James Street South, Thunder Bay, Ontario, 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
James Street South, Thunder Bay, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 55 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Sep - 17th Sep 2025
James Street South, Thunder Bay, Ontario, Canada
7 AM16th Sep 2025
8 PM
6 AM17th Sep 2025
57AQI
55AQI
58AQI
54AQI
In the last 24 hours,
James Street South's AQI reached its highest point of 58 at 9 PM during the Night, while the lowest point, 54, was recorded at 11 PM during the Night between 16th Sep and 17th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
James Street South, Thunder Bay, Ontario, Canada
15°C11/19°C
18°C15/22°C
18°C13/23°C
17°C13/24°C
21°C16/29°C
19°C14/23°C
14°C12/18°C
14°C6/21°C
14°C5/23°C
18°C13/23°C
13°C9/19°C
13°C5/21°C
18°C10/27°C
17°C11/23°C
18°C16/22°C
17°C13/22°C
9°C6/8°C
8°C3/13°C
8°C4/11°C
10°C5/16°C
12°C6/16°C
12°C5/17°C
15°C11/19°C
13°C10/18°C
14°C11/19°C
13°C10/16°C
16°C12/21°C
13°C9/15°C
16°C13/20°C
17°C13/25°C
--°C/°C
31AQI
27AQI
32AQI
29AQI
2025 Days Vs Air Quality
James Street South, Thunder Bay, Ontario, Canada
79%
138
18%
32
2%
3
0.5%
1
Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)
Under WHO’s Safe Air Quality Limits: 79%
Health Risk Level:
Low
In 2025, 79% of 260 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
James Street South, Thunder Bay, Ontario, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
19AQI
16AQI
17AQI
17AQI
21AQI
18AQI
17AQI
22AQI
17AQI
18AQI
15AQI
16AQI
20AQI
29AQI
34AQI
36AQI
47AQI
29AQI
14AQI
16AQI
18AQI
23AQI
16AQI
20AQI
14AQI
18AQI
15AQI
15AQI
17AQI
17AQI
22AQI
25AQI
16AQI
15AQI
18AQI
17AQI
15AQI
16AQI
20AQI
26AQI
18AQI
17AQI
26AQI
20AQI
17AQI
26AQI
36AQI
33AQI
25AQI
24AQI
16AQI
17AQI
14AQI
14AQI
17AQI
14AQI
12AQI
15AQI
18AQI
19AQI
22AQI
23AQI
31AQI
29AQI
31AQI
29AQI
30AQI
49AQI
45AQI
55AQI
47AQI
59AQI
54AQI
59AQI
55AQI
61AQI
47AQI
31AQI
25AQI
28AQI
32AQI
31AQI
41AQI
36AQI
30AQI
33AQI
33AQI
33AQI
31AQI
38AQI
36AQI
27AQI
28AQI
26AQI
24AQI
31AQI
38AQI
37AQI
36AQI
43AQI
41AQI
29AQI
29AQI
30AQI
31AQI
33AQI
36AQI
53AQI
79AQI
84AQI
52AQI
39AQI
52AQI
43AQI
53AQI
54AQI
51AQI
52AQI
54AQI
53AQI
59AQI
43AQI
41AQI
56AQI
70AQI
124AQI
157AQI
147AQI
103AQI
79AQI
81AQI
69AQI
66AQI
57AQI
54AQI
43AQI
53AQI
63AQI
64AQI
59AQI
57AQI
45AQI
19AQI
17AQI
22AQI
21AQI
21AQI
31AQI
24AQI
16AQI
18AQI
23AQI
28AQI
27AQI
20AQI
23AQI
38AQI
43AQI
39AQI
30AQI
19AQI
17AQI
16AQI
19AQI
26AQI
40AQI
39AQI
25AQI
38AQI
42AQI
46AQI
48AQI
55AQI
17AQI
21AQI
21AQI
38AQI
49AQI
50AQI
34AQI
No. of days
202535AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
March17AQI
Most & Least Polluted Years Over the Last 1 Years
James Street South's annual 2025 AQI (35) shows an average percentage change of NaN% (improved AQI) compared to previous years: .