Silverton, 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
Silverton, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (5th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 29 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Silverton, Oregon, United States
5 AM5th Aug 2025
8 PM
4 AM6th Aug 2025
36AQI
27AQI
27AQI
19AQI
In the last 24 hours,
Silverton's AQI reached its highest point of 36 at 3 PM during the Day, while the lowest point, 19, was recorded at 4 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Silverton, Oregon, United States
22°C13/32°C
23°C14/33°C
20°C13/27°C
19°C16/24°C
22°C13/32°C
23°C16/33°C
25°C16/36°C
21°C13/31°C
22°C11/34°C
27°C18/37°C
21°C11/31°C
20°C12/29°C
19°C13/28°C
18°C12/23°C
19°C16/24°C
20°C12/30°C
23°C13/34°C
22°C12/31°C
19°C12/26°C
16°C11/22°C
19°C12/28°C
20°C10/31°C
23°C13/35°C
23°C14/33°C
22°C13/31°C
22°C14/32°C
19°C15/23°C
18°C13/22°C
18°C14/24°C
19°C11/29°C
--°C/°C
20AQI
18AQI
20AQI
18AQI
2025 Days Vs Air Quality
Silverton, Oregon, United States
99%
215
0.9%
2
Total number of days with different AQI categories in last 218 days in 2025 (147 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 218 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
Silverton, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
29AQI
30AQI
22AQI
18AQI
20AQI
23AQI
26AQI
37AQI
33AQI
34AQI
24AQI
27AQI
30AQI
36AQI
43AQI
30AQI
34AQI
34AQI
40AQI
36AQI
46AQI
48AQI
47AQI
52AQI
33AQI
29AQI
36AQI
47AQI
56AQI
46AQI
29AQI
21AQI
22AQI
22AQI
36AQI
24AQI
22AQI
23AQI
22AQI
26AQI
30AQI
22AQI
28AQI
26AQI
24AQI
34AQI
23AQI
17AQI
19AQI
20AQI
18AQI
22AQI
20AQI
16AQI
20AQI
20AQI
24AQI
27AQI
29AQI
30AQI
21AQI
18AQI
20AQI
20AQI
21AQI
22AQI
25AQI
23AQI
19AQI
34AQI
19AQI
16AQI
17AQI
16AQI
15AQI
15AQI
15AQI
16AQI
14AQI
14AQI
16AQI
15AQI
17AQI
21AQI
23AQI
16AQI
16AQI
15AQI
21AQI
15AQI
19AQI
17AQI
16AQI
22AQI
25AQI
22AQI
13AQI
13AQI
15AQI
17AQI
18AQI
17AQI
20AQI
22AQI
23AQI
23AQI
23AQI
23AQI
22AQI
19AQI
14AQI
15AQI
20AQI
25AQI
27AQI
26AQI
19AQI
13AQI
14AQI
18AQI
24AQI
19AQI
13AQI
15AQI
16AQI
18AQI
22AQI
16AQI
20AQI
18AQI
14AQI
15AQI
14AQI
18AQI
19AQI
18AQI
14AQI
16AQI
16AQI
12AQI
13AQI
16AQI
15AQI
18AQI
15AQI
14AQI
16AQI
21AQI
14AQI
18AQI
18AQI
15AQI
17AQI
19AQI
15AQI
17AQI
20AQI
17AQI
25AQI
30AQI
27AQI
28AQI
25AQI
19AQI
18AQI
20AQI
20AQI
17AQI
15AQI
16AQI
15AQI
13AQI
13AQI
20AQI
35AQI
29AQI
17AQI
13AQI
13AQI
17AQI
20AQI
21AQI
15AQI
15AQI
16AQI
24AQI
18AQI
18AQI
21AQI
15AQI
14AQI
17AQI
19AQI
19AQI
16AQI
19AQI
22AQI
25AQI
25AQI
20AQI
19AQI
20AQI
22AQI
21AQI
18AQI
17AQI
16AQI
20AQI
19AQI
18AQI
20AQI
22AQI
19AQI
18AQI
20AQI
24AQI
29AQI
35AQI
23AQI
19AQI
19AQI
17AQI
20AQI
19AQI
22AQI
No. of days
202522AQI
Highest AQI recorded in
January35AQI
Lowest AQI recorded in
May17AQI
202420AQI
Highest AQI recorded in
December32AQI
Lowest AQI recorded in
May13AQI
202325AQI
Highest AQI recorded in
November39AQI
Lowest AQI recorded in
April13AQI
202227AQI
Highest AQI recorded in
October49AQI
Lowest AQI recorded in
May12AQI
202122AQI
Highest AQI recorded in
March33AQI
Lowest AQI recorded in
May16AQI
202046AQI
Highest AQI recorded in
September156AQI
Lowest AQI recorded in
June21AQI
Most & Least Polluted Years Over the Last 6 Years
Silverton's annual 2025 AQI (22) shows an average percentage change of -16.09% (improved AQI) compared to previous years: 2020 (46), 2021 (22), 2022 (27), 2023 (25), 2024 (20).