John Day, Oregon, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
John Day, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (28th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 26 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 28th Sep - 29th Sep 2025
John Day, Oregon, United States
6 AM28th Sep 2025
7 PM
5 AM29th Sep 2025
60AQI
19AQI
55AQI
17AQI
In the last 24 hours,
John Day's AQI reached its highest point of 60 at 2 PM during the Day, while the lowest point, 17, was recorded at 5 AM during the Night between 28th Sep and 29th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
John Day, Oregon, United States
23°C14/32°C
24°C15/33°C
24°C12/33°C
24°C13/34°C
24°C14/33°C
24°C13/32°C
23°C13/32°C
20°C12/30°C
18°C8/27°C
21°C13/27°C
17°C9/24°C
14°C6/23°C
14°C6/21°C
16°C8/23°C
18°C7/26°C
14°C8/18°C
13°C6/21°C
16°C5/25°C
20°C11/28°C
21°C10/29°C
20°C10/29°C
21°C12/28°C
18°C10/25°C
14°C6/23°C
18°C8/28°C
20°C9/31°C
19°C12/29°C
15°C8/23°C
18°C7/28°C
21°C12/30°C
--°C/°C
41AQI
41AQI
40AQI
39AQI
2025 Days Vs Air Quality
John Day, Oregon, United States
92%
172
8%
15
Total number of days with different AQI categories in last 272 days in 2025 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 272 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
John Day, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
18AQI
19AQI
25AQI
37AQI
23AQI
36AQI
24AQI
42AQI
39AQI
26AQI
28AQI
24AQI
25AQI
28AQI
28AQI
19AQI
19AQI
31AQI
35AQI
28AQI
25AQI
25AQI
26AQI
27AQI
24AQI
15AQI
21AQI
22AQI
31AQI
32AQI
22AQI
28AQI
18AQI
14AQI
22AQI
18AQI
22AQI
20AQI
19AQI
24AQI
18AQI
17AQI
17AQI
19AQI
20AQI
18AQI
19AQI
15AQI
15AQI
21AQI
15AQI
25AQI
19AQI
24AQI
15AQI
17AQI
17AQI
17AQI
20AQI
20AQI
22AQI
18AQI
18AQI
20AQI
16AQI
19AQI
16AQI
15AQI
16AQI
17AQI
18AQI
21AQI
22AQI
23AQI
27AQI
30AQI
33AQI
29AQI
38AQI
21AQI
24AQI
27AQI
23AQI
20AQI
20AQI
21AQI
19AQI
19AQI
26AQI
27AQI
29AQI
21AQI
19AQI
17AQI
20AQI
20AQI
27AQI
29AQI
23AQI
21AQI
28AQI
24AQI
23AQI
28AQI
28AQI
21AQI
23AQI
25AQI
24AQI
33AQI
24AQI
21AQI
49AQI
46AQI
36AQI
35AQI
23AQI
28AQI
27AQI
30AQI
24AQI
17AQI
19AQI
19AQI
19AQI
23AQI
28AQI
41AQI
46AQI
39AQI
26AQI
23AQI
27AQI
18AQI
15AQI
17AQI
21AQI
23AQI
30AQI
32AQI
28AQI
27AQI
20AQI
19AQI
22AQI
24AQI
23AQI
21AQI
27AQI
44AQI
58AQI
56AQI
61AQI
57AQI
57AQI
56AQI
54AQI
54AQI
56AQI
55AQI
55AQI
50AQI
64AQI
51AQI
55AQI
55AQI
44AQI
42AQI
41AQI
42AQI
48AQI
41AQI
17AQI
17AQI
20AQI
21AQI
28AQI
35AQI
31AQI
19AQI
42AQI
34AQI
31AQI
34AQI
23AQI
26AQI
24AQI
26AQI
19AQI
23AQI
27AQI
34AQI
38AQI
No. of days
202528AQI
Highest AQI recorded in
September38AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 1 Years
John Day's annual 2025 AQI (28) shows an average percentage change of NaN% (improved AQI) compared to previous years: .