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!
June Air Quality Analysis
Castle Street, Saint John, New Brunswick, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 27 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Jun - 2nd Jun 2026
Castle Street, Saint John, New Brunswick, Canada
5 AM1st Jun 2026
8 PM
4 AM2nd Jun 2026
35AQI
14AQI
34AQI
21AQI
In the last 24 hours,
Castle Street's AQI reached its highest point of 35 at 12 PM during the Day, while the lowest point, 14, was recorded at 8 PM during the Day between 1st Jun and 2nd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Castle Street, Saint John, New Brunswick, Canada
9°C4/15°C
8°C4/10°C
8°C7/9°C
9°C6/13°C
8°C4/14°C
8°C2/14°C
9°C7/10°C
9°C8/14°C
9°C5/14°C
9°C3/16°C
13°C7/21°C
14°C10/19°C
14°C6/24°C
17°C8/26°C
15°C8/22°C
10°C7/16°C
16°C9/23°C
13°C5/18°C
11°C4/20°C
10°C4/17°C
11°C4/19°C
11°C7/13°C
17°C10/27°C
14°C11/21°C
9°C7/10°C
9°C6/14°C
8°C5/13°C
7°C2/12°C
10°C3/16°C
10°C5/16°C
47AQI
28AQI
43AQI
31AQI
2026 Days Vs Air Quality
Castle Street, Saint John, New Brunswick, Canada
94%
141
6%
9
Total number of days with different AQI categories in last 153 days in 2026 (212 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 153 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)
28AQI (US)
43AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
27AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
June27AQI (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) (35) shows an average percentage change of 27.9% (worsened AQI (US)) compared to previous years: 2020 (26), 2021 (28), 2022 (29), 2023 (31), 2024 (26), 2025 (25).