Guelph, Ontario, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Guelph, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 32 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Jun - 2nd Jun 2026
Guelph, Ontario, Canada
5 AM1st Jun 2026
8 PM
4 AM2nd Jun 2026
35AQI
26AQI
36AQI
31AQI
In the last 24 hours,
Guelph's AQI reached its highest point of 36 at 9 PM during the Night, while the lowest point, 26, was recorded at 7 AM during the Day between 1st Jun and 2nd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Guelph, Ontario, Canada
14°C5/24°C
14°C9/19°C
7°C3/10°C
6°C1/11°C
8°C1/16°C
10°C4/18°C
8°C2/12°C
7°C3/13°C
8°C0/16°C
8°C5/13°C
7°C5/11°C
12°C3/22°C
14°C6/22°C
21°C11/31°C
24°C16/32°C
22°C18/29°C
10°C4/12°C
10°C4/19°C
11°C4/18°C
10°C8/12°C
12°C7/17°C
16°C12/23°C
21°C11/30°C
20°C13/29°C
15°C10/22°C
17°C7/26°C
14°C7/19°C
15°C6/24°C
16°C8/22°C
18°C7/27°C
45AQI
35AQI
41AQI
39AQI
2026 Days Vs Air Quality
Guelph, Ontario, Canada
75%
113
23%
35
1%
2
Total number of days with different AQI categories in last 153 days in 2026 (212 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2026, 75% of 153 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
Guelph, Ontario, Canada
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
8AQI (US)
8AQI (US)
20AQI (US)
15AQI (US)
63AQI (US)
88AQI (US)
59AQI (US)
67AQI (US)
32AQI (US)
23AQI (US)
20AQI (US)
41AQI (US)
53AQI (US)
38AQI (US)
12AQI (US)
34AQI (US)
44AQI (US)
28AQI (US)
32AQI (US)
17AQI (US)
39AQI (US)
52AQI (US)
60AQI (US)
48AQI (US)
50AQI (US)
48AQI (US)
44AQI (US)
41AQI (US)
49AQI (US)
58AQI (US)
43AQI (US)
45AQI (US)
73AQI (US)
74AQI (US)
44AQI (US)
55AQI (US)
75AQI (US)
39AQI (US)
43AQI (US)
46AQI (US)
48AQI (US)
40AQI (US)
39AQI (US)
52AQI (US)
84AQI (US)
80AQI (US)
102AQI (US)
115AQI (US)
61AQI (US)
46AQI (US)
51AQI (US)
41AQI (US)
33AQI (US)
40AQI (US)
42AQI (US)
59AQI (US)
33AQI (US)
72AQI (US)
39AQI (US)
38AQI (US)
52AQI (US)
59AQI (US)
94AQI (US)
76AQI (US)
58AQI (US)
78AQI (US)
35AQI (US)
35AQI (US)
58AQI (US)
45AQI (US)
39AQI (US)
43AQI (US)
35AQI (US)
32AQI (US)
38AQI (US)
35AQI (US)
36AQI (US)
63AQI (US)
80AQI (US)
42AQI (US)
59AQI (US)
39AQI (US)
35AQI (US)
45AQI (US)
60AQI (US)
29AQI (US)
31AQI (US)
36AQI (US)
42AQI (US)
65AQI (US)
30AQI (US)
30AQI (US)
40AQI (US)
29AQI (US)
30AQI (US)
27AQI (US)
27AQI (US)
36AQI (US)
49AQI (US)
34AQI (US)
31AQI (US)
47AQI (US)
47AQI (US)
48AQI (US)
41AQI (US)
49AQI (US)
40AQI (US)
32AQI (US)
28AQI (US)
33AQI (US)
37AQI (US)
27AQI (US)
28AQI (US)
32AQI (US)
27AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
30AQI (US)
32AQI (US)
40AQI (US)
38AQI (US)
27AQI (US)
33AQI (US)
31AQI (US)
27AQI (US)
28AQI (US)
42AQI (US)
22AQI (US)
41AQI (US)
56AQI (US)
66AQI (US)
62AQI (US)
45AQI (US)
49AQI (US)
45AQI (US)
44AQI (US)
52AQI (US)
40AQI (US)
44AQI (US)
32AQI (US)
30AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
32AQI (US)
31AQI (US)
32AQI (US)
40AQI (US)
56AQI (US)
49AQI (US)
34AQI (US)
37AQI (US)
32AQI (US)
No. of days
202643AQI (US)
Highest AQI (US) recorded in
February56AQI (US)
Lowest AQI (US) recorded in
June32AQI (US)
202534AQI (US)
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
May22AQI (US)
202432AQI (US)
Highest AQI (US) recorded in
January37AQI (US)
Lowest AQI (US) recorded in
November25AQI (US)
202341AQI (US)
Highest AQI (US) recorded in
June68AQI (US)
Lowest AQI (US) recorded in
October31AQI (US)
202235AQI (US)
Highest AQI (US) recorded in
November43AQI (US)
Lowest AQI (US) recorded in
August19AQI (US)
202136AQI (US)
Highest AQI (US) recorded in
July40AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
202033AQI (US)
Highest AQI (US) recorded in
June37AQI (US)
Lowest AQI (US) recorded in
October26AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Guelph's annual 2026 AQI (US) (43) shows an average percentage change of 23.05% (worsened AQI (US)) compared to previous years: 2020 (33), 2021 (36), 2022 (35), 2023 (41), 2024 (32), 2025 (34).