Greater Sudbury, 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
Greater Sudbury, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (11th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 32 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Oct - 11th Oct 2025
Greater Sudbury, Ontario, Canada
7 AM10th Oct 2025
7 PM
6 AM11th Oct 2025
56AQI
24AQI
39AQI
20AQI
In the last 24 hours,
Greater Sudbury's AQI reached its highest point of 56 at 11 AM during the Day, while the lowest point, 20, was recorded at 9 PM during the Night between 10th Oct and 11th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Greater Sudbury, Ontario, Canada
--°C/°C
14°C6/21°C
18°C13/23°C
16°C12/20°C
16°C8/25°C
17°C8/26°C
16°C5/24°C
16°C12/19°C
11°C8/15°C
11°C4/18°C
13°C4/24°C
16°C14/22°C
17°C13/20°C
18°C15/23°C
18°C15/24°C
14°C10/20°C
13°C4/22°C
16°C7/25°C
17°C8/28°C
15°C8/21°C
11°C3/19°C
12°C4/23°C
14°C5/28°C
18°C9/30°C
20°C13/31°C
19°C14/28°C
14°C8/20°C
7°C3/13°C
5°C-3/14°C
9°C2/15°C
11°C7/15°C
34AQI
29AQI
35AQI
29AQI
2025 Days Vs Air Quality
Greater Sudbury, Ontario, Canada
82%
164
18%
35
Total number of days with different AQI categories in last 285 days in 2025 (80 days remaining)
Under WHO’s Safe Air Quality Limits: 82%
Health Risk Level:
Low
In 2025, 82% of 285 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
Greater Sudbury, Ontario, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
20AQI
16AQI
17AQI
16AQI
16AQI
20AQI
18AQI
19AQI
28AQI
17AQI
19AQI
14AQI
23AQI
27AQI
29AQI
34AQI
38AQI
29AQI
13AQI
13AQI
26AQI
30AQI
31AQI
16AQI
19AQI
14AQI
23AQI
26AQI
22AQI
14AQI
16AQI
30AQI
24AQI
15AQI
27AQI
17AQI
14AQI
21AQI
20AQI
19AQI
18AQI
16AQI
24AQI
21AQI
18AQI
27AQI
40AQI
30AQI
31AQI
34AQI
29AQI
16AQI
13AQI
15AQI
15AQI
12AQI
11AQI
13AQI
17AQI
21AQI
24AQI
27AQI
24AQI
26AQI
18AQI
15AQI
22AQI
40AQI
66AQI
57AQI
63AQI
67AQI
65AQI
61AQI
57AQI
61AQI
51AQI
28AQI
27AQI
35AQI
43AQI
43AQI
35AQI
35AQI
25AQI
49AQI
51AQI
51AQI
48AQI
38AQI
31AQI
26AQI
28AQI
28AQI
33AQI
28AQI
35AQI
30AQI
30AQI
35AQI
49AQI
31AQI
28AQI
39AQI
35AQI
40AQI
46AQI
43AQI
57AQI
66AQI
70AQI
35AQI
31AQI
40AQI
36AQI
31AQI
27AQI
24AQI
29AQI
42AQI
59AQI
58AQI
53AQI
45AQI
63AQI
69AQI
55AQI
82AQI
100AQI
81AQI
45AQI
56AQI
72AQI
69AQI
57AQI
56AQI
57AQI
53AQI
51AQI
49AQI
48AQI
55AQI
24AQI
15AQI
18AQI
20AQI
24AQI
28AQI
25AQI
19AQI
15AQI
16AQI
21AQI
22AQI
18AQI
20AQI
27AQI
30AQI
31AQI
29AQI
18AQI
20AQI
17AQI
17AQI
23AQI
25AQI
28AQI
28AQI
30AQI
41AQI
44AQI
35AQI
35AQI
42AQI
32AQI
20AQI
18AQI
26AQI
30AQI
35AQI
35AQI
31AQI
25AQI
38AQI
26AQI
26AQI
21AQI
19AQI
37AQI
42AQI
57AQI
58AQI
54AQI
26AQI
23AQI
21AQI
31AQI
32AQI
19AQI
22AQI
21AQI
43AQI
42AQI
42AQI
29AQI
36AQI
No. of days
202533AQI
Highest AQI recorded in
June43AQI
Lowest AQI recorded in
March19AQI
Most & Least Polluted Years Over the Last 1 Years
Greater Sudbury's annual 2025 AQI (33) shows an average percentage change of NaN% (improved AQI) compared to previous years: .