Sumner, Portland, Oregon, 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
Sumner, Portland, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 20 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
Sumner, Portland, Oregon, United States
5 AM3rd Aug 2025
8 PM
4 AM4th Aug 2025
21AQI
16AQI
24AQI
21AQI
In the last 24 hours,
Sumner's AQI reached its highest point of 24 at 9 PM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Sumner, Portland, Oregon, United States
19°C13/26°C
21°C14/29°C
24°C15/32°C
24°C16/34°C
21°C18/26°C
21°C17/26°C
23°C16/33°C
24°C17/30°C
26°C19/37°C
20°C16/29°C
24°C14/33°C
29°C21/37°C
24°C17/32°C
22°C17/29°C
19°C15/26°C
18°C14/22°C
20°C16/24°C
21°C15/30°C
24°C17/34°C
22°C17/31°C
19°C15/24°C
17°C13/22°C
20°C14/28°C
22°C15/31°C
24°C16/33°C
23°C17/32°C
22°C17/30°C
21°C16/28°C
19°C17/23°C
18°C15/22°C
--°C/°C
21AQI
21AQI
21AQI
21AQI
2025 Days Vs Air Quality
Sumner, Portland, Oregon, United States
100%
131
Total number of days with different AQI categories in last 216 days in 2025 (149 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 216 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
Sumner, Portland, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
19AQI
18AQI
21AQI
29AQI
19AQI
24AQI
18AQI
26AQI
31AQI
20AQI
33AQI
17AQI
16AQI
20AQI
20AQI
20AQI
19AQI
23AQI
24AQI
27AQI
28AQI
25AQI
28AQI
24AQI
19AQI
19AQI
21AQI
25AQI
34AQI
38AQI
28AQI
24AQI
17AQI
18AQI
19AQI
33AQI
24AQI
15AQI
16AQI
20AQI
25AQI
23AQI
26AQI
28AQI
22AQI
15AQI
19AQI
20AQI
22AQI
20AQI
22AQI
21AQI
15AQI
18AQI
13AQI
18AQI
23AQI
20AQI
20AQI
18AQI
15AQI
19AQI
23AQI
16AQI
21AQI
18AQI
18AQI
24AQI
25AQI
18AQI
18AQI
22AQI
21AQI
31AQI
33AQI
33AQI
36AQI
32AQI
23AQI
20AQI
23AQI
25AQI
21AQI
16AQI
18AQI
17AQI
18AQI
18AQI
25AQI
31AQI
32AQI
29AQI
18AQI
14AQI
20AQI
23AQI
21AQI
17AQI
16AQI
16AQI
21AQI
18AQI
20AQI
23AQI
16AQI
15AQI
18AQI
18AQI
18AQI
16AQI
18AQI
20AQI
32AQI
31AQI
22AQI
21AQI
23AQI
25AQI
23AQI
24AQI
19AQI
18AQI
23AQI
23AQI
21AQI
26AQI
22AQI
18AQI
16AQI
20AQI
21AQI
24AQI
20AQI
23AQI
21AQI
18AQI
No. of days
202522AQI
Highest AQI recorded in
April24AQI
Lowest AQI recorded in
August18AQI
Most & Least Polluted Years Over the Last 1 Years
Sumner's annual 2025 AQI (22) shows an average percentage change of NaN% (improved AQI) compared to previous years: .