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 (26th September):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 32 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 25th Sep - 26th Sep 2026
Downtown, Calgary, Alberta, Canada
7 AM25th Sep 2026
8 PM
6 AM26th Sep 2026
69AQI
54AQI
58AQI
42AQI
In the last 24 hours,
Downtown's AQI reached its highest point of 69 at 3 PM during the Day, while the lowest point, 42, was recorded at 3 AM during the Night between 25th Sep and 26th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Downtown, Calgary, Alberta, Canada
19°C14/26°C
17°C9/25°C
13°C9/18°C
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
50AQI
41AQI
46AQI
39AQI
2026 Days Vs Air Quality
Downtown, Calgary, Alberta, Canada
82%
219
16%
42
2%
5
Total number of days with different AQI categories in last 269 days in 2026 (96 days remaining)
Under WHO’s Safe Air Quality Limits: 82%
Health Risk Level:
Low
In 2026, 82% of 269 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)
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).