Ashton, Canterbury, New Zealand 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
Ashton, Canterbury, New Zealand
AQI Trends: Highest and Lowest
Same Day Analysis (27th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 38 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Sep - 28th Sep 2025
Ashton, Canterbury, New Zealand
6 AM27th Sep 2025
6 PM
5 AM28th Sep 2025
22AQI
17AQI
36AQI
15AQI
In the last 24 hours,
Ashton's AQI reached its highest point of 36 at 11 PM during the Night, while the lowest point, undefined, was recorded at 2 AM during the Night between 27th Sep and 28th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ashton, Canterbury, New Zealand
9°C5/14°C
8°C5/15°C
5°C2/6°C
8°C2/16°C
7°C3/13°C
7°C4/13°C
9°C4/16°C
10°C6/15°C
6°C4/10°C
8°C5/11°C
7°C3/12°C
8°C3/15°C
8°C4/14°C
6°C1/12°C
7°C3/15°C
8°C3/14°C
7°C4/10°C
10°C4/17°C
11°C7/16°C
14°C11/20°C
11°C6/16°C
6°C2/11°C
7°C0/15°C
11°C7/15°C
10°C6/17°C
9°C6/13°C
10°C7/15°C
7°C3/11°C
7°C3/14°C
8°C2/14°C
--°C/°C
21AQI
17AQI
27AQI
21AQI
2025 Days Vs Air Quality
Ashton, Canterbury, New Zealand
84%
227
16%
43
Total number of days with different AQI categories in last 271 days in 2025 (94 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 271 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
Ashton, Canterbury, New Zealand
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI
21AQI
23AQI
21AQI
25AQI
21AQI
24AQI
25AQI
22AQI
21AQI
20AQI
22AQI
20AQI
23AQI
20AQI
20AQI
20AQI
20AQI
20AQI
20AQI
22AQI
23AQI
27AQI
22AQI
25AQI
24AQI
24AQI
23AQI
28AQI
28AQI
29AQI
27AQI
25AQI
27AQI
29AQI
30AQI
28AQI
29AQI
27AQI
28AQI
25AQI
23AQI
22AQI
24AQI
25AQI
23AQI
27AQI
30AQI
24AQI
24AQI
21AQI
21AQI
21AQI
20AQI
29AQI
24AQI
28AQI
23AQI
25AQI
38AQI
33AQI
31AQI
27AQI
23AQI
26AQI
36AQI
22AQI
28AQI
23AQI
32AQI
22AQI
24AQI
21AQI
22AQI
27AQI
19AQI
22AQI
18AQI
23AQI
23AQI
28AQI
27AQI
23AQI
24AQI
24AQI
27AQI
19AQI
24AQI
23AQI
30AQI
29AQI
25AQI
26AQI
24AQI
26AQI
27AQI
22AQI
21AQI
23AQI
24AQI
24AQI
28AQI
32AQI
30AQI
29AQI
33AQI
33AQI
29AQI
38AQI
25AQI
30AQI
27AQI
39AQI
38AQI
41AQI
49AQI
38AQI
40AQI
38AQI
32AQI
25AQI
29AQI
32AQI
41AQI
41AQI
48AQI
39AQI
32AQI
32AQI
31AQI
36AQI
39AQI
38AQI
43AQI
37AQI
45AQI
37AQI
36AQI
42AQI
45AQI
42AQI
50AQI
51AQI
61AQI
45AQI
55AQI
53AQI
49AQI
45AQI
47AQI
52AQI
59AQI
50AQI
64AQI
46AQI
48AQI
38AQI
34AQI
25AQI
36AQI
53AQI
55AQI
48AQI
46AQI
63AQI
59AQI
69AQI
74AQI
75AQI
70AQI
70AQI
74AQI
85AQI
85AQI
95AQI
78AQI
75AQI
70AQI
68AQI
69AQI
67AQI
76AQI
69AQI
61AQI
63AQI
62AQI
62AQI
65AQI
62AQI
64AQI
69AQI
63AQI
58AQI
60AQI
60AQI
50AQI
52AQI
52AQI
49AQI
50AQI
42AQI
39AQI
48AQI
42AQI
39AQI
40AQI
54AQI
48AQI
47AQI
46AQI
36AQI
37AQI
28AQI
33AQI
35AQI
36AQI
32AQI
35AQI
34AQI
28AQI
30AQI
34AQI
28AQI
29AQI
30AQI
28AQI
25AQI
22AQI
26AQI
25AQI
24AQI
24AQI
23AQI
25AQI
24AQI
26AQI
27AQI
26AQI
23AQI
19AQI
18AQI
22AQI
18AQI
23AQI
20AQI
18AQI
19AQI
25AQI
31AQI
29AQI
24AQI
22AQI
24AQI
22AQI
23AQI
20AQI
21AQI
21AQI
28AQI
21AQI
19AQI
21AQI
18AQI
17AQI
16AQI
19AQI
25AQI
25AQI
16AQI
38AQI
23AQI
25AQI
25AQI
31AQI
42AQI
62AQI
54AQI
27AQI
22AQI
No. of days
202535AQI
Highest AQI recorded in
June62AQI
Lowest AQI recorded in
September22AQI
202431AQI
Highest AQI recorded in
June53AQI
Lowest AQI recorded in
January17AQI
202329AQI
Highest AQI recorded in
June49AQI
Lowest AQI recorded in
November19AQI
202230AQI
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
November20AQI
202130AQI
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
December15AQI
Most & Least Polluted Years Over the Last 5 Years
Ashton's annual 2025 AQI (35) shows an average percentage change of 16.2% (worsened AQI) compared to previous years: 2021 (30), 2022 (30), 2023 (29), 2024 (31).