Lethbridge, 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
Lethbridge, Alberta, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (10th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 48 of Good air quality, showing improvement over 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 9th Oct - 10th Oct 2025
Lethbridge, Alberta, Canada
7 AM9th Oct 2025
7 PM
6 AM10th Oct 2025
56AQI
43AQI
57AQI
40AQI
In the last 24 hours,
Lethbridge's AQI reached its highest point of 57 at 12 AM during the Night, while the lowest point, 40, was recorded at 5 AM during the Night between 9th Oct and 10th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Lethbridge, Alberta, Canada
--°C/°C
17°C6/28°C
19°C7/30°C
18°C7/29°C
20°C10/30°C
20°C15/25°C
19°C12/28°C
18°C7/30°C
18°C10/29°C
17°C8/28°C
19°C8/31°C
19°C13/28°C
16°C9/24°C
19°C10/30°C
17°C11/29°C
16°C2/31°C
16°C7/24°C
18°C12/27°C
14°C7/20°C
16°C5/31°C
17°C10/25°C
14°C8/22°C
14°C8/22°C
14°C7/23°C
10°C6/13°C
5°C1/12°C
8°C0/18°C
14°C5/25°C
12°C7/19°C
8°C0/19°C
10°C0/25°C
48AQI
42AQI
47AQI
43AQI
2025 Days Vs Air Quality
Lethbridge, Alberta, Canada
89%
251
11%
31
0.3%
1
Total number of days with different AQI categories in last 284 days in 2025 (81 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 284 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
Lethbridge, Alberta, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
47AQI
53AQI
46AQI
28AQI
48AQI
65AQI
42AQI
31AQI
33AQI
34AQI
24AQI
37AQI
39AQI
38AQI
38AQI
26AQI
23AQI
23AQI
35AQI
37AQI
25AQI
25AQI
26AQI
21AQI
24AQI
24AQI
25AQI
26AQI
31AQI
37AQI
41AQI
33AQI
28AQI
32AQI
28AQI
30AQI
33AQI
38AQI
41AQI
47AQI
28AQI
26AQI
32AQI
39AQI
33AQI
29AQI
42AQI
38AQI
26AQI
32AQI
37AQI
24AQI
21AQI
18AQI
18AQI
20AQI
20AQI
19AQI
23AQI
30AQI
33AQI
32AQI
25AQI
22AQI
30AQI
20AQI
18AQI
26AQI
21AQI
20AQI
24AQI
24AQI
25AQI
25AQI
26AQI
28AQI
30AQI
25AQI
20AQI
16AQI
16AQI
14AQI
16AQI
18AQI
26AQI
24AQI
23AQI
18AQI
19AQI
21AQI
22AQI
26AQI
20AQI
20AQI
18AQI
19AQI
19AQI
12AQI
13AQI
20AQI
24AQI
17AQI
15AQI
21AQI
18AQI
19AQI
16AQI
17AQI
18AQI
21AQI
20AQI
15AQI
20AQI
30AQI
22AQI
23AQI
31AQI
22AQI
16AQI
15AQI
25AQI
20AQI
30AQI
21AQI
15AQI
21AQI
18AQI
21AQI
24AQI
28AQI
20AQI
18AQI
21AQI
30AQI
21AQI
37AQI
22AQI
22AQI
15AQI
13AQI
13AQI
23AQI
20AQI
18AQI
16AQI
18AQI
19AQI
24AQI
26AQI
26AQI
20AQI
19AQI
16AQI
21AQI
28AQI
31AQI
25AQI
32AQI
55AQI
53AQI
52AQI
56AQI
60AQI
43AQI
27AQI
24AQI
25AQI
29AQI
35AQI
28AQI
30AQI
24AQI
24AQI
30AQI
45AQI
42AQI
31AQI
20AQI
15AQI
15AQI
17AQI
28AQI
29AQI
26AQI
20AQI
22AQI
19AQI
18AQI
23AQI
34AQI
25AQI
21AQI
24AQI
23AQI
18AQI
26AQI
44AQI
39AQI
37AQI
29AQI
26AQI
31AQI
36AQI
36AQI
35AQI
32AQI
23AQI
38AQI
36AQI
39AQI
42AQI
46AQI
53AQI
39AQI
32AQI
33AQI
33AQI
33AQI
23AQI
20AQI
26AQI
30AQI
23AQI
26AQI
42AQI
31AQI
37AQI
43AQI
28AQI
21AQI
35AQI
43AQI
26AQI
31AQI
41AQI
37AQI
48AQI
51AQI
51AQI
51AQI
50AQI
44AQI
53AQI
61AQI
65AQI
79AQI
107AQI
83AQI
67AQI
92AQI
79AQI
62AQI
58AQI
58AQI
57AQI
46AQI
58AQI
54AQI
50AQI
54AQI
54AQI
56AQI
56AQI
59AQI
35AQI
23AQI
26AQI
43AQI
37AQI
40AQI
44AQI
34AQI
28AQI
31AQI
42AQI
45AQI
34AQI
27AQI
54AQI
48AQI
42AQI
48AQI
48AQI
34AQI
30AQI
23AQI
20AQI
21AQI
32AQI
30AQI
37AQI
56AQI
42AQI
No. of days
202532AQI
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
April20AQI
202428AQI
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
April18AQI
202329AQI
Highest AQI recorded in
June53AQI
Lowest AQI recorded in
December12AQI
202222AQI
Highest AQI recorded in
September49AQI
Lowest AQI recorded in
February11AQI
202126AQI
Highest AQI recorded in
July68AQI
Lowest AQI recorded in
November12AQI
202023AQI
Highest AQI recorded in
September38AQI
Lowest AQI recorded in
June13AQI
Most & Least Polluted Years Over the Last 6 Years
Lethbridge's annual 2025 AQI (32) shows an average percentage change of 25.05% (worsened AQI) compared to previous years: 2020 (23), 2021 (26), 2022 (22), 2023 (29), 2024 (28).