Perth, Western Australia, Australia 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
Perth, Western Australia, Australia
AQI Trends: Highest and Lowest
Same Day Analysis (12th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 25 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Perth, Western Australia, Australia
7 AM12th Aug 2025
5 PM
6 AM13th Aug 2025
37AQI
21AQI
40AQI
22AQI
In the last 24 hours,
Perth's AQI reached its highest point of 40 at 5 AM during the Night, while the lowest point, 21, was recorded at 12 PM during the Day between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Perth, Western Australia, Australia
13°C11/16°C
13°C9/15°C
14°C11/16°C
13°C9/16°C
14°C10/17°C
12°C8/16°C
13°C8/17°C
10°C7/13°C
13°C10/17°C
12°C10/13°C
10°C7/13°C
10°C5/14°C
11°C7/15°C
10°C8/13°C
9°C7/12°C
11°C6/15°C
12°C8/17°C
13°C9/18°C
13°C10/18°C
14°C12/15°C
12°C11/13°C
13°C11/15°C
13°C11/16°C
13°C9/18°C
14°C9/19°C
16°C14/20°C
15°C14/18°C
14°C12/16°C
14°C11/18°C
14°C9/21°C
--°C/°C
28AQI
22AQI
29AQI
22AQI
2025 Days Vs Air Quality
Perth, Western Australia, Australia
96%
216
4%
8
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 225 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
Perth, Western Australia, Australia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
30AQI
29AQI
26AQI
26AQI
26AQI
25AQI
23AQI
26AQI
22AQI
22AQI
21AQI
23AQI
24AQI
23AQI
25AQI
23AQI
23AQI
27AQI
27AQI
30AQI
29AQI
32AQI
26AQI
46AQI
59AQI
55AQI
41AQI
35AQI
35AQI
29AQI
43AQI
66AQI
65AQI
53AQI
37AQI
38AQI
28AQI
32AQI
23AQI
23AQI
23AQI
24AQI
25AQI
25AQI
28AQI
25AQI
29AQI
25AQI
27AQI
27AQI
23AQI
23AQI
22AQI
30AQI
22AQI
28AQI
22AQI
24AQI
25AQI
23AQI
22AQI
22AQI
22AQI
24AQI
22AQI
21AQI
23AQI
23AQI
27AQI
23AQI
23AQI
18AQI
18AQI
15AQI
16AQI
17AQI
19AQI
17AQI
21AQI
69AQI
71AQI
54AQI
37AQI
37AQI
33AQI
40AQI
24AQI
33AQI
43AQI
31AQI
29AQI
23AQI
24AQI
24AQI
17AQI
21AQI
18AQI
16AQI
16AQI
19AQI
20AQI
19AQI
20AQI
21AQI
22AQI
22AQI
21AQI
20AQI
17AQI
15AQI
15AQI
16AQI
15AQI
14AQI
16AQI
14AQI
16AQI
18AQI
18AQI
20AQI
32AQI
24AQI
27AQI
35AQI
32AQI
32AQI
36AQI
29AQI
30AQI
25AQI
28AQI
27AQI
30AQI
33AQI
33AQI
38AQI
33AQI
33AQI
27AQI
29AQI
29AQI
24AQI
26AQI
24AQI
30AQI
30AQI
26AQI
25AQI
25AQI
25AQI
27AQI
27AQI
25AQI
25AQI
26AQI
27AQI
26AQI
24AQI
30AQI
29AQI
23AQI
28AQI
24AQI
25AQI
24AQI
24AQI
23AQI
20AQI
23AQI
27AQI
22AQI
10AQI
22AQI
24AQI
23AQI
26AQI
25AQI
26AQI
26AQI
24AQI
21AQI
23AQI
22AQI
22AQI
22AQI
23AQI
22AQI
21AQI
22AQI
22AQI
24AQI
23AQI
22AQI
24AQI
23AQI
21AQI
23AQI
23AQI
24AQI
21AQI
23AQI
21AQI
19AQI
19AQI
22AQI
23AQI
29AQI
43AQI
34AQI
33AQI
32AQI
35AQI
32AQI
28AQI
27AQI
25AQI
26AQI
24AQI
23AQI
22AQI
21AQI
22AQI
25AQI
30AQI
31AQI
28AQI
19AQI
29AQI
25AQI
24AQI
26AQI
No. of days
202526AQI
Highest AQI recorded in
February31AQI
Lowest AQI recorded in
April19AQI
202418AQI
Highest AQI recorded in
December27AQI
Lowest AQI recorded in
April15AQI
202316AQI
Highest AQI recorded in
October18AQI
Lowest AQI recorded in
April13AQI
202214AQI
Highest AQI recorded in
February18AQI
Lowest AQI recorded in
November13AQI
202127AQI
Highest AQI recorded in
June42AQI
Lowest AQI recorded in
December14AQI
202030AQI
Highest AQI recorded in
May52AQI
Lowest AQI recorded in
March19AQI
Most & Least Polluted Years Over the Last 6 Years
Perth's annual 2025 AQI (26) shows an average percentage change of 36.7% (worsened AQI) compared to previous years: 2020 (30), 2021 (27), 2022 (14), 2023 (16), 2024 (18).