Yellowstone NP, Lake, Wyoming, 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
Yellowstone NP, Lake, Wyoming, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 25 of Good air quality on the same day.
Day & Night AQI Trend: 17th Aug - 18th Aug 2026
Yellowstone NP, Lake, Wyoming, United States
6 AM17th Aug 2026
8 PM
5 AM18th Aug 2026
33AQI
17AQI
33AQI
19AQI
In the last 24 hours,
Yellowstone NP's AQI reached its highest point of 33 at 6 AM during the Day, while the lowest point, 17, was recorded at 7 PM during the Day between 17th Aug and 18th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Yellowstone NP, Lake, Wyoming, United States
19°C11/27°C
18°C10/28°C
15°C10/25°C
16°C12/22°C
19°C10/27°C
18°C11/26°C
19°C11/27°C
18°C11/25°C
18°C8/26°C
15°C10/26°C
17°C8/25°C
18°C9/27°C
19°C10/29°C
18°C10/26°C
13°C5/20°C
11°C2/21°C
13°C4/23°C
16°C6/26°C
18°C8/27°C
18°C9/27°C
18°C8/26°C
18°C8/27°C
17°C7/26°C
15°C8/23°C
11°C7/21°C
12°C8/16°C
12°C6/19°C
10°C6/22°C
14°C8/23°C
14°C8/21°C
29AQI
25AQI
28AQI
26AQI
2026 Days Vs Air Quality
Yellowstone NP, Lake, Wyoming, United States
100%
226
Total number of days with different AQI categories in last 230 days in 2026 (135 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2026, 100% of 230 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
Yellowstone NP, Lake, Wyoming, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI (US)
15AQI (US)
14AQI (US)
16AQI (US)
18AQI (US)
19AQI (US)
12AQI (US)
13AQI (US)
14AQI (US)
16AQI (US)
21AQI (US)
18AQI (US)
18AQI (US)
15AQI (US)
12AQI (US)
15AQI (US)
13AQI (US)
14AQI (US)
16AQI (US)
13AQI (US)
18AQI (US)
27AQI (US)
20AQI (US)
23AQI (US)
38AQI (US)
32AQI (US)
28AQI (US)
23AQI (US)
35AQI (US)
24AQI (US)
33AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
20AQI (US)
26AQI (US)
31AQI (US)
29AQI (US)
28AQI (US)
31AQI (US)
33AQI (US)
33AQI (US)
30AQI (US)
23AQI (US)
25AQI (US)
34AQI (US)
33AQI (US)
34AQI (US)
31AQI (US)
29AQI (US)
21AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
25AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
30AQI (US)
32AQI (US)
34AQI (US)
31AQI (US)
28AQI (US)
32AQI (US)
30AQI (US)
22AQI (US)
27AQI (US)
31AQI (US)
24AQI (US)
31AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
19AQI (US)
29AQI (US)
27AQI (US)
18AQI (US)
28AQI (US)
29AQI (US)
27AQI (US)
24AQI (US)
27AQI (US)
19AQI (US)
17AQI (US)
22AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
29AQI (US)
27AQI (US)
25AQI (US)
23AQI (US)
21AQI (US)
19AQI (US)
23AQI (US)
18AQI (US)
19AQI (US)
20AQI (US)
24AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
24AQI (US)
30AQI (US)
28AQI (US)
25AQI (US)
18AQI (US)
25AQI (US)
27AQI (US)
32AQI (US)
32AQI (US)
25AQI (US)
20AQI (US)
18AQI (US)
20AQI (US)
23AQI (US)
15AQI (US)
17AQI (US)
19AQI (US)
20AQI (US)
21AQI (US)
15AQI (US)
14AQI (US)
19AQI (US)
15AQI (US)
15AQI (US)
20AQI (US)
26AQI (US)
23AQI (US)
21AQI (US)
22AQI (US)
24AQI (US)
21AQI (US)
19AQI (US)
25AQI (US)
25AQI (US)
28AQI (US)
15AQI (US)
13AQI (US)
20AQI (US)
20AQI (US)
17AQI (US)
12AQI (US)
24AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
21AQI (US)
17AQI (US)
19AQI (US)
15AQI (US)
13AQI (US)
13AQI (US)
18AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
21AQI (US)
21AQI (US)
18AQI (US)
17AQI (US)
17AQI (US)
23AQI (US)
17AQI (US)
14AQI (US)
21AQI (US)
20AQI (US)
16AQI (US)
12AQI (US)
14AQI (US)
17AQI (US)
23AQI (US)
28AQI (US)
25AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
24AQI (US)
24AQI (US)
18AQI (US)
16AQI (US)
24AQI (US)
16AQI (US)
15AQI (US)
13AQI (US)
16AQI (US)
12AQI (US)
17AQI (US)
19AQI (US)
17AQI (US)
17AQI (US)
20AQI (US)
22AQI (US)
23AQI (US)
22AQI (US)
21AQI (US)
22AQI (US)
23AQI (US)
24AQI (US)
27AQI (US)
29AQI (US)
28AQI (US)
21AQI (US)
22AQI (US)
27AQI (US)
20AQI (US)
20AQI (US)
29AQI (US)
30AQI (US)
24AQI (US)
21AQI (US)
31AQI (US)
35AQI (US)
45AQI (US)
35AQI (US)
34AQI (US)
32AQI (US)
24AQI (US)
22AQI (US)
24AQI (US)
23AQI (US)
25AQI (US)
25AQI (US)
20AQI (US)
28AQI (US)
26AQI (US)
24AQI (US)
20AQI (US)
20AQI (US)
21AQI (US)
28AQI (US)
No. of days
202623AQI (US)
Highest AQI (US) recorded in
February28AQI (US)
Lowest AQI (US) recorded in
June20AQI (US)
202522AQI (US)
Highest AQI (US) recorded in
August30AQI (US)
Lowest AQI (US) recorded in
May17AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Yellowstone NP's annual 2026 AQI (US) (23) shows an average percentage change of 4.5% (worsened AQI (US)) compared to previous years: 2025 (22).