Forest Park, St Louis, Missouri, United States 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
Forest Park, St Louis, Missouri, United States
AQI Trends: Highest and Lowest
Same Day Analysis (9th August ):
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: 9th Aug - 10th Aug 2025
Forest Park, St Louis, Missouri, United States
5 AM9th Aug 2025
8 PM
4 AM10th Aug 2025
44AQI
31AQI
52AQI
36AQI
In the last 24 hours,
Forest Park's AQI reached its highest point of 52 at 2 AM during the Night, while the lowest point, 31, was recorded at 8 AM during the Day between 9th Aug and 10th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Forest Park, St Louis, Missouri, United States
30°C23/37°C
29°C25/34°C
26°C23/30°C
26°C23/30°C
28°C24/33°C
30°C23/39°C
28°C25/34°C
27°C24/31°C
28°C24/35°C
32°C26/39°C
26°C23/31°C
29°C24/36°C
31°C26/39°C
31°C25/37°C
31°C25/36°C
31°C26/37°C
31°C26/37°C
32°C28/38°C
33°C27/40°C
31°C24/36°C
26°C23/27°C
24°C19/31°C
23°C18/29°C
24°C17/28°C
26°C20/32°C
26°C22/33°C
29°C22/36°C
29°C24/35°C
31°C25/38°C
31°C24/38°C
--°C/°C
42AQI
42AQI
43AQI
43AQI
2025 Days Vs Air Quality
Forest Park, St Louis, Missouri, United States
90%
198
10%
21
0.9%
2
Total number of days with different AQI categories in last 222 days in 2025 (143 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 222 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
Forest Park, St Louis, Missouri, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
37AQI
24AQI
21AQI
22AQI
20AQI
29AQI
44AQI
57AQI
55AQI
38AQI
33AQI
26AQI
29AQI
42AQI
37AQI
39AQI
21AQI
18AQI
22AQI
24AQI
30AQI
33AQI
33AQI
40AQI
29AQI
27AQI
21AQI
25AQI
41AQI
21AQI
33AQI
26AQI
37AQI
27AQI
26AQI
25AQI
28AQI
29AQI
28AQI
27AQI
30AQI
50AQI
27AQI
28AQI
27AQI
30AQI
20AQI
22AQI
22AQI
22AQI
39AQI
45AQI
42AQI
39AQI
32AQI
28AQI
24AQI
23AQI
22AQI
30AQI
31AQI
41AQI
24AQI
24AQI
28AQI
31AQI
46AQI
40AQI
41AQI
47AQI
60AQI
47AQI
126AQI
25AQI
39AQI
29AQI
34AQI
23AQI
33AQI
22AQI
26AQI
21AQI
22AQI
31AQI
44AQI
34AQI
34AQI
33AQI
18AQI
28AQI
33AQI
21AQI
24AQI
23AQI
19AQI
21AQI
17AQI
23AQI
36AQI
38AQI
48AQI
34AQI
33AQI
20AQI
26AQI
42AQI
45AQI
42AQI
50AQI
21AQI
36AQI
37AQI
40AQI
34AQI
21AQI
23AQI
32AQI
27AQI
22AQI
22AQI
25AQI
22AQI
19AQI
18AQI
32AQI
27AQI
37AQI
24AQI
34AQI
33AQI
35AQI
30AQI
40AQI
53AQI
36AQI
22AQI
26AQI
26AQI
28AQI
16AQI
14AQI
19AQI
32AQI
34AQI
22AQI
26AQI
24AQI
41AQI
24AQI
38AQI
40AQI
43AQI
52AQI
48AQI
38AQI
52AQI
64AQI
50AQI
53AQI
57AQI
68AQI
70AQI
46AQI
33AQI
40AQI
29AQI
32AQI
34AQI
26AQI
36AQI
48AQI
52AQI
56AQI
53AQI
48AQI
48AQI
33AQI
27AQI
22AQI
26AQI
26AQI
37AQI
49AQI
58AQI
89AQI
60AQI
36AQI
47AQI
28AQI
34AQI
42AQI
33AQI
35AQI
34AQI
39AQI
36AQI
29AQI
27AQI
45AQI
52AQI
33AQI
43AQI
54AQI
56AQI
38AQI
39AQI
27AQI
33AQI
42AQI
38AQI
39AQI
104AQI
69AQI
34AQI
36AQI
31AQI
43AQI
47AQI
47AQI
38AQI
31AQI
30AQI
36AQI
31AQI
28AQI
44AQI
41AQI
50AQI
No. of days
202535AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
May28AQI
202432AQI
Highest AQI recorded in
October39AQI
Lowest AQI recorded in
November26AQI
202337AQI
Highest AQI recorded in
June57AQI
Lowest AQI recorded in
April29AQI
202233AQI
Highest AQI recorded in
July43AQI
Lowest AQI recorded in
October26AQI
202138AQI
Highest AQI recorded in
July52AQI
Lowest AQI recorded in
April32AQI
202038AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
March24AQI
Most & Least Polluted Years Over the Last 6 Years
Forest Park's annual 2025 AQI (35) shows an average percentage change of -0.6% (improved AQI) compared to previous years: 2020 (38), 2021 (38), 2022 (33), 2023 (37), 2024 (32).