Saint Louis, Grand Est, France Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Saint Louis, Grand Est, France
AQI Trends: Highest and Lowest
Same Day Analysis (11th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 46 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Aug - 12th Aug 2025
Saint Louis, Grand Est, France
6 AM11th Aug 2025
9 PM
5 AM12th Aug 2025
58AQI
48AQI
57AQI
52AQI
In the last 24 hours,
Saint Louis's AQI reached its highest point of 58 at 11 AM during the Day, while the lowest point, 48, was recorded at 7 PM during the Day between 11th Aug and 12th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Saint Louis, Grand Est, France
22°C14/31°C
21°C15/27°C
20°C15/26°C
18°C15/23°C
19°C13/26°C
21°C13/29°C
20°C16/30°C
21°C15/31°C
19°C16/25°C
19°C14/24°C
19°C11/26°C
17°C14/23°C
17°C12/23°C
17°C12/24°C
16°C13/21°C
14°C12/18°C
16°C10/22°C
17°C11/22°C
18°C12/24°C
18°C14/23°C
15°C11/19°C
15°C10/21°C
18°C12/25°C
19°C13/26°C
16°C10/22°C
20°C11/28°C
23°C15/31°C
25°C16/34°C
22°C16/28°C
21°C14/29°C
--°C/°C
39AQI
39AQI
39AQI
39AQI
2025 Days Vs Air Quality
Saint Louis, Grand Est, France
74%
166
26%
57
Total number of days with different AQI categories in last 224 days in 2025 (141 days remaining)
Under WHO’s Safe Air Quality Limits: 74%
Health Risk Level:
Low
In 2025, 74% of 224 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
Saint Louis, Grand Est, France
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
80AQI
49AQI
35AQI
55AQI
43AQI
27AQI
22AQI
33AQI
19AQI
27AQI
56AQI
65AQI
54AQI
67AQI
88AQI
65AQI
70AQI
65AQI
77AQI
100AQI
75AQI
62AQI
42AQI
33AQI
38AQI
24AQI
22AQI
19AQI
22AQI
40AQI
29AQI
53AQI
55AQI
60AQI
67AQI
86AQI
72AQI
62AQI
90AQI
72AQI
91AQI
81AQI
44AQI
42AQI
70AQI
69AQI
81AQI
69AQI
68AQI
78AQI
83AQI
71AQI
57AQI
40AQI
49AQI
39AQI
23AQI
25AQI
31AQI
49AQI
47AQI
57AQI
74AQI
75AQI
66AQI
60AQI
66AQI
82AQI
61AQI
43AQI
49AQI
55AQI
48AQI
64AQI
61AQI
60AQI
41AQI
54AQI
49AQI
55AQI
44AQI
23AQI
28AQI
35AQI
69AQI
41AQI
39AQI
62AQI
54AQI
28AQI
25AQI
31AQI
41AQI
44AQI
43AQI
26AQI
21AQI
33AQI
33AQI
35AQI
50AQI
41AQI
30AQI
27AQI
24AQI
19AQI
18AQI
19AQI
30AQI
25AQI
19AQI
17AQI
23AQI
18AQI
24AQI
41AQI
44AQI
34AQI
35AQI
43AQI
44AQI
40AQI
37AQI
34AQI
25AQI
24AQI
29AQI
39AQI
42AQI
36AQI
35AQI
23AQI
24AQI
40AQI
44AQI
27AQI
35AQI
42AQI
38AQI
34AQI
34AQI
28AQI
32AQI
27AQI
27AQI
24AQI
27AQI
21AQI
21AQI
27AQI
35AQI
36AQI
32AQI
28AQI
30AQI
21AQI
20AQI
18AQI
28AQI
37AQI
53AQI
61AQI
58AQI
64AQI
64AQI
59AQI
40AQI
38AQI
41AQI
47AQI
49AQI
42AQI
40AQI
44AQI
36AQI
32AQI
33AQI
29AQI
28AQI
27AQI
29AQI
34AQI
42AQI
41AQI
42AQI
37AQI
33AQI
24AQI
21AQI
19AQI
21AQI
25AQI
23AQI
27AQI
27AQI
27AQI
29AQI
25AQI
25AQI
25AQI
25AQI
23AQI
19AQI
17AQI
17AQI
18AQI
20AQI
24AQI
21AQI
22AQI
24AQI
22AQI
22AQI
23AQI
22AQI
23AQI
24AQI
24AQI
26AQI
29AQI
33AQI
43AQI
46AQI
48AQI
62AQI
53AQI
30AQI
32AQI
39AQI
26AQI
29AQI
No. of days
202541AQI
Highest AQI recorded in
February62AQI
Lowest AQI recorded in
July26AQI
202434AQI
Highest AQI recorded in
January51AQI
Lowest AQI recorded in
September24AQI
202337AQI
Highest AQI recorded in
February55AQI
Lowest AQI recorded in
November22AQI
202242AQI
Highest AQI recorded in
March75AQI
Lowest AQI recorded in
November23AQI
202140AQI
Highest AQI recorded in
November58AQI
Lowest AQI recorded in
May24AQI
202032AQI
Highest AQI recorded in
November47AQI
Lowest AQI recorded in
October22AQI
Most & Least Polluted Years Over the Last 6 Years
Saint Louis's annual 2025 AQI (41) shows an average percentage change of 10.4% (worsened AQI) compared to previous years: 2020 (32), 2021 (40), 2022 (42), 2023 (37), 2024 (34).