Klosterneuburg, Niederosterreich, Austria 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
Klosterneuburg, Niederosterreich, Austria
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 25 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Klosterneuburg, Niederosterreich, Austria
6 AM21st Sep 2025
7 PM
5 AM22nd Sep 2025
29AQI
22AQI
26AQI
20AQI
In the last 24 hours,
Klosterneuburg's AQI reached its highest point of 29 at 10 AM during the Day, while the lowest point, 20, was recorded at 3 AM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Klosterneuburg, Niederosterreich, Austria
17°C13/21°C
17°C11/22°C
19°C15/24°C
21°C15/27°C
23°C16/30°C
25°C19/33°C
23°C20/27°C
21°C18/25°C
18°C15/21°C
21°C15/27°C
19°C16/23°C
20°C15/26°C
22°C16/29°C
19°C15/22°C
18°C13/24°C
19°C13/25°C
19°C14/25°C
20°C15/26°C
18°C16/21°C
19°C15/25°C
18°C16/19°C
19°C15/24°C
16°C15/19°C
19°C13/26°C
17°C14/21°C
16°C12/21°C
18°C13/25°C
21°C15/28°C
23°C16/30°C
23°C18/30°C
--°C/°C
28AQI
24AQI
26AQI
24AQI
2025 Days Vs Air Quality
Klosterneuburg, Niederosterreich, Austria
72%
189
28%
74
0.3%
1
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 265 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
Klosterneuburg, Niederosterreich, Austria
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
89AQI
80AQI
41AQI
44AQI
62AQI
73AQI
51AQI
35AQI
59AQI
24AQI
35AQI
32AQI
30AQI
62AQI
65AQI
64AQI
68AQI
64AQI
69AQI
62AQI
67AQI
62AQI
62AQI
68AQI
62AQI
59AQI
62AQI
38AQI
36AQI
63AQI
50AQI
56AQI
63AQI
66AQI
82AQI
76AQI
60AQI
85AQI
74AQI
73AQI
73AQI
68AQI
76AQI
79AQI
70AQI
72AQI
53AQI
77AQI
75AQI
77AQI
77AQI
72AQI
82AQI
98AQI
106AQI
96AQI
65AQI
56AQI
46AQI
62AQI
58AQI
60AQI
67AQI
81AQI
72AQI
64AQI
69AQI
86AQI
62AQI
56AQI
46AQI
32AQI
50AQI
53AQI
56AQI
40AQI
36AQI
53AQI
57AQI
68AQI
65AQI
42AQI
45AQI
62AQI
57AQI
51AQI
65AQI
51AQI
56AQI
23AQI
48AQI
64AQI
54AQI
43AQI
41AQI
21AQI
19AQI
25AQI
33AQI
36AQI
42AQI
41AQI
48AQI
50AQI
43AQI
36AQI
42AQI
32AQI
21AQI
30AQI
28AQI
22AQI
24AQI
26AQI
22AQI
37AQI
31AQI
38AQI
43AQI
40AQI
38AQI
38AQI
43AQI
32AQI
30AQI
41AQI
43AQI
36AQI
30AQI
29AQI
27AQI
30AQI
31AQI
33AQI
28AQI
20AQI
27AQI
18AQI
22AQI
28AQI
39AQI
31AQI
23AQI
23AQI
23AQI
23AQI
24AQI
23AQI
15AQI
23AQI
25AQI
28AQI
29AQI
26AQI
33AQI
21AQI
24AQI
20AQI
25AQI
25AQI
36AQI
49AQI
39AQI
36AQI
31AQI
37AQI
33AQI
30AQI
35AQI
44AQI
34AQI
30AQI
28AQI
37AQI
34AQI
30AQI
32AQI
29AQI
26AQI
24AQI
24AQI
24AQI
27AQI
30AQI
34AQI
37AQI
39AQI
34AQI
24AQI
24AQI
22AQI
22AQI
23AQI
26AQI
27AQI
25AQI
30AQI
23AQI
25AQI
26AQI
31AQI
37AQI
20AQI
18AQI
24AQI
30AQI
39AQI
40AQI
28AQI
27AQI
23AQI
25AQI
23AQI
22AQI
22AQI
23AQI
29AQI
23AQI
24AQI
29AQI
40AQI
48AQI
39AQI
34AQI
46AQI
51AQI
46AQI
52AQI
50AQI
31AQI
26AQI
34AQI
43AQI
40AQI
25AQI
19AQI
20AQI
27AQI
39AQI
46AQI
39AQI
24AQI
20AQI
27AQI
25AQI
22AQI
22AQI
21AQI
19AQI
23AQI
32AQI
32AQI
34AQI
23AQI
20AQI
23AQI
30AQI
19AQI
20AQI
19AQI
20AQI
26AQI
30AQI
25AQI
56AQI
73AQI
56AQI
36AQI
29AQI
31AQI
28AQI
33AQI
24AQI
No. of days
202541AQI
Highest AQI recorded in
February73AQI
Lowest AQI recorded in
September24AQI
202439AQI
Highest AQI recorded in
November61AQI
Lowest AQI recorded in
July25AQI
202337AQI
Highest AQI recorded in
February49AQI
Lowest AQI recorded in
July24AQI
202241AQI
Highest AQI recorded in
March71AQI
Lowest AQI recorded in
July21AQI
202117AQI
Highest AQI recorded in
February31AQI
Lowest AQI recorded in
August9AQI
202016AQI
Highest AQI recorded in
March27AQI
Lowest AQI recorded in
June10AQI
Most & Least Polluted Years Over the Last 6 Years
Klosterneuburg's annual 2025 AQI (41) shows an average percentage change of 63.3% (worsened AQI) compared to previous years: 2020 (16), 2021 (17), 2022 (41), 2023 (37), 2024 (39).