Pendleton, Oregon, 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
Pendleton, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 21 of Good air quality, showing improvement over 2024, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 11th Oct - 12th Oct 2025
Pendleton, Oregon, United States
6 AM11th Oct 2025
6 PM
5 AM12th Oct 2025
30AQI
15AQI
33AQI
13AQI
In the last 24 hours,
Pendleton's AQI reached its highest point of 33 at 5 AM during the Night, while the lowest point, 13, was recorded at 3 AM during the Night between 11th Oct and 12th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Pendleton, Oregon, United States
--°C/°C
23°C15/32°C
18°C14/23°C
17°C10/25°C
20°C12/30°C
21°C14/31°C
22°C15/30°C
23°C17/32°C
24°C17/32°C
19°C13/24°C
15°C8/25°C
17°C7/27°C
20°C9/31°C
20°C11/31°C
17°C9/26°C
18°C9/29°C
19°C10/29°C
19°C13/29°C
18°C9/26°C
17°C12/24°C
14°C10/22°C
14°C8/22°C
15°C10/20°C
13°C7/20°C
12°C3/22°C
14°C5/27°C
16°C9/26°C
16°C9/26°C
14°C8/24°C
12°C8/18°C
11°C8/14°C
39AQI
36AQI
46AQI
35AQI
2025 Days Vs Air Quality
Pendleton, Oregon, United States
91%
258
9%
27
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 286 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
Pendleton, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI
30AQI
23AQI
28AQI
26AQI
24AQI
31AQI
31AQI
33AQI
25AQI
18AQI
28AQI
40AQI
42AQI
44AQI
33AQI
46AQI
39AQI
40AQI
40AQI
46AQI
54AQI
55AQI
48AQI
42AQI
40AQI
46AQI
47AQI
56AQI
61AQI
43AQI
21AQI
36AQI
33AQI
25AQI
26AQI
28AQI
23AQI
29AQI
39AQI
26AQI
32AQI
32AQI
36AQI
33AQI
30AQI
44AQI
45AQI
44AQI
24AQI
25AQI
21AQI
29AQI
19AQI
22AQI
18AQI
23AQI
32AQI
34AQI
36AQI
29AQI
18AQI
21AQI
20AQI
22AQI
29AQI
27AQI
29AQI
19AQI
20AQI
17AQI
16AQI
17AQI
20AQI
14AQI
16AQI
17AQI
21AQI
21AQI
17AQI
14AQI
17AQI
16AQI
19AQI
23AQI
18AQI
19AQI
18AQI
32AQI
16AQI
16AQI
17AQI
17AQI
21AQI
24AQI
23AQI
20AQI
14AQI
14AQI
16AQI
15AQI
16AQI
17AQI
21AQI
30AQI
24AQI
17AQI
21AQI
18AQI
17AQI
14AQI
12AQI
14AQI
22AQI
27AQI
25AQI
24AQI
16AQI
14AQI
16AQI
18AQI
19AQI
14AQI
13AQI
14AQI
16AQI
18AQI
15AQI
17AQI
20AQI
15AQI
15AQI
13AQI
14AQI
15AQI
13AQI
14AQI
11AQI
12AQI
10AQI
12AQI
16AQI
16AQI
16AQI
18AQI
15AQI
14AQI
16AQI
15AQI
14AQI
19AQI
14AQI
13AQI
15AQI
17AQI
18AQI
19AQI
20AQI
20AQI
27AQI
25AQI
25AQI
33AQI
26AQI
18AQI
24AQI
21AQI
19AQI
16AQI
16AQI
16AQI
12AQI
12AQI
18AQI
30AQI
32AQI
17AQI
14AQI
13AQI
15AQI
17AQI
21AQI
20AQI
17AQI
18AQI
22AQI
20AQI
21AQI
21AQI
17AQI
14AQI
18AQI
20AQI
22AQI
20AQI
19AQI
26AQI
35AQI
31AQI
35AQI
32AQI
41AQI
40AQI
30AQI
31AQI
19AQI
16AQI
16AQI
17AQI
20AQI
25AQI
30AQI
38AQI
49AQI
33AQI
22AQI
34AQI
24AQI
18AQI
18AQI
19AQI
23AQI
30AQI
33AQI
27AQI
20AQI
23AQI
13AQI
14AQI
18AQI
19AQI
19AQI
19AQI
25AQI
46AQI
57AQI
55AQI
57AQI
58AQI
61AQI
57AQI
56AQI
55AQI
55AQI
57AQI
59AQI
67AQI
74AQI
73AQI
59AQI
46AQI
36AQI
43AQI
55AQI
52AQI
54AQI
41AQI
21AQI
28AQI
41AQI
31AQI
40AQI
53AQI
33AQI
25AQI
51AQI
54AQI
36AQI
33AQI
40AQI
55AQI
72AQI
36AQI
25AQI
24AQI
31AQI
33AQI
30AQI
25AQI
42AQI
45AQI
44AQI
50AQI
24AQI
21AQI
38AQI
30AQI
21AQI
19AQI
15AQI
19AQI
24AQI
34AQI
47AQI
33AQI
No. of days
202528AQI
Highest AQI recorded in
September47AQI
Lowest AQI recorded in
May15AQI
202423AQI
Highest AQI recorded in
July36AQI
Lowest AQI recorded in
May9AQI
202323AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
April11AQI
202227AQI
Highest AQI recorded in
September44AQI
Lowest AQI recorded in
May10AQI
202126AQI
Highest AQI recorded in
August52AQI
Lowest AQI recorded in
May12AQI
202037AQI
Highest AQI recorded in
September109AQI
Lowest AQI recorded in
April16AQI
Most & Least Polluted Years Over the Last 6 Years
Pendleton's annual 2025 AQI (28) shows an average percentage change of 4.4% (worsened AQI) compared to previous years: 2020 (37), 2021 (26), 2022 (27), 2023 (23), 2024 (23).