Downtown, Calgary, Alberta, 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
Downtown, Calgary, Alberta, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 46 of Good air quality on the same day.
Day & Night AQI Trend: 28th Sep - 29th Sep 2026
Downtown, Calgary, Alberta, Canada
7 AM28th Sep 2026
7 PM
6 AM29th Sep 2026
52AQI
10AQI
63AQI
24AQI
In the last 24 hours,
Downtown's AQI reached its highest point of 63 at 5 AM during the Night, while the lowest point, 10, was recorded at 8 AM during the Day between 28th Sep and 29th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Downtown, Calgary, Alberta, Canada
17°C11/25°C
18°C11/29°C
19°C13/26°C
17°C12/21°C
13°C8/18°C
10°C8/11°C
12°C8/16°C
12°C11/14°C
15°C9/22°C
19°C13/25°C
13°C8/17°C
8°C5/11°C
8°C4/12°C
9°C4/15°C
10°C7/13°C
8°C7/9°C
10°C4/18°C
13°C7/21°C
14°C8/21°C
15°C9/21°C
16°C9/24°C
18°C11/27°C
16°C12/20°C
14°C9/21°C
12°C7/18°C
16°C10/26°C
7°C4/9°C
7°C1/14°C
10°C3/20°C
12°C7/17°C
48AQI
43AQI
44AQI
37AQI
2026 Days Vs Air Quality
Downtown, Calgary, Alberta, Canada
83%
222
16%
42
2%
5
Total number of days with different AQI categories in last 272 days in 2026 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2026, 83% of 272 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Downtown, Calgary, Alberta, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
48AQI (US)
35AQI (US)
34AQI (US)
48AQI (US)
53AQI (US)
50AQI (US)
22AQI (US)
44AQI (US)
46AQI (US)
21AQI (US)
27AQI (US)
31AQI (US)
16AQI (US)
29AQI (US)
24AQI (US)
27AQI (US)
35AQI (US)
22AQI (US)
46AQI (US)
41AQI (US)
26AQI (US)
49AQI (US)
52AQI (US)
50AQI (US)
53AQI (US)
52AQI (US)
50AQI (US)
46AQI (US)
51AQI (US)
46AQI (US)
41AQI (US)
45AQI (US)
49AQI (US)
48AQI (US)
50AQI (US)
51AQI (US)
45AQI (US)
41AQI (US)
45AQI (US)
46AQI (US)
33AQI (US)
27AQI (US)
24AQI (US)
36AQI (US)
43AQI (US)
31AQI (US)
37AQI (US)
42AQI (US)
32AQI (US)
33AQI (US)
38AQI (US)
50AQI (US)
41AQI (US)
48AQI (US)
45AQI (US)
35AQI (US)
28AQI (US)
33AQI (US)
35AQI (US)
32AQI (US)
41AQI (US)
44AQI (US)
44AQI (US)
42AQI (US)
28AQI (US)
36AQI (US)
38AQI (US)
37AQI (US)
25AQI (US)
32AQI (US)
39AQI (US)
33AQI (US)
33AQI (US)
22AQI (US)
25AQI (US)
35AQI (US)
32AQI (US)
32AQI (US)
34AQI (US)
31AQI (US)
28AQI (US)
25AQI (US)
37AQI (US)
32AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
29AQI (US)
33AQI (US)
26AQI (US)
30AQI (US)
21AQI (US)
23AQI (US)
23AQI (US)
22AQI (US)
20AQI (US)
23AQI (US)
27AQI (US)
29AQI (US)
31AQI (US)
36AQI (US)
33AQI (US)
31AQI (US)
21AQI (US)
16AQI (US)
19AQI (US)
23AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
28AQI (US)
25AQI (US)
21AQI (US)
27AQI (US)
27AQI (US)
22AQI (US)
20AQI (US)
20AQI (US)
27AQI (US)
29AQI (US)
24AQI (US)
20AQI (US)
25AQI (US)
25AQI (US)
22AQI (US)
21AQI (US)
20AQI (US)
21AQI (US)
35AQI (US)
39AQI (US)
40AQI (US)
28AQI (US)
32AQI (US)
29AQI (US)
23AQI (US)
29AQI (US)
23AQI (US)
24AQI (US)
20AQI (US)
23AQI (US)
24AQI (US)
30AQI (US)
21AQI (US)
24AQI (US)
29AQI (US)
30AQI (US)
29AQI (US)
28AQI (US)
34AQI (US)
17AQI (US)
18AQI (US)
22AQI (US)
25AQI (US)
19AQI (US)
27AQI (US)
23AQI (US)
26AQI (US)
23AQI (US)
18AQI (US)
19AQI (US)
16AQI (US)
19AQI (US)
16AQI (US)
18AQI (US)
18AQI (US)
14AQI (US)
14AQI (US)
21AQI (US)
19AQI (US)
17AQI (US)
19AQI (US)
27AQI (US)
27AQI (US)
58AQI (US)
103AQI (US)
70AQI (US)
24AQI (US)
17AQI (US)
17AQI (US)
18AQI (US)
15AQI (US)
19AQI (US)
22AQI (US)
46AQI (US)
32AQI (US)
19AQI (US)
24AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
33AQI (US)
45AQI (US)
58AQI (US)
59AQI (US)
49AQI (US)
66AQI (US)
70AQI (US)
124AQI (US)
147AQI (US)
82AQI (US)
70AQI (US)
58AQI (US)
55AQI (US)
46AQI (US)
49AQI (US)
91AQI (US)
129AQI (US)
111AQI (US)
49AQI (US)
47AQI (US)
52AQI (US)
75AQI (US)
58AQI (US)
66AQI (US)
80AQI (US)
66AQI (US)
75AQI (US)
56AQI (US)
46AQI (US)
51AQI (US)
45AQI (US)
53AQI (US)
61AQI (US)
73AQI (US)
68AQI (US)
63AQI (US)
63AQI (US)
75AQI (US)
56AQI (US)
45AQI (US)
42AQI (US)
50AQI (US)
54AQI (US)
75AQI (US)
73AQI (US)
42AQI (US)
46AQI (US)
37AQI (US)
52AQI (US)
46AQI (US)
40AQI (US)
32AQI (US)
38AQI (US)
45AQI (US)
59AQI (US)
42AQI (US)
39AQI (US)
49AQI (US)
40AQI (US)
39AQI (US)
47AQI (US)
35AQI (US)
40AQI (US)
46AQI (US)
49AQI (US)
45AQI (US)
41AQI (US)
48AQI (US)
47AQI (US)
53AQI (US)
51AQI (US)
58AQI (US)
32AQI (US)
39AQI (US)
40AQI (US)
46AQI (US)
39AQI (US)
40AQI (US)
33AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
49AQI (US)
63AQI (US)
44AQI (US)
No. of days
202638AQI (US)
Highest AQI (US) recorded in
August63AQI (US)
Lowest AQI (US) recorded in
June25AQI (US)
202540AQI (US)
Highest AQI (US) recorded in
September60AQI (US)
Lowest AQI (US) recorded in
March29AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Downtown's annual 2026 AQI (US) (38) shows an average percentage change of -5% (improved AQI (US)) compared to previous years: 2025 (40).