Halifax, Nova Scotia, 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
Halifax, Nova Scotia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (27th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 31 of Good air quality, showing improvement over 2023 on the same day.
Day & Night AQI Trend: 27th Sep - 28th Sep 2026
Halifax, Nova Scotia, Canada
6 AM27th Sep 2026
7 PM
5 AM28th Sep 2026
50AQI
17AQI
44AQI
18AQI
In the last 24 hours,
Halifax's AQI reached its highest point of 50 at 1 PM during the Day, while the lowest point, 17, was recorded at 4 PM during the Day between 27th Sep and 28th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Halifax, Nova Scotia, Canada
20°C13/28°C
19°C14/25°C
18°C13/25°C
17°C12/21°C
18°C15/21°C
19°C18/24°C
16°C15/19°C
14°C13/16°C
14°C12/16°C
14°C11/19°C
12°C8/17°C
17°C11/23°C
16°C12/21°C
14°C9/20°C
15°C8/20°C
19°C14/25°C
14°C9/21°C
15°C9/23°C
16°C11/23°C
15°C12/18°C
11°C6/16°C
9°C4/13°C
13°C8/16°C
10°C6/17°C
9°C4/17°C
10°C4/19°C
13°C7/21°C
13°C11/14°C
13°C11/19°C
13°C11/14°C
31AQI
23AQI
34AQI
27AQI
2026 Days Vs Air Quality
Halifax, Nova Scotia, Canada
96%
255
4%
12
Total number of days with different AQI categories in last 271 days in 2026 (94 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 271 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
Halifax, Nova Scotia, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI (US)
12AQI (US)
11AQI (US)
14AQI (US)
20AQI (US)
37AQI (US)
15AQI (US)
13AQI (US)
17AQI (US)
17AQI (US)
13AQI (US)
11AQI (US)
16AQI (US)
27AQI (US)
16AQI (US)
16AQI (US)
16AQI (US)
27AQI (US)
17AQI (US)
17AQI (US)
11AQI (US)
48AQI (US)
56AQI (US)
47AQI (US)
47AQI (US)
48AQI (US)
45AQI (US)
48AQI (US)
52AQI (US)
52AQI (US)
47AQI (US)
47AQI (US)
51AQI (US)
48AQI (US)
50AQI (US)
49AQI (US)
42AQI (US)
39AQI (US)
47AQI (US)
48AQI (US)
46AQI (US)
45AQI (US)
43AQI (US)
51AQI (US)
51AQI (US)
42AQI (US)
45AQI (US)
45AQI (US)
44AQI (US)
40AQI (US)
42AQI (US)
37AQI (US)
34AQI (US)
41AQI (US)
45AQI (US)
45AQI (US)
38AQI (US)
37AQI (US)
39AQI (US)
41AQI (US)
57AQI (US)
48AQI (US)
46AQI (US)
43AQI (US)
39AQI (US)
41AQI (US)
41AQI (US)
41AQI (US)
34AQI (US)
43AQI (US)
44AQI (US)
41AQI (US)
38AQI (US)
36AQI (US)
39AQI (US)
36AQI (US)
33AQI (US)
34AQI (US)
38AQI (US)
37AQI (US)
37AQI (US)
42AQI (US)
37AQI (US)
34AQI (US)
28AQI (US)
29AQI (US)
33AQI (US)
30AQI (US)
28AQI (US)
25AQI (US)
33AQI (US)
33AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
30AQI (US)
27AQI (US)
33AQI (US)
29AQI (US)
30AQI (US)
34AQI (US)
28AQI (US)
33AQI (US)
33AQI (US)
33AQI (US)
31AQI (US)
32AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
24AQI (US)
26AQI (US)
31AQI (US)
33AQI (US)
29AQI (US)
24AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
24AQI (US)
22AQI (US)
30AQI (US)
33AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
34AQI (US)
31AQI (US)
28AQI (US)
29AQI (US)
23AQI (US)
46AQI (US)
54AQI (US)
55AQI (US)
58AQI (US)
54AQI (US)
50AQI (US)
46AQI (US)
42AQI (US)
51AQI (US)
47AQI (US)
45AQI (US)
30AQI (US)
27AQI (US)
18AQI (US)
19AQI (US)
25AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
21AQI (US)
24AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
23AQI (US)
24AQI (US)
27AQI (US)
26AQI (US)
30AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
20AQI (US)
23AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
26AQI (US)
35AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
25AQI (US)
24AQI (US)
24AQI (US)
29AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
31AQI (US)
29AQI (US)
31AQI (US)
30AQI (US)
32AQI (US)
29AQI (US)
39AQI (US)
49AQI (US)
37AQI (US)
28AQI (US)
39AQI (US)
31AQI (US)
23AQI (US)
35AQI (US)
38AQI (US)
33AQI (US)
40AQI (US)
39AQI (US)
41AQI (US)
38AQI (US)
34AQI (US)
40AQI (US)
45AQI (US)
37AQI (US)
29AQI (US)
33AQI (US)
37AQI (US)
45AQI (US)
45AQI (US)
29AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
32AQI (US)
30AQI (US)
35AQI (US)
45AQI (US)
35AQI (US)
26AQI (US)
33AQI (US)
39AQI (US)
28AQI (US)
25AQI (US)
28AQI (US)
34AQI (US)
37AQI (US)
25AQI (US)
29AQI (US)
30AQI (US)
27AQI (US)
28AQI (US)
23AQI (US)
26AQI (US)
28AQI (US)
22AQI (US)
27AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
32AQI (US)
32AQI (US)
29AQI (US)
24AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
33AQI (US)
25AQI (US)
29AQI (US)
28AQI (US)
27AQI (US)
37AQI (US)
28AQI (US)
29AQI (US)
35AQI (US)
40AQI (US)
37AQI (US)
27AQI (US)
31AQI (US)
28AQI (US)
44AQI (US)
38AQI (US)
30AQI (US)
35AQI (US)
26AQI (US)
32AQI (US)
32AQI (US)
29AQI (US)
No. of days
202633AQI (US)
Highest AQI (US) recorded in
February44AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202523AQI (US)
Highest AQI (US) recorded in
June29AQI (US)
Lowest AQI (US) recorded in
May19AQI (US)
202418AQI (US)
Highest AQI (US) recorded in
August25AQI (US)
Lowest AQI (US) recorded in
November13AQI (US)
202322AQI (US)
Highest AQI (US) recorded in
June27AQI (US)
Lowest AQI (US) recorded in
January18AQI (US)
202221AQI (US)
Highest AQI (US) recorded in
July27AQI (US)
Lowest AQI (US) recorded in
May18AQI (US)
202122AQI (US)
Highest AQI (US) recorded in
August29AQI (US)
Lowest AQI (US) recorded in
January17AQI (US)
202022AQI (US)
Highest AQI (US) recorded in
July27AQI (US)
Lowest AQI (US) recorded in
September18AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Halifax's annual 2026 AQI (US) (33) shows an average percentage change of 55.6% (worsened AQI (US)) compared to previous years: 2020 (22), 2021 (22), 2022 (21), 2023 (22), 2024 (18), 2025 (23).