AQI (US)
25AQI (US)
28AQI (US)
26AQI (US)
23AQI (US)
21AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
26AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
29AQI (US)
26AQI (US)
23AQI (US)
23AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
28AQI (US)
25AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
34AQI (US)
27AQI (US)
27AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
31AQI (US)
29AQI (US)
28AQI (US)
30AQI (US)
34AQI (US)
41AQI (US)
25AQI (US)
35AQI (US)
48AQI (US)
49AQI (US)
29AQI (US)
39AQI (US)
30AQI (US)
19AQI (US)
35AQI (US)
43AQI (US)
40AQI (US)
39AQI (US)
38AQI (US)
39AQI (US)
36AQI (US)
33AQI (US)
37AQI (US)
43AQI (US)
34AQI (US)
30AQI (US)
40AQI (US)
45AQI (US)
46AQI (US)
44AQI (US)
30AQI (US)
29AQI (US)
29AQI (US)
29AQI (US)
31AQI (US)
29AQI (US)
33AQI (US)
62AQI (US)
42AQI (US)
26AQI (US)
34AQI (US)
34AQI (US)
29AQI (US)
26AQI (US)
26AQI (US)
34AQI (US)
37AQI (US)
31AQI (US)
33AQI (US)
30AQI (US)
27AQI (US)
25AQI (US)
17AQI (US)
23AQI (US)
24AQI (US)
20AQI (US)
26AQI (US)
19AQI (US)
23AQI (US)
27AQI (US)
33AQI (US)
33AQI (US)
34AQI (US)
22AQI (US)
32AQI (US)
28AQI (US)
24AQI (US)
30AQI (US)
22AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
37AQI (US)
25AQI (US)
24AQI (US)
28AQI (US)
35AQI (US)
36AQI (US)
27AQI (US)
29AQI (US)
24AQI (US)
25AQI (US)
32AQI (US)
30AQI (US)
43AQI (US)
37AQI (US)
29AQI (US)
35AQI (US)
25AQI (US)
33AQI (US)
34AQI (US)
27AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202525AQI (US)
Highest AQI (US) recorded in
June32AQI (US)
Lowest AQI (US) recorded in
April16AQI (US)
202426AQI (US)
Highest AQI (US) recorded in
February30AQI (US)
Lowest AQI (US) recorded in
November17AQI (US)
202330AQI (US)
Highest AQI (US) recorded in
March34AQI (US)
Lowest AQI (US) recorded in
November26AQI (US)
202229AQI (US)
Highest AQI (US) recorded in
February33AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202128AQI (US)
Highest AQI (US) recorded in
March33AQI (US)
Lowest AQI (US) recorded in
October20AQI (US)
202024AQI (US)
Highest AQI (US) recorded in
March32AQI (US)
Lowest AQI (US) recorded in
September19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Saint John's annual 2026 AQI (US) (33) shows an average percentage change of 23.01% (worsened AQI (US)) compared to previous years: 2020 (24), 2021 (28), 2022 (29), 2023 (30), 2024 (26), 2025 (25).