Dallas, 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
Dallas, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (27th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 19 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Sep - 28th Sep 2025
Dallas, Oregon, United States
6 AM27th Sep 2025
7 PM
5 AM28th Sep 2025
43AQI
20AQI
41AQI
19AQI
In the last 24 hours,
Dallas's AQI reached its highest point of 43 at 12 PM during the Day, while the lowest point, 19, was recorded at 10 PM during the Night between 27th Sep and 28th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Dallas, Oregon, United States
20°C14/30°C
19°C14/26°C
21°C16/29°C
18°C14/22°C
22°C13/31°C
24°C18/33°C
24°C17/34°C
22°C17/31°C
18°C15/21°C
18°C15/22°C
17°C13/20°C
19°C15/24°C
18°C15/23°C
18°C15/22°C
18°C15/22°C
18°C13/26°C
17°C14/21°C
16°C10/23°C
19°C11/32°C
18°C13/26°C
19°C12/27°C
19°C11/28°C
18°C14/27°C
17°C12/24°C
17°C9/27°C
22°C14/32°C
23°C12/32°C
18°C11/27°C
16°C8/26°C
19°C11/29°C
--°C/°C
42AQI
39AQI
39AQI
38AQI
2025 Days Vs Air Quality
Dallas, Oregon, United States
99%
185
0.5%
1
Total number of days with different AQI categories in last 271 days in 2025 (94 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 271 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
Dallas, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
16AQI
17AQI
15AQI
18AQI
15AQI
18AQI
17AQI
17AQI
20AQI
22AQI
18AQI
13AQI
13AQI
15AQI
18AQI
16AQI
18AQI
19AQI
20AQI
22AQI
21AQI
23AQI
24AQI
22AQI
17AQI
14AQI
14AQI
19AQI
21AQI
24AQI
21AQI
17AQI
13AQI
13AQI
15AQI
19AQI
19AQI
13AQI
14AQI
14AQI
16AQI
18AQI
15AQI
17AQI
17AQI
14AQI
15AQI
14AQI
16AQI
17AQI
17AQI
13AQI
14AQI
16AQI
12AQI
13AQI
14AQI
13AQI
16AQI
14AQI
13AQI
14AQI
15AQI
13AQI
17AQI
17AQI
13AQI
15AQI
16AQI
15AQI
16AQI
18AQI
16AQI
20AQI
23AQI
22AQI
22AQI
21AQI
17AQI
17AQI
18AQI
18AQI
16AQI
14AQI
15AQI
15AQI
11AQI
11AQI
20AQI
29AQI
24AQI
14AQI
13AQI
12AQI
15AQI
18AQI
17AQI
14AQI
14AQI
16AQI
21AQI
17AQI
17AQI
19AQI
15AQI
14AQI
16AQI
17AQI
17AQI
15AQI
18AQI
20AQI
23AQI
23AQI
18AQI
20AQI
19AQI
20AQI
18AQI
20AQI
16AQI
15AQI
18AQI
17AQI
17AQI
18AQI
20AQI
18AQI
16AQI
20AQI
23AQI
24AQI
18AQI
16AQI
16AQI
18AQI
23AQI
26AQI
25AQI
25AQI
16AQI
14AQI
13AQI
16AQI
16AQI
17AQI
17AQI
18AQI
24AQI
29AQI
34AQI
35AQI
42AQI
32AQI
25AQI
26AQI
24AQI
29AQI
23AQI
27AQI
40AQI
46AQI
50AQI
38AQI
27AQI
22AQI
22AQI
32AQI
35AQI
25AQI
30AQI
17AQI
18AQI
20AQI
24AQI
26AQI
32AQI
31AQI
22AQI
19AQI
31AQI
52AQI
31AQI
24AQI
19AQI
17AQI
18AQI
15AQI
17AQI
18AQI
22AQI
29AQI
No. of days
202520AQI
Highest AQI recorded in
September29AQI
Lowest AQI recorded in
May15AQI
Most & Least Polluted Years Over the Last 1 Years
Dallas's annual 2025 AQI (20) shows an average percentage change of NaN% (improved AQI) compared to previous years: .