Oshawa, Ontario, 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
Oshawa, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 31 of Good air quality, showing improvement over 2025 and 2023 on the same day.
Day & Night AQI Trend: 2nd Oct - 3rd Oct 2026
Oshawa, Ontario, Canada
6 AM2nd Oct 2026
7 PM
5 AM3rd Oct 2026
52AQI
24AQI
38AQI
20AQI
In the last 24 hours,
Oshawa's AQI reached its highest point of 52 at 3 PM during the Day, while the lowest point, 20, was recorded at 12 AM during the Night between 2nd Oct and 3rd Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Oshawa, Ontario, Canada
20°C16/25°C
19°C15/26°C
18°C15/21°C
18°C13/25°C
19°C14/23°C
21°C18/24°C
20°C15/26°C
16°C11/22°C
18°C12/24°C
20°C15/25°C
14°C9/19°C
16°C12/21°C
20°C16/25°C
19°C15/23°C
16°C13/21°C
12°C7/17°C
15°C10/22°C
11°C7/16°C
11°C6/18°C
12°C7/19°C
13°C8/19°C
15°C8/22°C
16°C11/24°C
17°C12/25°C
16°C13/21°C
17°C14/21°C
18°C14/22°C
19°C16/22°C
16°C11/19°C
11°C6/17°C
33AQI
27AQI
38AQI
30AQI
2026 Days Vs Air Quality
Oshawa, Ontario, Canada
92%
251
8%
22
Total number of days with different AQI categories in last 276 days in 2026 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2026, 92% of 276 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
Oshawa, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
11AQI (US)
10AQI (US)
11AQI (US)
42AQI (US)
47AQI (US)
76AQI (US)
70AQI (US)
74AQI (US)
33AQI (US)
14AQI (US)
18AQI (US)
34AQI (US)
44AQI (US)
31AQI (US)
16AQI (US)
24AQI (US)
42AQI (US)
33AQI (US)
36AQI (US)
19AQI (US)
35AQI (US)
59AQI (US)
60AQI (US)
48AQI (US)
50AQI (US)
48AQI (US)
40AQI (US)
44AQI (US)
50AQI (US)
56AQI (US)
46AQI (US)
46AQI (US)
50AQI (US)
48AQI (US)
44AQI (US)
52AQI (US)
49AQI (US)
40AQI (US)
44AQI (US)
48AQI (US)
45AQI (US)
40AQI (US)
40AQI (US)
48AQI (US)
50AQI (US)
44AQI (US)
46AQI (US)
54AQI (US)
44AQI (US)
42AQI (US)
40AQI (US)
38AQI (US)
36AQI (US)
40AQI (US)
46AQI (US)
46AQI (US)
36AQI (US)
38AQI (US)
38AQI (US)
39AQI (US)
62AQI (US)
47AQI (US)
48AQI (US)
42AQI (US)
35AQI (US)
44AQI (US)
41AQI (US)
39AQI (US)
37AQI (US)
45AQI (US)
40AQI (US)
43AQI (US)
36AQI (US)
33AQI (US)
38AQI (US)
35AQI (US)
32AQI (US)
39AQI (US)
44AQI (US)
41AQI (US)
36AQI (US)
40AQI (US)
38AQI (US)
36AQI (US)
37AQI (US)
28AQI (US)
31AQI (US)
30AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
29AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
27AQI (US)
34AQI (US)
30AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
33AQI (US)
39AQI (US)
37AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
28AQI (US)
28AQI (US)
24AQI (US)
25AQI (US)
28AQI (US)
33AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
35AQI (US)
37AQI (US)
30AQI (US)
26AQI (US)
30AQI (US)
31AQI (US)
27AQI (US)
26AQI (US)
36AQI (US)
22AQI (US)
44AQI (US)
48AQI (US)
78AQI (US)
60AQI (US)
46AQI (US)
51AQI (US)
44AQI (US)
44AQI (US)
51AQI (US)
44AQI (US)
46AQI (US)
40AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
30AQI (US)
31AQI (US)
32AQI (US)
32AQI (US)
35AQI (US)
45AQI (US)
36AQI (US)
26AQI (US)
26AQI (US)
36AQI (US)
35AQI (US)
36AQI (US)
27AQI (US)
26AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
25AQI (US)
24AQI (US)
33AQI (US)
40AQI (US)
32AQI (US)
37AQI (US)
36AQI (US)
26AQI (US)
30AQI (US)
58AQI (US)
31AQI (US)
27AQI (US)
26AQI (US)
28AQI (US)
31AQI (US)
28AQI (US)
32AQI (US)
32AQI (US)
41AQI (US)
64AQI (US)
52AQI (US)
44AQI (US)
61AQI (US)
84AQI (US)
72AQI (US)
66AQI (US)
42AQI (US)
37AQI (US)
60AQI (US)
28AQI (US)
30AQI (US)
30AQI (US)
25AQI (US)
44AQI (US)
52AQI (US)
48AQI (US)
26AQI (US)
28AQI (US)
36AQI (US)
38AQI (US)
33AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
38AQI (US)
43AQI (US)
42AQI (US)
31AQI (US)
33AQI (US)
31AQI (US)
36AQI (US)
41AQI (US)
32AQI (US)
30AQI (US)
26AQI (US)
29AQI (US)
34AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
28AQI (US)
29AQI (US)
32AQI (US)
26AQI (US)
35AQI (US)
30AQI (US)
27AQI (US)
34AQI (US)
32AQI (US)
29AQI (US)
40AQI (US)
32AQI (US)
34AQI (US)
34AQI (US)
36AQI (US)
34AQI (US)
32AQI (US)
34AQI (US)
27AQI (US)
27AQI (US)
32AQI (US)
44AQI (US)
34AQI (US)
26AQI (US)
29AQI (US)
37AQI (US)
34AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
39AQI (US)
44AQI (US)
26AQI (US)
36AQI (US)
32AQI (US)
32AQI (US)
36AQI (US)
31AQI (US)
39AQI (US)
44AQI (US)
38AQI (US)
30AQI (US)
37AQI (US)
30AQI (US)
42AQI (US)
32AQI (US)
32AQI (US)
33AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
February44AQI (US)
Lowest AQI (US) recorded in
June30AQI (US)
202534AQI (US)
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
May21AQI (US)
202430AQI (US)
Highest AQI (US) recorded in
June37AQI (US)
Lowest AQI (US) recorded in
November23AQI (US)
202335AQI (US)
Highest AQI (US) recorded in
June61AQI (US)
Lowest AQI (US) recorded in
October28AQI (US)
202229AQI (US)
Highest AQI (US) recorded in
January34AQI (US)
Lowest AQI (US) recorded in
August19AQI (US)
202131AQI (US)
Highest AQI (US) recorded in
June35AQI (US)
Lowest AQI (US) recorded in
September22AQI (US)
202030AQI (US)
Highest AQI (US) recorded in
May34AQI (US)
Lowest AQI (US) recorded in
October23AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Oshawa's annual 2026 AQI (US) (36) shows an average percentage change of 14.8% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (31), 2022 (29), 2023 (35), 2024 (30), 2025 (34).