Port Stanley, St Thomas, Ontario, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Port Stanley, St Thomas, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (6th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 35 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 6th Aug - 7th Aug 2026
Port Stanley, St Thomas, Ontario, Canada
6 AM6th Aug 2026
8 PM
5 AM7th Aug 2026
54AQI
21AQI
51AQI
25AQI
In the last 24 hours,
Port Stanley's AQI reached its highest point of 54 at 8 PM during the Day, while the lowest point, 21, was recorded at 1 PM during the Day between 6th Aug and 7th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Port Stanley, St Thomas, Ontario, Canada
25°C21/31°C
23°C20/28°C
24°C17/29°C
23°C16/29°C
23°C15/31°C
27°C20/34°C
28°C23/35°C
23°C19/29°C
21°C14/28°C
25°C19/32°C
20°C15/25°C
19°C11/26°C
23°C19/28°C
18°C14/23°C
18°C10/24°C
19°C13/26°C
21°C15/27°C
22°C16/27°C
23°C18/29°C
22°C18/26°C
22°C16/27°C
22°C14/29°C
22°C16/29°C
24°C19/29°C
20°C18/22°C
20°C15/25°C
19°C11/26°C
21°C13/28°C
23°C18/28°C
23°C21/27°C
55AQI
44AQI
54AQI
46AQI
2026 Days Vs Air Quality
Port Stanley, St Thomas, Ontario, Canada
81%
174
17%
37
1%
3
0.4%
1
Total number of days with different AQI categories in last 219 days in 2026 (146 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2026, 81% of 219 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
Port Stanley, St Thomas, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
9AQI (US)
11AQI (US)
19AQI (US)
20AQI (US)
59AQI (US)
83AQI (US)
50AQI (US)
49AQI (US)
20AQI (US)
16AQI (US)
15AQI (US)
20AQI (US)
30AQI (US)
24AQI (US)
12AQI (US)
17AQI (US)
33AQI (US)
21AQI (US)
29AQI (US)
23AQI (US)
23AQI (US)
52AQI (US)
60AQI (US)
48AQI (US)
50AQI (US)
48AQI (US)
43AQI (US)
42AQI (US)
49AQI (US)
59AQI (US)
42AQI (US)
46AQI (US)
74AQI (US)
73AQI (US)
44AQI (US)
54AQI (US)
76AQI (US)
39AQI (US)
42AQI (US)
46AQI (US)
47AQI (US)
38AQI (US)
38AQI (US)
51AQI (US)
83AQI (US)
79AQI (US)
102AQI (US)
114AQI (US)
62AQI (US)
46AQI (US)
50AQI (US)
41AQI (US)
33AQI (US)
39AQI (US)
43AQI (US)
58AQI (US)
31AQI (US)
71AQI (US)
38AQI (US)
37AQI (US)
50AQI (US)
58AQI (US)
95AQI (US)
75AQI (US)
58AQI (US)
80AQI (US)
35AQI (US)
34AQI (US)
59AQI (US)
44AQI (US)
38AQI (US)
43AQI (US)
35AQI (US)
32AQI (US)
37AQI (US)
34AQI (US)
36AQI (US)
64AQI (US)
81AQI (US)
40AQI (US)
58AQI (US)
39AQI (US)
34AQI (US)
45AQI (US)
61AQI (US)
29AQI (US)
31AQI (US)
35AQI (US)
42AQI (US)
66AQI (US)
30AQI (US)
30AQI (US)
39AQI (US)
28AQI (US)
31AQI (US)
27AQI (US)
27AQI (US)
37AQI (US)
49AQI (US)
33AQI (US)
30AQI (US)
47AQI (US)
46AQI (US)
48AQI (US)
41AQI (US)
50AQI (US)
40AQI (US)
33AQI (US)
29AQI (US)
33AQI (US)
37AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
30AQI (US)
32AQI (US)
40AQI (US)
39AQI (US)
27AQI (US)
34AQI (US)
30AQI (US)
27AQI (US)
28AQI (US)
42AQI (US)
22AQI (US)
40AQI (US)
56AQI (US)
65AQI (US)
63AQI (US)
44AQI (US)
49AQI (US)
44AQI (US)
44AQI (US)
51AQI (US)
40AQI (US)
44AQI (US)
32AQI (US)
29AQI (US)
24AQI (US)
24AQI (US)
23AQI (US)
28AQI (US)
32AQI (US)
28AQI (US)
38AQI (US)
28AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
25AQI (US)
27AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
20AQI (US)
23AQI (US)
24AQI (US)
24AQI (US)
38AQI (US)
27AQI (US)
33AQI (US)
28AQI (US)
26AQI (US)
30AQI (US)
48AQI (US)
60AQI (US)
39AQI (US)
26AQI (US)
30AQI (US)
29AQI (US)
32AQI (US)
28AQI (US)
29AQI (US)
32AQI (US)
35AQI (US)
44AQI (US)
45AQI (US)
31AQI (US)
56AQI (US)
89AQI (US)
212AQI (US)
117AQI (US)
86AQI (US)
79AQI (US)
65AQI (US)
23AQI (US)
25AQI (US)
31AQI (US)
24AQI (US)
33AQI (US)
50AQI (US)
57AQI (US)
24AQI (US)
33AQI (US)
31AQI (US)
47AQI (US)
34AQI (US)
31AQI (US)
32AQI (US)
36AQI (US)
35AQI (US)
35AQI (US)
56AQI (US)
49AQI (US)
34AQI (US)
37AQI (US)
27AQI (US)
50AQI (US)
36AQI (US)
No. of days
202641AQI (US)
Highest AQI (US) recorded in
February56AQI (US)
Lowest AQI (US) recorded in
June27AQI (US)
202534AQI (US)
Highest AQI (US) recorded in
August49AQI (US)
Lowest AQI (US) recorded in
May22AQI (US)
202433AQI (US)
Highest AQI (US) recorded in
January37AQI (US)
Lowest AQI (US) recorded in
November26AQI (US)
202341AQI (US)
Highest AQI (US) recorded in
June73AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202233AQI (US)
Highest AQI (US) recorded in
June37AQI (US)
Lowest AQI (US) recorded in
August21AQI (US)
202136AQI (US)
Highest AQI (US) recorded in
July48AQI (US)
Lowest AQI (US) recorded in
November27AQI (US)
202033AQI (US)
Highest AQI (US) recorded in
June37AQI (US)
Lowest AQI (US) recorded in
October28AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Port Stanley's annual 2026 AQI (US) (41) shows an average percentage change of 17.8% (worsened AQI (US)) compared to previous years: 2020 (33), 2021 (36), 2022 (33), 2023 (41), 2024 (33), 2025 (34).