Mechelen, Vlaanderen, Belgium 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
Mechelen, Vlaanderen, Belgium
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 22 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Mechelen, Vlaanderen, Belgium
7 AM22nd Sep 2025
8 PM
6 AM23rd Sep 2025
AQI
AQI
19AQI
16AQI
In the last 24 hours,
Mechelen's AQI reached its highest point of 19 at 10 AM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Mechelen, Vlaanderen, Belgium
16°C8/23°C
18°C10/27°C
22°C14/31°C
20°C16/28°C
19°C15/23°C
17°C13/22°C
18°C13/23°C
20°C17/25°C
20°C15/25°C
18°C13/24°C
20°C16/25°C
18°C14/23°C
17°C12/23°C
18°C12/25°C
22°C13/32°C
20°C17/25°C
16°C13/20°C
17°C12/23°C
16°C13/20°C
15°C11/20°C
15°C12/21°C
16°C10/21°C
18°C15/22°C
16°C13/20°C
16°C12/22°C
19°C15/26°C
21°C15/30°C
21°C19/27°C
15°C10/16°C
--°C/°C
--°C/°C
24AQI
19AQI
22AQI
19AQI
2025 Days Vs Air Quality
Mechelen, Vlaanderen, Belgium
97%
112
3%
4
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2025, 97% of 265 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
Mechelen, Vlaanderen, Belgium
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
22AQI
35AQI
30AQI
32AQI
27AQI
22AQI
20AQI
17AQI
14AQI
17AQI
31AQI
53AQI
42AQI
41AQI
55AQI
48AQI
37AQI
34AQI
31AQI
34AQI
35AQI
34AQI
32AQI
33AQI
27AQI
26AQI
21AQI
24AQI
23AQI
19AQI
18AQI
23AQI
28AQI
36AQI
27AQI
24AQI
23AQI
19AQI
19AQI
19AQI
23AQI
25AQI
24AQI
25AQI
28AQI
36AQI
27AQI
25AQI
27AQI
26AQI
32AQI
32AQI
23AQI
19AQI
18AQI
24AQI
31AQI
35AQI
29AQI
27AQI
28AQI
28AQI
24AQI
22AQI
21AQI
20AQI
24AQI
22AQI
24AQI
26AQI
28AQI
39AQI
37AQI
42AQI
47AQI
56AQI
58AQI
45AQI
49AQI
36AQI
26AQI
25AQI
29AQI
26AQI
20AQI
20AQI
19AQI
21AQI
28AQI
28AQI
31AQI
24AQI
21AQI
18AQI
19AQI
19AQI
17AQI
18AQI
19AQI
20AQI
20AQI
23AQI
22AQI
23AQI
21AQI
19AQI
17AQI
17AQI
21AQI
24AQI
22AQI
18AQI
19AQI
24AQI
22AQI
28AQI
30AQI
26AQI
30AQI
20AQI
No. of days
202527AQI
Highest AQI recorded in
August30AQI
Lowest AQI recorded in
September20AQI
Most & Least Polluted Years Over the Last 1 Years
Mechelen's annual 2025 AQI (27) shows an average percentage change of NaN% (improved AQI) compared to previous years: .