Peterborough, 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
Peterborough, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 36 of Good air quality, showing improvement over 2023 on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Peterborough, Ontario, Canada
6 AM29th Sep 2026
7 PM
5 AM30th Sep 2026
52AQI
25AQI
82AQI
25AQI
In the last 24 hours,
Peterborough's AQI reached its highest point of 82 at 10 PM during the Night, while the lowest point, 25, was recorded at 3 AM during the Night between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Peterborough, Ontario, Canada
21°C19/24°C
22°C18/29°C
21°C16/28°C
19°C12/26°C
18°C11/24°C
17°C12/23°C
18°C10/25°C
18°C11/26°C
20°C17/24°C
19°C14/25°C
16°C7/24°C
17°C7/27°C
20°C14/25°C
14°C8/20°C
15°C10/20°C
21°C16/25°C
19°C13/26°C
15°C11/21°C
11°C5/19°C
14°C9/21°C
10°C5/15°C
10°C5/18°C
12°C6/20°C
12°C6/20°C
14°C6/22°C
15°C9/23°C
16°C10/23°C
15°C12/22°C
17°C12/23°C
17°C14/22°C
34AQI
27AQI
37AQI
30AQI
2026 Days Vs Air Quality
Peterborough, Ontario, Canada
92%
248
8%
21
Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2026, 92% of 273 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Peterborough, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
8AQI (US)
8AQI (US)
9AQI (US)
30AQI (US)
44AQI (US)
67AQI (US)
53AQI (US)
42AQI (US)
30AQI (US)
12AQI (US)
14AQI (US)
26AQI (US)
42AQI (US)
33AQI (US)
11AQI (US)
12AQI (US)
30AQI (US)
28AQI (US)
32AQI (US)
10AQI (US)
24AQI (US)
58AQI (US)
61AQI (US)
48AQI (US)
51AQI (US)
48AQI (US)
40AQI (US)
44AQI (US)
50AQI (US)
58AQI (US)
46AQI (US)
48AQI (US)
52AQI (US)
48AQI (US)
44AQI (US)
52AQI (US)
51AQI (US)
40AQI (US)
44AQI (US)
49AQI (US)
46AQI (US)
40AQI (US)
40AQI (US)
48AQI (US)
51AQI (US)
44AQI (US)
48AQI (US)
52AQI (US)
44AQI (US)
42AQI (US)
40AQI (US)
36AQI (US)
36AQI (US)
40AQI (US)
46AQI (US)
48AQI (US)
37AQI (US)
40AQI (US)
40AQI (US)
40AQI (US)
62AQI (US)
48AQI (US)
48AQI (US)
43AQI (US)
36AQI (US)
44AQI (US)
44AQI (US)
40AQI (US)
36AQI (US)
46AQI (US)
42AQI (US)
44AQI (US)
36AQI (US)
33AQI (US)
38AQI (US)
34AQI (US)
34AQI (US)
39AQI (US)
46AQI (US)
42AQI (US)
38AQI (US)
42AQI (US)
37AQI (US)
34AQI (US)
38AQI (US)
28AQI (US)
31AQI (US)
30AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
30AQI (US)
30AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
28AQI (US)
34AQI (US)
30AQI (US)
31AQI (US)
31AQI (US)
30AQI (US)
33AQI (US)
38AQI (US)
36AQI (US)
32AQI (US)
29AQI (US)
32AQI (US)
28AQI (US)
28AQI (US)
24AQI (US)
24AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
36AQI (US)
37AQI (US)
30AQI (US)
26AQI (US)
28AQI (US)
32AQI (US)
28AQI (US)
26AQI (US)
36AQI (US)
22AQI (US)
44AQI (US)
49AQI (US)
77AQI (US)
60AQI (US)
46AQI (US)
51AQI (US)
44AQI (US)
44AQI (US)
50AQI (US)
43AQI (US)
46AQI (US)
38AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
30AQI (US)
31AQI (US)
32AQI (US)
32AQI (US)
29AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
33AQI (US)
30AQI (US)
32AQI (US)
38AQI (US)
34AQI (US)
27AQI (US)
30AQI (US)
54AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
34AQI (US)
32AQI (US)
68AQI (US)
49AQI (US)
40AQI (US)
74AQI (US)
83AQI (US)
54AQI (US)
52AQI (US)
38AQI (US)
34AQI (US)
42AQI (US)
28AQI (US)
33AQI (US)
28AQI (US)
26AQI (US)
32AQI (US)
38AQI (US)
42AQI (US)
24AQI (US)
27AQI (US)
34AQI (US)
34AQI (US)
30AQI (US)
30AQI (US)
26AQI (US)
28AQI (US)
37AQI (US)
36AQI (US)
34AQI (US)
27AQI (US)
32AQI (US)
28AQI (US)
31AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
34AQI (US)
28AQI (US)
28AQI (US)
30AQI (US)
24AQI (US)
28AQI (US)
30AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
34AQI (US)
32AQI (US)
28AQI (US)
33AQI (US)
35AQI (US)
34AQI (US)
32AQI (US)
32AQI (US)
26AQI (US)
26AQI (US)
32AQI (US)
45AQI (US)
31AQI (US)
25AQI (US)
28AQI (US)
35AQI (US)
32AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
32AQI (US)
39AQI (US)
44AQI (US)
26AQI (US)
36AQI (US)
34AQI (US)
45AQI (US)
39AQI (US)
30AQI (US)
37AQI (US)
28AQI (US)
39AQI (US)
30AQI (US)
31AQI (US)
No. of days
202635AQI (US)
Highest AQI (US) recorded in
February45AQI (US)
Lowest AQI (US) recorded in
June28AQI (US)
202531AQI (US)
Highest AQI (US) recorded in
August46AQI (US)
Lowest AQI (US) recorded in
May20AQI (US)
202429AQI (US)
Highest AQI (US) recorded in
February34AQI (US)
Lowest AQI (US) recorded in
November18AQI (US)
202337AQI (US)
Highest AQI (US) recorded in
June71AQI (US)
Lowest AQI (US) recorded in
October28AQI (US)
202233AQI (US)
Highest AQI (US) recorded in
May37AQI (US)
Lowest AQI (US) recorded in
August21AQI (US)
202133AQI (US)
Highest AQI (US) recorded in
August40AQI (US)
Lowest AQI (US) recorded in
October25AQI (US)
202030AQI (US)
Highest AQI (US) recorded in
May36AQI (US)
Lowest AQI (US) recorded in
October22AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Peterborough's annual 2026 AQI (US) (35) shows an average percentage change of 9.4% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (33), 2022 (33), 2023 (37), 2024 (29), 2025 (31).