Sint Niklaas, Flanders, Belgium Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Sint Niklaas, Flanders, Belgium
AQI Trends: Highest and Lowest
Same Day Analysis (2nd July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 38 of Good air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jul - 4th Jul 2025
Sint Niklaas, Flanders, Belgium
5 AM3rd Jul 2025
10 PM
4 AM4th Jul 2025
AQI
AQI
25AQI
19AQI
In the last 24 hours,
Sint Niklaas's AQI reached its highest point of 25 at 12 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 3rd Jul and 4th Jul 2025.
Day & Night AQI Trend : Jun - Jul 2025
Sint Niklaas, Flanders, Belgium
16°C13/20°C
15°C12/18°C
16°C12/21°C
14°C12/18°C
14°C11/17°C
15°C10/20°C
15°C11/19°C
17°C10/23°C
22°C12/30°C
24°C18/31°C
22°C17/26°C
18°C14/22°C
18°C13/24°C
20°C13/27°C
20°C14/26°C
21°C14/27°C
21°C14/29°C
25°C15/32°C
23°C17/28°C
19°C15/22°C
18°C11/24°C
22°C15/30°C
21°C17/26°C
19°C14/25°C
23°C17/28°C
22°C17/28°C
26°C17/34°C
29°C22/38°C
24°C17/35°C
0°C0/0°C
0°C0/0°C
32AQI
31AQI
30AQI
30AQI
2025 Days Vs Air Quality
Sint Niklaas, Flanders, Belgium
63%
115
32%
59
5%
9
Total number of days with different AQI categories in last 184 days in 2025 (181 days remaining)
Under WHO’s Safe Air Quality Limits: 63%
Health Risk Level:
Moderate
In 2025, 63% of 184 days were within WHO’s safe air quality limits, and 37% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Sint Niklaas, Flanders, Belgium
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
23AQI
27AQI
58AQI
33AQI
21AQI
20AQI
32AQI
28AQI
57AQI
99AQI
65AQI
69AQI
86AQI
93AQI
62AQI
81AQI
74AQI
93AQI
112AQI
85AQI
78AQI
59AQI
27AQI
32AQI
28AQI
17AQI
20AQI
26AQI
33AQI
51AQI
60AQI
68AQI
104AQI
70AQI
76AQI
65AQI
55AQI
67AQI
64AQI
138AQI
92AQI
86AQI
106AQI
118AQI
88AQI
61AQI
70AQI
78AQI
81AQI
80AQI
53AQI
48AQI
43AQI
23AQI
50AQI
36AQI
29AQI
37AQI
42AQI
65AQI
92AQI
129AQI
107AQI
84AQI
59AQI
71AQI
89AQI
125AQI
83AQI
32AQI
40AQI
32AQI
42AQI
44AQI
38AQI
34AQI
48AQI
57AQI
62AQI
38AQI
24AQI
84AQI
121AQI
57AQI
66AQI
75AQI
39AQI
36AQI
36AQI
39AQI
42AQI
56AQI
62AQI
46AQI
20AQI
34AQI
48AQI
55AQI
47AQI
62AQI
74AQI
49AQI
28AQI
39AQI
24AQI
39AQI
49AQI
44AQI
48AQI
45AQI
57AQI
39AQI
63AQI
51AQI
65AQI
46AQI
57AQI
52AQI
49AQI
48AQI
70AQI
50AQI
22AQI
23AQI
23AQI
32AQI
27AQI
25AQI
26AQI
26AQI
23AQI
40AQI
42AQI
44AQI
36AQI
36AQI
38AQI
35AQI
30AQI
42AQI
30AQI
20AQI
29AQI
20AQI
30AQI
20AQI
22AQI
27AQI
25AQI
41AQI
39AQI
28AQI
27AQI
22AQI
18AQI
18AQI
14AQI
18AQI
44AQI
57AQI
42AQI
47AQI
55AQI
49AQI
35AQI
35AQI
36AQI
35AQI
36AQI
34AQI
32AQI
29AQI
23AQI
24AQI
23AQI
27AQI
28AQI
20AQI
18AQI
25AQI
31AQI
38AQI
52AQI
70AQI
63AQI
48AQI
32AQI
31AQI
35AQI
No. of days
202549AQI
Highest AQI recorded in
February70AQI
Lowest AQI recorded in
June31AQI
202438AQI
Highest AQI recorded in
January46AQI
Lowest AQI recorded in
April23AQI
202337AQI
Highest AQI recorded in
May47AQI
Lowest AQI recorded in
July26AQI
202244AQI
Highest AQI recorded in
March73AQI
Lowest AQI recorded in
November25AQI
202150AQI
Highest AQI recorded in
March65AQI
Lowest AQI recorded in
August37AQI
202044AQI
Highest AQI recorded in
November60AQI
Lowest AQI recorded in
July28AQI
Most & Least Polluted Years Over the Last 6 Years
Sint Niklaas's annual 2025 AQI (49) shows an average percentage change of 16.2% (worsened AQI) compared to previous years: 2020 (44), 2021 (50), 2022 (44), 2023 (37), 2024 (38).