Aalborg, Nordjylland, Denmark 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
Aalborg, Nordjylland, Denmark
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Aalborg, Nordjylland, Denmark
7 AM4th Oct 2025
7 PM
6 AM5th Oct 2025
51AQI
19AQI
45AQI
15AQI
In the last 24 hours,
Aalborg's AQI reached its highest point of 51 at 7 AM during the Day, while the lowest point, 15, was recorded at 6 AM during the Night between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Aalborg, Nordjylland, Denmark
16°C13/19°C
15°C11/20°C
15°C10/21°C
16°C13/21°C
18°C13/22°C
18°C15/22°C
16°C12/21°C
13°C11/17°C
14°C10/19°C
13°C10/17°C
13°C10/18°C
14°C11/17°C
14°C11/17°C
16°C12/19°C
17°C14/21°C
18°C14/24°C
15°C11/17°C
12°C10/14°C
11°C7/16°C
10°C6/16°C
11°C7/16°C
12°C9/16°C
13°C10/16°C
13°C10/17°C
13°C11/16°C
11°C8/13°C
10°C7/14°C
9°C6/14°C
11°C7/15°C
11°C9/14°C
--°C/°C
26AQI
23AQI
26AQI
24AQI
2025 Days Vs Air Quality
Aalborg, Nordjylland, Denmark
89%
246
11%
31
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 278 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
Aalborg, Nordjylland, Denmark
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
25AQI
22AQI
23AQI
44AQI
24AQI
22AQI
24AQI
31AQI
26AQI
22AQI
23AQI
39AQI
39AQI
42AQI
26AQI
35AQI
46AQI
49AQI
54AQI
48AQI
53AQI
41AQI
37AQI
29AQI
29AQI
26AQI
22AQI
21AQI
26AQI
30AQI
32AQI
48AQI
55AQI
71AQI
65AQI
46AQI
38AQI
42AQI
58AQI
55AQI
49AQI
53AQI
52AQI
49AQI
39AQI
34AQI
33AQI
43AQI
50AQI
56AQI
67AQI
68AQI
54AQI
42AQI
31AQI
51AQI
45AQI
41AQI
43AQI
42AQI
42AQI
44AQI
53AQI
60AQI
70AQI
73AQI
67AQI
68AQI
55AQI
45AQI
34AQI
33AQI
30AQI
30AQI
28AQI
28AQI
40AQI
55AQI
77AQI
57AQI
53AQI
53AQI
63AQI
39AQI
35AQI
58AQI
52AQI
32AQI
29AQI
26AQI
30AQI
35AQI
36AQI
27AQI
22AQI
21AQI
28AQI
34AQI
32AQI
43AQI
37AQI
46AQI
49AQI
43AQI
45AQI
50AQI
24AQI
28AQI
19AQI
25AQI
41AQI
37AQI
33AQI
26AQI
23AQI
23AQI
26AQI
31AQI
27AQI
29AQI
28AQI
21AQI
16AQI
16AQI
18AQI
17AQI
17AQI
22AQI
23AQI
20AQI
20AQI
20AQI
21AQI
21AQI
19AQI
19AQI
19AQI
18AQI
23AQI
22AQI
15AQI
14AQI
16AQI
22AQI
19AQI
19AQI
16AQI
17AQI
18AQI
17AQI
18AQI
19AQI
19AQI
23AQI
19AQI
16AQI
16AQI
16AQI
23AQI
38AQI
29AQI
26AQI
22AQI
21AQI
26AQI
23AQI
28AQI
24AQI
20AQI
19AQI
22AQI
25AQI
25AQI
19AQI
18AQI
19AQI
18AQI
19AQI
20AQI
19AQI
19AQI
20AQI
21AQI
19AQI
18AQI
20AQI
20AQI
18AQI
19AQI
18AQI
19AQI
21AQI
22AQI
24AQI
26AQI
29AQI
38AQI
37AQI
38AQI
39AQI
41AQI
35AQI
27AQI
31AQI
32AQI
36AQI
33AQI
25AQI
24AQI
21AQI
21AQI
22AQI
22AQI
21AQI
22AQI
25AQI
27AQI
22AQI
24AQI
21AQI
22AQI
24AQI
27AQI
36AQI
39AQI
47AQI
29AQI
19AQI
19AQI
23AQI
18AQI
17AQI
17AQI
16AQI
17AQI
20AQI
20AQI
23AQI
31AQI
33AQI
29AQI
27AQI
22AQI
23AQI
21AQI
17AQI
24AQI
20AQI
23AQI
22AQI
31AQI
38AQI
33AQI
19AQI
17AQI
17AQI
16AQI
17AQI
17AQI
18AQI
19AQI
25AQI
25AQI
16AQI
14AQI
15AQI
16AQI
14AQI
13AQI
16AQI
23AQI
22AQI
38AQI
54AQI
55AQI
50AQI
33AQI
49AQI
48AQI
32AQI
19AQI
22AQI
26AQI
24AQI
20AQI
49AQI
No. of days
202531AQI
Highest AQI recorded in
October49AQI
Lowest AQI recorded in
May19AQI
202425AQI
Highest AQI recorded in
October47AQI
Lowest AQI recorded in
April15AQI
202315AQI
Highest AQI recorded in
January20AQI
Lowest AQI recorded in
November11AQI
202218AQI
Highest AQI recorded in
November19AQI
Lowest AQI recorded in
October14AQI
Most & Least Polluted Years Over the Last 4 Years
Aalborg's annual 2025 AQI (31) shows an average percentage change of 64.6% (worsened AQI) compared to previous years: 2022 (18), 2023 (15), 2024 (25).