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!
October Air Quality Analysis
Downtown, Calgary, Alberta, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (1st October):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 42 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 30th Sep - 1st Oct 2026
Downtown, Calgary, Alberta, Canada
7 AM30th Sep 2026
7 PM
6 AM1st Oct 2026
65AQI
40AQI
58AQI
21AQI
In the last 24 hours,
Downtown's AQI reached its highest point of 65 at 11 AM during the Day, while the lowest point, 21, was recorded at 11 PM during the Night between 30th Sep and 1st Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Downtown, Calgary, Alberta, Canada
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
9°C3/14°C
8°C1/14°C
48AQI
43AQI
46AQI
35AQI
2026 Days Vs Air Quality
Downtown, Calgary, Alberta, Canada
83%
224
15%
42
2%
5
Total number of days with different AQI categories in last 274 days in 2026 (91 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2026, 83% of 274 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)
50AQI (US)
42AQI (US)
39AQI (US)
40AQI (US)
33AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
49AQI (US)
63AQI (US)
44AQI (US)
42AQI (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).