Barrie, Ontario, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Barrie, Ontario, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (19th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 18 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 19th Aug - 20th Aug 2025
Barrie, Ontario, Canada
6 AM19th Aug 2025
8 PM
5 AM20th Aug 2025
20AQI
16AQI
19AQI
17AQI
In the last 24 hours,
Barrie's AQI reached its highest point of 20 at 3 PM during the Day, while the lowest point, 16, was recorded at 9 AM during the Day between 19th Aug and 20th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Barrie, Ontario, Canada
--°C/°C
18°C12/26°C
21°C13/30°C
25°C16/36°C
23°C17/29°C
23°C17/29°C
23°C19/28°C
24°C15/34°C
22°C17/31°C
21°C17/27°C
20°C15/24°C
18°C13/23°C
19°C10/28°C
21°C12/30°C
21°C13/29°C
23°C17/31°C
23°C18/29°C
24°C19/31°C
23°C16/32°C
24°C18/30°C
26°C18/34°C
26°C19/34°C
26°C20/33°C
23°C18/28°C
22°C17/28°C
24°C16/32°C
25°C16/31°C
21°C15/26°C
17°C10/23°C
17°C14/20°C
19°C17/23°C
56AQI
55AQI
58AQI
55AQI
2025 Days Vs Air Quality
Barrie, Ontario, Canada
76%
111
23%
33
1%
2
Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)
Under WHO’s Safe Air Quality Limits: 76%
Health Risk Level:
Low
In 2025, 76% of 233 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
Barrie, Ontario, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI
20AQI
16AQI
18AQI
22AQI
24AQI
18AQI
24AQI
18AQI
24AQI
17AQI
25AQI
15AQI
20AQI
37AQI
32AQI
31AQI
34AQI
34AQI
21AQI
13AQI
16AQI
38AQI
40AQI
17AQI
26AQI
15AQI
21AQI
42AQI
41AQI
21AQI
16AQI
28AQI
35AQI
17AQI
27AQI
28AQI
16AQI
18AQI
23AQI
24AQI
27AQI
18AQI
24AQI
23AQI
21AQI
29AQI
41AQI
29AQI
30AQI
35AQI
34AQI
16AQI
15AQI
15AQI
21AQI
14AQI
11AQI
15AQI
16AQI
22AQI
31AQI
29AQI
22AQI
31AQI
27AQI
16AQI
21AQI
41AQI
63AQI
51AQI
65AQI
67AQI
78AQI
69AQI
56AQI
62AQI
66AQI
41AQI
33AQI
38AQI
46AQI
43AQI
37AQI
33AQI
37AQI
51AQI
53AQI
53AQI
53AQI
45AQI
40AQI
35AQI
30AQI
33AQI
41AQI
38AQI
40AQI
49AQI
34AQI
45AQI
54AQI
47AQI
35AQI
45AQI
47AQI
51AQI
49AQI
48AQI
53AQI
60AQI
69AQI
49AQI
29AQI
36AQI
29AQI
40AQI
22AQI
28AQI
38AQI
35AQI
54AQI
48AQI
52AQI
45AQI
55AQI
85AQI
44AQI
50AQI
118AQI
128AQI
94AQI
84AQI
83AQI
87AQI
69AQI
62AQI
61AQI
52AQI
41AQI
64AQI
61AQI
59AQI
36AQI
15AQI
18AQI
20AQI
25AQI
24AQI
47AQI
45AQI
65AQI
No. of days
202539AQI
Highest AQI recorded in
August65AQI
Lowest AQI recorded in
March20AQI
Most & Least Polluted Years Over the Last 1 Years
Barrie's annual 2025 AQI (39) shows an average percentage change of NaN% (improved AQI) compared to previous years: .