Charleston, South Carolina, 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
Charleston, South Carolina, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 2nd highest AQI at 25 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Charleston, South Carolina, United States
6 AM12th Aug 2025
8 PM
5 AM13th Aug 2025
36AQI
18AQI
23AQI
19AQI
In the last 24 hours,
Charleston's AQI reached its highest point of 36 at 8 AM during the Day, while the lowest point, 18, was recorded at 5 PM during the Day between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Charleston, South Carolina, United States
29°C26/35°C
29°C26/34°C
29°C27/34°C
29°C27/33°C
30°C26/36°C
31°C26/38°C
32°C27/37°C
33°C27/39°C
30°C26/37°C
28°C26/31°C
29°C26/34°C
29°C25/35°C
31°C26/38°C
33°C27/40°C
31°C28/37°C
29°C27/32°C
30°C28/34°C
32°C27/38°C
32°C28/39°C
27°C24/33°C
26°C23/30°C
25°C23/26°C
29°C25/32°C
27°C24/31°C
26°C23/28°C
26°C24/31°C
25°C23/27°C
26°C25/27°C
28°C26/29°C
29°C26/31°C
--°C/°C
39AQI
39AQI
38AQI
38AQI
2025 Days Vs Air Quality
Charleston, South Carolina, United States
90%
202
10%
22
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 225 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
Charleston, South Carolina, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
36AQI
41AQI
39AQI
27AQI
36AQI
37AQI
29AQI
34AQI
36AQI
43AQI
25AQI
32AQI
39AQI
33AQI
32AQI
44AQI
41AQI
33AQI
27AQI
22AQI
26AQI
27AQI
34AQI
40AQI
42AQI
41AQI
43AQI
28AQI
33AQI
39AQI
40AQI
31AQI
36AQI
37AQI
46AQI
53AQI
51AQI
47AQI
46AQI
37AQI
43AQI
40AQI
35AQI
30AQI
26AQI
34AQI
29AQI
33AQI
39AQI
30AQI
34AQI
27AQI
42AQI
55AQI
57AQI
64AQI
81AQI
70AQI
42AQI
57AQI
44AQI
41AQI
34AQI
49AQI
28AQI
35AQI
49AQI
30AQI
41AQI
39AQI
48AQI
49AQI
46AQI
39AQI
52AQI
36AQI
25AQI
42AQI
37AQI
30AQI
52AQI
51AQI
38AQI
33AQI
38AQI
37AQI
42AQI
36AQI
38AQI
30AQI
43AQI
44AQI
44AQI
46AQI
39AQI
39AQI
46AQI
29AQI
42AQI
40AQI
34AQI
28AQI
34AQI
41AQI
52AQI
44AQI
52AQI
38AQI
29AQI
28AQI
38AQI
41AQI
42AQI
44AQI
42AQI
42AQI
44AQI
35AQI
26AQI
30AQI
35AQI
41AQI
35AQI
30AQI
34AQI
42AQI
49AQI
48AQI
32AQI
35AQI
28AQI
35AQI
29AQI
33AQI
45AQI
54AQI
49AQI
43AQI
42AQI
51AQI
48AQI
30AQI
42AQI
34AQI
38AQI
40AQI
34AQI
33AQI
36AQI
30AQI
34AQI
56AQI
62AQI
60AQI
54AQI
45AQI
41AQI
50AQI
49AQI
43AQI
40AQI
39AQI
30AQI
41AQI
40AQI
31AQI
29AQI
32AQI
34AQI
32AQI
36AQI
36AQI
36AQI
32AQI
39AQI
51AQI
46AQI
30AQI
27AQI
36AQI
37AQI
44AQI
49AQI
42AQI
43AQI
37AQI
29AQI
34AQI
37AQI
36AQI
32AQI
32AQI
35AQI
36AQI
35AQI
34AQI
42AQI
36AQI
33AQI
36AQI
40AQI
40AQI
47AQI
43AQI
29AQI
35AQI
55AQI
38AQI
42AQI
39AQI
40AQI
47AQI
45AQI
33AQI
38AQI
39AQI
37AQI
38AQI
32AQI
55AQI
47AQI
27AQI
25AQI
25AQI
35AQI
43AQI
40AQI
39AQI
38AQI
40AQI
39AQI
37AQI
No. of days
202539AQI
Highest AQI recorded in
February43AQI
Lowest AQI recorded in
January35AQI
202435AQI
Highest AQI recorded in
October41AQI
Lowest AQI recorded in
March25AQI
202327AQI
Highest AQI recorded in
November38AQI
Lowest AQI recorded in
December26AQI
202234AQI
Highest AQI recorded in
February43AQI
Lowest AQI recorded in
July25AQI
202135AQI
Highest AQI recorded in
December45AQI
Lowest AQI recorded in
June31AQI
202032AQI
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
October29AQI
Most & Least Polluted Years Over the Last 6 Years
Charleston's annual 2025 AQI (39) shows an average percentage change of 21.1% (worsened AQI) compared to previous years: 2020 (32), 2021 (35), 2022 (34), 2023 (27), 2024 (35).