Umatilla, Mountain Home Park, Washington, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Umatilla, Mountain Home Park, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 21 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Oct - 13th Oct 2025
Umatilla, Mountain Home Park, Washington, United States
6 AM12th Oct 2025
6 PM
5 AM13th Oct 2025
34AQI
14AQI
46AQI
13AQI
In the last 24 hours,
Umatilla's AQI reached its highest point of 46 at 8 PM during the Night, while the lowest point, 13, was recorded at 12 AM during the Night between 12th Oct and 13th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Umatilla, Mountain Home Park, Washington, United States
22°C15/29°C
16°C12/21°C
14°C9/21°C
19°C10/28°C
22°C16/30°C
22°C14/29°C
23°C16/30°C
23°C18/30°C
18°C10/22°C
15°C9/22°C
18°C10/27°C
22°C14/30°C
20°C15/27°C
16°C10/22°C
18°C12/27°C
20°C15/27°C
19°C13/27°C
17°C11/22°C
16°C12/23°C
13°C11/17°C
13°C8/19°C
13°C9/19°C
12°C7/18°C
12°C6/20°C
15°C9/24°C
17°C12/26°C
16°C11/23°C
15°C10/21°C
11°C8/14°C
8°C7/10°C
--°C/°C
39AQI
32AQI
41AQI
33AQI
2025 Days Vs Air Quality
Umatilla, Mountain Home Park, Washington, United States
88%
176
12%
25
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 286 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
Umatilla, Mountain Home Park, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
17AQI
17AQI
15AQI
20AQI
16AQI
16AQI
17AQI
17AQI
18AQI
20AQI
21AQI
19AQI
12AQI
13AQI
17AQI
16AQI
16AQI
17AQI
24AQI
23AQI
24AQI
17AQI
18AQI
19AQI
19AQI
13AQI
13AQI
18AQI
25AQI
23AQI
28AQI
30AQI
22AQI
16AQI
16AQI
19AQI
22AQI
19AQI
16AQI
17AQI
21AQI
22AQI
17AQI
20AQI
24AQI
18AQI
14AQI
15AQI
16AQI
18AQI
16AQI
13AQI
14AQI
15AQI
13AQI
13AQI
18AQI
20AQI
19AQI
22AQI
21AQI
15AQI
18AQI
17AQI
15AQI
21AQI
20AQI
14AQI
16AQI
18AQI
19AQI
22AQI
22AQI
24AQI
25AQI
26AQI
29AQI
36AQI
26AQI
20AQI
21AQI
22AQI
24AQI
18AQI
18AQI
19AQI
13AQI
15AQI
23AQI
38AQI
34AQI
23AQI
16AQI
15AQI
15AQI
19AQI
22AQI
22AQI
20AQI
19AQI
28AQI
20AQI
21AQI
23AQI
21AQI
16AQI
21AQI
22AQI
20AQI
21AQI
21AQI
29AQI
35AQI
31AQI
30AQI
32AQI
28AQI
34AQI
31AQI
31AQI
24AQI
19AQI
20AQI
19AQI
20AQI
24AQI
33AQI
49AQI
47AQI
39AQI
29AQI
29AQI
32AQI
18AQI
16AQI
18AQI
23AQI
27AQI
27AQI
40AQI
43AQI
24AQI
14AQI
17AQI
22AQI
28AQI
27AQI
23AQI
36AQI
56AQI
59AQI
55AQI
57AQI
60AQI
60AQI
56AQI
55AQI
62AQI
66AQI
62AQI
67AQI
66AQI
81AQI
89AQI
65AQI
56AQI
54AQI
61AQI
55AQI
51AQI
56AQI
44AQI
26AQI
30AQI
36AQI
38AQI
35AQI
47AQI
39AQI
26AQI
43AQI
44AQI
29AQI
43AQI
64AQI
54AQI
57AQI
30AQI
25AQI
18AQI
32AQI
34AQI
26AQI
31AQI
41AQI
38AQI
40AQI
44AQI
22AQI
21AQI
18AQI
19AQI
18AQI
22AQI
24AQI
37AQI
50AQI
31AQI
No. of days
202528AQI
Highest AQI recorded in
September50AQI
Lowest AQI recorded in
May18AQI
Most & Least Polluted Years Over the Last 1 Years
Umatilla's annual 2025 AQI (28) shows an average percentage change of NaN% (improved AQI) compared to previous years: .