St. Andrews, New Brunswick, 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
St. Andrews, New Brunswick, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 21 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Sep - 17th Sep 2025
St. Andrews, New Brunswick, Canada
5 AM16th Sep 2025
7 PM
4 AM17th Sep 2025
23AQI
20AQI
23AQI
20AQI
In the last 24 hours,
St. Andrews's AQI reached its highest point of 23 at 10 AM during the Day, while the lowest point, 20, was recorded at 9 PM during the Night between 16th Sep and 17th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
St. Andrews, New Brunswick, Canada
15°C10/19°C
15°C11/20°C
15°C12/18°C
15°C9/19°C
16°C9/22°C
16°C12/20°C
16°C14/18°C
15°C14/17°C
17°C15/22°C
17°C13/20°C
16°C12/20°C
14°C11/17°C
14°C10/18°C
16°C9/21°C
14°C11/18°C
15°C10/19°C
14°C9/18°C
14°C12/18°C
15°C12/18°C
17°C15/18°C
14°C14/14°C
16°C13/19°C
15°C10/19°C
13°C7/16°C
17°C11/22°C
15°C11/20°C
13°C11/16°C
14°C9/18°C
16°C11/21°C
16°C11/21°C
--°C/°C
23AQI
20AQI
22AQI
20AQI
2025 Days Vs Air Quality
St. Andrews, New Brunswick, Canada
94%
163
6%
11
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 260 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
St. Andrews, New Brunswick, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
18AQI
16AQI
19AQI
17AQI
16AQI
17AQI
18AQI
18AQI
14AQI
14AQI
16AQI
17AQI
15AQI
17AQI
14AQI
14AQI
9AQI
14AQI
19AQI
11AQI
22AQI
16AQI
17AQI
16AQI
12AQI
15AQI
12AQI
15AQI
17AQI
21AQI
14AQI
16AQI
23AQI
22AQI
15AQI
18AQI
23AQI
19AQI
17AQI
18AQI
15AQI
16AQI
17AQI
13AQI
15AQI
16AQI
17AQI
19AQI
24AQI
25AQI
23AQI
21AQI
13AQI
12AQI
15AQI
17AQI
14AQI
12AQI
12AQI
14AQI
20AQI
24AQI
23AQI
18AQI
17AQI
18AQI
19AQI
19AQI
28AQI
41AQI
50AQI
49AQI
46AQI
53AQI
42AQI
32AQI
56AQI
39AQI
37AQI
35AQI
32AQI
23AQI
20AQI
20AQI
23AQI
20AQI
25AQI
36AQI
47AQI
49AQI
23AQI
21AQI
22AQI
16AQI
23AQI
29AQI
29AQI
40AQI
41AQI
23AQI
33AQI
47AQI
25AQI
23AQI
27AQI
26AQI
23AQI
20AQI
19AQI
30AQI
49AQI
28AQI
17AQI
26AQI
26AQI
25AQI
16AQI
29AQI
28AQI
37AQI
55AQI
57AQI
57AQI
46AQI
52AQI
58AQI
31AQI
20AQI
47AQI
71AQI
51AQI
21AQI
27AQI
43AQI
32AQI
28AQI
40AQI
56AQI
60AQI
40AQI
23AQI
26AQI
28AQI
14AQI
15AQI
19AQI
24AQI
21AQI
26AQI
32AQI
26AQI
16AQI
16AQI
19AQI
19AQI
21AQI
19AQI
25AQI
28AQI
30AQI
24AQI
22AQI
27AQI
22AQI
20AQI
18AQI
18AQI
21AQI
19AQI
18AQI
20AQI
23AQI
21AQI
18AQI
16AQI
17AQI
32AQI
34AQI
30AQI
22AQI
No. of days
202525AQI
Highest AQI recorded in
July34AQI
Lowest AQI recorded in
April16AQI
Most & Least Polluted Years Over the Last 1 Years
St. Andrews's annual 2025 AQI (25) shows an average percentage change of NaN% (improved AQI) compared to previous years: .