Rapid City, South Dakota, 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
Rapid City, South Dakota, United States
AQI Trends: Highest and Lowest
Same Day Analysis (20th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 39 of Good air quality, showing improvement over 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Aug - 21st Aug 2025
Rapid City, South Dakota, United States
5 AM20th Aug 2025
8 PM
4 AM21st Aug 2025
47AQI
32AQI
47AQI
37AQI
In the last 24 hours,
Rapid City's AQI reached its highest point of 47 at 1 PM during the Day, while the lowest point, 32, was recorded at 7 AM during the Day between 20th Aug and 21st Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Rapid City, South Dakota, United States
--°C/°C
20°C15/23°C
21°C15/26°C
24°C16/31°C
27°C20/33°C
26°C20/33°C
24°C18/31°C
17°C14/19°C
18°C15/20°C
16°C15/18°C
18°C15/24°C
22°C16/29°C
21°C19/25°C
22°C15/28°C
22°C14/30°C
23°C18/28°C
27°C19/34°C
23°C18/24°C
19°C14/26°C
19°C14/24°C
21°C15/26°C
20°C15/25°C
25°C18/33°C
27°C22/33°C
23°C18/29°C
23°C19/29°C
22°C18/27°C
24°C20/29°C
25°C21/30°C
27°C22/33°C
24°C21/29°C
39AQI
37AQI
37AQI
37AQI
2025 Days Vs Air Quality
Rapid City, South Dakota, United States
97%
224
3%
8
Total number of days with different AQI categories in last 234 days in 2025 (131 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2025, 97% of 234 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
Rapid City, South Dakota, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
42AQI
43AQI
40AQI
31AQI
27AQI
40AQI
40AQI
36AQI
31AQI
30AQI
28AQI
27AQI
29AQI
31AQI
31AQI
31AQI
43AQI
48AQI
38AQI
39AQI
38AQI
37AQI
35AQI
32AQI
32AQI
30AQI
35AQI
36AQI
35AQI
43AQI
32AQI
30AQI
27AQI
32AQI
34AQI
42AQI
35AQI
35AQI
37AQI
35AQI
41AQI
32AQI
41AQI
27AQI
30AQI
37AQI
26AQI
20AQI
21AQI
28AQI
27AQI
26AQI
19AQI
25AQI
20AQI
17AQI
17AQI
17AQI
19AQI
18AQI
18AQI
26AQI
22AQI
18AQI
16AQI
19AQI
18AQI
19AQI
19AQI
20AQI
20AQI
21AQI
31AQI
22AQI
19AQI
24AQI
28AQI
33AQI
21AQI
19AQI
18AQI
20AQI
20AQI
24AQI
22AQI
25AQI
32AQI
28AQI
25AQI
23AQI
24AQI
23AQI
26AQI
29AQI
26AQI
24AQI
25AQI
30AQI
32AQI
38AQI
37AQI
35AQI
31AQI
29AQI
22AQI
28AQI
26AQI
21AQI
18AQI
24AQI
22AQI
21AQI
23AQI
21AQI
21AQI
21AQI
28AQI
26AQI
19AQI
22AQI
23AQI
23AQI
24AQI
26AQI
31AQI
35AQI
29AQI
29AQI
29AQI
25AQI
26AQI
29AQI
41AQI
38AQI
29AQI
26AQI
22AQI
21AQI
28AQI
26AQI
25AQI
19AQI
20AQI
25AQI
23AQI
22AQI
20AQI
23AQI
20AQI
24AQI
45AQI
39AQI
42AQI
36AQI
31AQI
35AQI
31AQI
37AQI
58AQI
53AQI
53AQI
54AQI
57AQI
46AQI
31AQI
29AQI
28AQI
29AQI
27AQI
28AQI
34AQI
44AQI
43AQI
31AQI
30AQI
30AQI
26AQI
29AQI
30AQI
25AQI
24AQI
27AQI
31AQI
33AQI
34AQI
39AQI
27AQI
25AQI
26AQI
33AQI
31AQI
41AQI
31AQI
32AQI
31AQI
31AQI
31AQI
38AQI
45AQI
40AQI
38AQI
37AQI
35AQI
35AQI
29AQI
31AQI
39AQI
34AQI
34AQI
30AQI
37AQI
50AQI
54AQI
56AQI
52AQI
38AQI
33AQI
36AQI
37AQI
41AQI
27AQI
36AQI
42AQI
28AQI
31AQI
34AQI
38AQI
43AQI
41AQI
35AQI
34AQI
39AQI
35AQI
28AQI
22AQI
26AQI
27AQI
36AQI
34AQI
39AQI
No. of days
202531AQI
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
March22AQI
202437AQI
Highest AQI recorded in
July53AQI
Lowest AQI recorded in
November26AQI
202341AQI
Highest AQI recorded in
July51AQI
Lowest AQI recorded in
December31AQI
202239AQI
Highest AQI recorded in
September48AQI
Lowest AQI recorded in
August28AQI
202138AQI
Highest AQI recorded in
July56AQI
Lowest AQI recorded in
May28AQI
202035AQI
Highest AQI recorded in
September45AQI
Lowest AQI recorded in
May25AQI
Most & Least Polluted Years Over the Last 6 Years
Rapid City's annual 2025 AQI (31) shows an average percentage change of -19.2% (improved AQI) compared to previous years: 2020 (35), 2021 (38), 2022 (39), 2023 (41), 2024 (37).