Adelaide, South Australia, Australia Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Adelaide, South Australia, Australia
AQI Trends: Highest and Lowest
Same Day Analysis (25th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 24 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 26th Sep - 27th Sep 2025
Adelaide, South Australia, Australia
6 AM26th Sep 2025
6 PM
5 AM27th Sep 2025
23AQI
18AQI
27AQI
12AQI
In the last 24 hours,
Adelaide's AQI reached its highest point of 27 at 9 PM during the Night, while the lowest point, 12, was recorded at 5 AM during the Night between 26th Sep and 27th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Adelaide, South Australia, Australia
12°C11/13°C
10°C8/11°C
11°C9/12°C
11°C8/13°C
12°C10/13°C
12°C9/16°C
12°C10/14°C
12°C9/14°C
13°C8/17°C
19°C16/22°C
17°C13/18°C
13°C11/15°C
12°C9/17°C
11°C10/13°C
11°C9/14°C
11°C10/13°C
12°C9/16°C
16°C12/19°C
17°C12/21°C
13°C12/14°C
12°C11/14°C
15°C10/20°C
14°C12/16°C
12°C11/13°C
13°C11/15°C
12°C9/15°C
12°C9/14°C
13°C12/15°C
14°C13/16°C
14°C12/18°C
--°C/°C
20AQI
17AQI
23AQI
19AQI
2025 Days Vs Air Quality
Adelaide, South Australia, Australia
99%
265
1%
3
Total number of days with different AQI categories in last 270 days in 2025 (95 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 270 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
Adelaide, South Australia, Australia
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI
31AQI
25AQI
24AQI
28AQI
23AQI
22AQI
25AQI
24AQI
30AQI
27AQI
27AQI
25AQI
26AQI
24AQI
20AQI
21AQI
22AQI
21AQI
25AQI
26AQI
23AQI
26AQI
22AQI
22AQI
21AQI
27AQI
25AQI
27AQI
24AQI
23AQI
35AQI
55AQI
40AQI
51AQI
40AQI
54AQI
42AQI
37AQI
38AQI
36AQI
31AQI
35AQI
31AQI
26AQI
30AQI
24AQI
25AQI
23AQI
22AQI
23AQI
27AQI
28AQI
27AQI
22AQI
24AQI
25AQI
24AQI
21AQI
23AQI
21AQI
25AQI
28AQI
32AQI
31AQI
38AQI
34AQI
31AQI
28AQI
32AQI
25AQI
27AQI
30AQI
31AQI
29AQI
27AQI
27AQI
27AQI
24AQI
23AQI
24AQI
24AQI
23AQI
28AQI
34AQI
30AQI
33AQI
32AQI
34AQI
31AQI
28AQI
29AQI
24AQI
24AQI
20AQI
20AQI
20AQI
20AQI
24AQI
23AQI
24AQI
25AQI
23AQI
25AQI
28AQI
25AQI
27AQI
26AQI
30AQI
22AQI
21AQI
17AQI
23AQI
21AQI
26AQI
19AQI
19AQI
18AQI
17AQI
18AQI
20AQI
21AQI
21AQI
25AQI
22AQI
22AQI
23AQI
25AQI
26AQI
26AQI
26AQI
26AQI
24AQI
23AQI
21AQI
21AQI
20AQI
19AQI
21AQI
22AQI
23AQI
25AQI
26AQI
28AQI
22AQI
37AQI
24AQI
27AQI
24AQI
29AQI
29AQI
27AQI
29AQI
23AQI
23AQI
22AQI
23AQI
23AQI
21AQI
21AQI
21AQI
20AQI
23AQI
36AQI
27AQI
25AQI
25AQI
23AQI
23AQI
24AQI
27AQI
26AQI
36AQI
31AQI
32AQI
31AQI
29AQI
32AQI
33AQI
28AQI
28AQI
28AQI
26AQI
27AQI
25AQI
26AQI
26AQI
24AQI
28AQI
27AQI
26AQI
25AQI
26AQI
22AQI
22AQI
24AQI
27AQI
25AQI
24AQI
22AQI
23AQI
23AQI
21AQI
20AQI
20AQI
20AQI
20AQI
19AQI
20AQI
20AQI
22AQI
20AQI
21AQI
24AQI
27AQI
27AQI
27AQI
25AQI
29AQI
32AQI
30AQI
30AQI
27AQI
26AQI
25AQI
23AQI
20AQI
20AQI
20AQI
18AQI
19AQI
19AQI
16AQI
18AQI
18AQI
24AQI
22AQI
21AQI
19AQI
20AQI
18AQI
21AQI
22AQI
22AQI
21AQI
20AQI
22AQI
20AQI
18AQI
22AQI
19AQI
20AQI
20AQI
19AQI
18AQI
18AQI
19AQI
21AQI
23AQI
19AQI
19AQI
17AQI
17AQI
17AQI
18AQI
20AQI
24AQI
24AQI
25AQI
32AQI
29AQI
23AQI
24AQI
26AQI
23AQI
23AQI
20AQI
No. of days
202525AQI
Highest AQI recorded in
February32AQI
Lowest AQI recorded in
September20AQI
202423AQI
Highest AQI recorded in
May30AQI
Lowest AQI recorded in
April19AQI
202321AQI
Highest AQI recorded in
May23AQI
Lowest AQI recorded in
March18AQI
202221AQI
Highest AQI recorded in
August28AQI
Lowest AQI recorded in
October17AQI
202123AQI
Highest AQI recorded in
April27AQI
Lowest AQI recorded in
October21AQI
202023AQI
Highest AQI recorded in
July26AQI
Lowest AQI recorded in
October18AQI
Most & Least Polluted Years Over the Last 6 Years
Adelaide's annual 2025 AQI (25) shows an average percentage change of 12.9% (worsened AQI) compared to previous years: 2020 (23), 2021 (23), 2022 (21), 2023 (21), 2024 (23).