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!
October Air Quality Analysis
Perth, Western Australia, Australia
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 18 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Day & Night AQI Trend: 2nd Oct - 3rd Oct 2026
Perth, Western Australia, Australia
6 AM2nd Oct 2026
6 PM
5 AM3rd Oct 2026
32AQI
14AQI
17AQI
14AQI
In the last 24 hours,
Perth's AQI reached its highest point of 32 at 1 PM during the Day, while the lowest point, 14, was recorded at 8 PM during the Night between 2nd Oct and 3rd Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Perth, Western Australia, Australia
15°C14/17°C
14°C12/18°C
14°C11/18°C
15°C10/21°C
14°C11/19°C
15°C10/20°C
16°C11/21°C
17°C12/24°C
16°C13/19°C
15°C11/20°C
17°C13/23°C
18°C13/24°C
22°C17/28°C
22°C17/29°C
19°C13/28°C
15°C14/18°C
16°C13/19°C
17°C13/23°C
16°C12/21°C
16°C12/20°C
15°C12/21°C
15°C12/21°C
12°C11/14°C
15°C11/19°C
16°C13/21°C
14°C11/18°C
14°C11/17°C
15°C12/19°C
16°C10/24°C
17°C11/24°C
22AQI
17AQI
19AQI
17AQI
2026 Days Vs Air Quality
Perth, Western Australia, Australia
99%
270
1%
3
Total number of days with different AQI categories in last 276 days in 2026 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2026, 99% 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
Perth, Western Australia, Australia
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI (US)
26AQI (US)
30AQI (US)
23AQI (US)
30AQI (US)
25AQI (US)
25AQI (US)
18AQI (US)
16AQI (US)
18AQI (US)
18AQI (US)
22AQI (US)
16AQI (US)
12AQI (US)
17AQI (US)
24AQI (US)
16AQI (US)
21AQI (US)
50AQI (US)
16AQI (US)
24AQI (US)
29AQI (US)
43AQI (US)
34AQI (US)
38AQI (US)
40AQI (US)
24AQI (US)
20AQI (US)
28AQI (US)
43AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
46AQI (US)
46AQI (US)
40AQI (US)
28AQI (US)
36AQI (US)
26AQI (US)
32AQI (US)
46AQI (US)
42AQI (US)
38AQI (US)
50AQI (US)
44AQI (US)
34AQI (US)
29AQI (US)
32AQI (US)
34AQI (US)
22AQI (US)
32AQI (US)
36AQI (US)
30AQI (US)
10AQI (US)
11AQI (US)
30AQI (US)
22AQI (US)
42AQI (US)
46AQI (US)
27AQI (US)
44AQI (US)
42AQI (US)
46AQI (US)
44AQI (US)
35AQI (US)
38AQI (US)
46AQI (US)
47AQI (US)
38AQI (US)
40AQI (US)
42AQI (US)
43AQI (US)
44AQI (US)
44AQI (US)
47AQI (US)
36AQI (US)
36AQI (US)
36AQI (US)
30AQI (US)
40AQI (US)
14AQI (US)
19AQI (US)
35AQI (US)
46AQI (US)
30AQI (US)
28AQI (US)
20AQI (US)
44AQI (US)
36AQI (US)
46AQI (US)
17AQI (US)
26AQI (US)
32AQI (US)
32AQI (US)
38AQI (US)
32AQI (US)
32AQI (US)
17AQI (US)
18AQI (US)
29AQI (US)
20AQI (US)
14AQI (US)
26AQI (US)
11AQI (US)
12AQI (US)
36AQI (US)
14AQI (US)
24AQI (US)
28AQI (US)
11AQI (US)
41AQI (US)
44AQI (US)
44AQI (US)
45AQI (US)
42AQI (US)
28AQI (US)
26AQI (US)
40AQI (US)
30AQI (US)
34AQI (US)
26AQI (US)
19AQI (US)
18AQI (US)
28AQI (US)
11AQI (US)
7AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
23AQI (US)
27AQI (US)
28AQI (US)
72AQI (US)
55AQI (US)
47AQI (US)
44AQI (US)
57AQI (US)
48AQI (US)
46AQI (US)
43AQI (US)
48AQI (US)
36AQI (US)
30AQI (US)
17AQI (US)
22AQI (US)
22AQI (US)
22AQI (US)
22AQI (US)
20AQI (US)
28AQI (US)
24AQI (US)
24AQI (US)
23AQI (US)
25AQI (US)
35AQI (US)
11AQI (US)
14AQI (US)
20AQI (US)
22AQI (US)
18AQI (US)
23AQI (US)
15AQI (US)
20AQI (US)
23AQI (US)
14AQI (US)
24AQI (US)
24AQI (US)
19AQI (US)
20AQI (US)
19AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
24AQI (US)
38AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
21AQI (US)
18AQI (US)
18AQI (US)
14AQI (US)
14AQI (US)
14AQI (US)
15AQI (US)
20AQI (US)
15AQI (US)
14AQI (US)
22AQI (US)
17AQI (US)
18AQI (US)
22AQI (US)
14AQI (US)
14AQI (US)
20AQI (US)
20AQI (US)
24AQI (US)
26AQI (US)
18AQI (US)
17AQI (US)
14AQI (US)
16AQI (US)
20AQI (US)
20AQI (US)
16AQI (US)
12AQI (US)
13AQI (US)
18AQI (US)
17AQI (US)
34AQI (US)
41AQI (US)
17AQI (US)
13AQI (US)
16AQI (US)
18AQI (US)
16AQI (US)
19AQI (US)
16AQI (US)
18AQI (US)
26AQI (US)
32AQI (US)
25AQI (US)
17AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
15AQI (US)
17AQI (US)
16AQI (US)
16AQI (US)
12AQI (US)
14AQI (US)
18AQI (US)
14AQI (US)
16AQI (US)
18AQI (US)
13AQI (US)
17AQI (US)
19AQI (US)
14AQI (US)
19AQI (US)
14AQI (US)
21AQI (US)
20AQI (US)
18AQI (US)
13AQI (US)
18AQI (US)
16AQI (US)
16AQI (US)
15AQI (US)
26AQI (US)
30AQI (US)
15AQI (US)
18AQI (US)
18AQI (US)
22AQI (US)
18AQI (US)
26AQI (US)
19AQI (US)
18AQI (US)
23AQI (US)
16AQI (US)
16AQI (US)
16AQI (US)
12AQI (US)
20AQI (US)
13AQI (US)
16AQI (US)
16AQI (US)
19AQI (US)
20AQI (US)
18AQI (US)
26AQI (US)
34AQI (US)
38AQI (US)
28AQI (US)
32AQI (US)
22AQI (US)
18AQI (US)
19AQI (US)
18AQI (US)
19AQI (US)
No. of days
202626AQI (US)
Highest AQI (US) recorded in
March38AQI (US)
Lowest AQI (US) recorded in
September18AQI (US)
202527AQI (US)
Highest AQI (US) recorded in
October34AQI (US)
Lowest AQI (US) recorded in
April19AQI (US)
202418AQI (US)
Highest AQI (US) recorded in
December27AQI (US)
Lowest AQI (US) recorded in
May15AQI (US)
202316AQI (US)
Highest AQI (US) recorded in
October18AQI (US)
Lowest AQI (US) recorded in
April13AQI (US)
202214AQI (US)
Highest AQI (US) recorded in
February18AQI (US)
Lowest AQI (US) recorded in
November13AQI (US)
202127AQI (US)
Highest AQI (US) recorded in
June42AQI (US)
Lowest AQI (US) recorded in
December14AQI (US)
202030AQI (US)
Highest AQI (US) recorded in
May52AQI (US)
Lowest AQI (US) recorded in
September19AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Perth's annual 2026 AQI (US) (26) shows an average percentage change of 28.6% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (27), 2022 (14), 2023 (16), 2024 (18), 2025 (27).