Castle Street, 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!
August Air Quality Analysis
Castle Street, Saint John, New Brunswick, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (13th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 31 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 13th Aug - 14th Aug 2026
Castle Street, Saint John, New Brunswick, Canada
6 AM13th Aug 2026
8 PM
5 AM14th Aug 2026
38AQI
21AQI
60AQI
25AQI
In the last 24 hours,
Castle Street's AQI reached its highest point of 60 at 1 AM during the Night, while the lowest point, 21, was recorded at 9 AM during the Day between 13th Aug and 14th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Castle Street, Saint John, New Brunswick, Canada
21°C14/29°C
18°C11/26°C
16°C11/23°C
18°C14/23°C
18°C13/25°C
17°C11/24°C
17°C15/19°C
17°C14/21°C
15°C11/22°C
14°C10/21°C
17°C11/24°C
19°C12/28°C
17°C12/23°C
18°C13/25°C
18°C17/20°C
19°C17/23°C
18°C15/22°C
15°C13/17°C
18°C16/21°C
21°C16/28°C
19°C15/26°C
17°C13/23°C
19°C13/27°C
17°C15/19°C
17°C15/21°C
19°C14/26°C
16°C14/18°C
20°C14/27°C
17°C12/25°C
19°C13/27°C
40AQI
35AQI
38AQI
34AQI
2026 Days Vs Air Quality
Castle Street, Saint John, New Brunswick, Canada
95%
212
5%
10
Total number of days with different AQI categories in last 226 days in 2026 (139 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 226 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
Castle Street, Saint John, New Brunswick, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI (US)
10AQI (US)
8AQI (US)
12AQI (US)
20AQI (US)
45AQI (US)
21AQI (US)
15AQI (US)
20AQI (US)
17AQI (US)
10AQI (US)
11AQI (US)
12AQI (US)
42AQI (US)
24AQI (US)
29AQI (US)
14AQI (US)
24AQI (US)
21AQI (US)
14AQI (US)
14AQI (US)
47AQI (US)
54AQI (US)
47AQI (US)
48AQI (US)
48AQI (US)
44AQI (US)
46AQI (US)
52AQI (US)
49AQI (US)
45AQI (US)
46AQI (US)
49AQI (US)
50AQI (US)
50AQI (US)
48AQI (US)
41AQI (US)
38AQI (US)
46AQI (US)
46AQI (US)
46AQI (US)
48AQI (US)
43AQI (US)
51AQI (US)
50AQI (US)
43AQI (US)
43AQI (US)
45AQI (US)
44AQI (US)
41AQI (US)
42AQI (US)
36AQI (US)
34AQI (US)
40AQI (US)
44AQI (US)
43AQI (US)
36AQI (US)
35AQI (US)
38AQI (US)
42AQI (US)
52AQI (US)
46AQI (US)
45AQI (US)
43AQI (US)
39AQI (US)
40AQI (US)
39AQI (US)
41AQI (US)
35AQI (US)
44AQI (US)
43AQI (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)
29AQI (US)
30AQI (US)
34AQI (US)
31AQI (US)
28AQI (US)
25AQI (US)
32AQI (US)
33AQI (US)
28AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
27AQI (US)
31AQI (US)
28AQI (US)
30AQI (US)
33AQI (US)
28AQI (US)
34AQI (US)
33AQI (US)
34AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
23AQI (US)
27AQI (US)
31AQI (US)
32AQI (US)
29AQI (US)
25AQI (US)
22AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
20AQI (US)
29AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
28AQI (US)
33AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
24AQI (US)
44AQI (US)
52AQI (US)
55AQI (US)
57AQI (US)
53AQI (US)
49AQI (US)
46AQI (US)
42AQI (US)
51AQI (US)
48AQI (US)
45AQI (US)
36AQI (US)
28AQI (US)
20AQI (US)
18AQI (US)
25AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
25AQI (US)
25AQI (US)
27AQI (US)
25AQI (US)
22AQI (US)
22AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
24AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
25AQI (US)
27AQI (US)
28AQI (US)
28AQI (US)
25AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
33AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
30AQI (US)
35AQI (US)
42AQI (US)
26AQI (US)
35AQI (US)
51AQI (US)
50AQI (US)
29AQI (US)
40AQI (US)
29AQI (US)
19AQI (US)
35AQI (US)
44AQI (US)
40AQI (US)
41AQI (US)
38AQI (US)
38AQI (US)
36AQI (US)
33AQI (US)
37AQI (US)
44AQI (US)
34AQI (US)
30AQI (US)
40AQI (US)
44AQI (US)
47AQI (US)
44AQI (US)
31AQI (US)
29AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
28AQI (US)
43AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
25AQI (US)
33AQI (US)
36AQI (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
April15AQI (US)
202426AQI (US)
Highest AQI (US) recorded in
July31AQI (US)
Lowest AQI (US) recorded in
November16AQI (US)
202331AQI (US)
Highest AQI (US) recorded in
April35AQI (US)
Lowest AQI (US) recorded in
November27AQI (US)
202229AQI (US)
Highest AQI (US) recorded in
February35AQI (US)
Lowest AQI (US) recorded in
September25AQI (US)
202128AQI (US)
Highest AQI (US) recorded in
June33AQI (US)
Lowest AQI (US) recorded in
October22AQI (US)
202026AQI (US)
Highest AQI (US) recorded in
March32AQI (US)
Lowest AQI (US) recorded in
September21AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Castle Street's annual 2026 AQI (US) (33) shows an average percentage change of 20.6% (worsened AQI (US)) compared to previous years: 2020 (26), 2021 (28), 2022 (29), 2023 (31), 2024 (26), 2025 (25).