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!
November Air Quality Analysis
Silverton, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (27th November ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 19 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Nov - 28th Nov 2025
Silverton, Oregon, United States
7 AM27th Nov 2025
4 PM
6 AM28th Nov 2025
22AQI
11AQI
11AQI
10AQI
In the last 24 hours,
Silverton's AQI reached its highest point of 22 at 7 AM during the Day, while the lowest point, 10, was recorded at 6 AM during the Night between 27th Nov and 28th Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
Silverton, Oregon, United States
11°C7/17°C
8°C3/14°C
11°C7/17°C
14°C9/16°C
9°C6/16°C
9°C8/11°C
12°C8/17°C
12°C10/18°C
13°C9/17°C
10°C8/13°C
9°C6/14°C
10°C6/15°C
11°C7/16°C
11°C8/15°C
11°C9/15°C
13°C11/17°C
13°C10/17°C
13°C10/18°C
10°C8/12°C
10°C6/12°C
6°C3/12°C
5°C1/8°C
8°C5/14°C
5°C2/9°C
3°C2/6°C
7°C5/8°C
6°C4/11°C
6°C2/10°C
9°C7/11°C
10°C8/13°C
--°C/°C
32AQI
30AQI
43AQI
33AQI
2025 Days Vs Air Quality
Silverton, Oregon, United States
96%
317
4%
14
Total number of days with different AQI categories in last 332 days in 2025 (33 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 332 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
18AQI
16AQI
17AQI
22AQI
24AQI
29AQI
31AQI
30AQI
16AQI
14AQI
13AQI
16AQI
16AQI
18AQI
18AQI
20AQI
26AQI
37AQI
46AQI
47AQI
52AQI
40AQI
31AQI
32AQI
31AQI
42AQI
28AQI
32AQI
51AQI
54AQI
58AQI
40AQI
31AQI
31AQI
27AQI
38AQI
39AQI
26AQI
38AQI
19AQI
20AQI
23AQI
28AQI
27AQI
37AQI
35AQI
23AQI
20AQI
30AQI
53AQI
34AQI
25AQI
25AQI
26AQI
31AQI
16AQI
16AQI
21AQI
32AQI
22AQI
24AQI
38AQI
36AQI
37AQI
42AQI
43AQI
26AQI
26AQI
29AQI
27AQI
32AQI
46AQI
49AQI
50AQI
30AQI
24AQI
44AQI
40AQI
34AQI
30AQI
13AQI
12AQI
18AQI
64AQI
28AQI
43AQI
58AQI
24AQI
19AQI
36AQI
30AQI
22AQI
19AQI
26AQI
41AQI
52AQI
60AQI
55AQI
64AQI
58AQI
36AQI
34AQI
40AQI
18AQI
42AQI
46AQI
37AQI
46AQI
46AQI
31AQI
21AQI
37AQI
14AQI
19AQI
35AQI
23AQI
19AQI
19AQI
17AQI
20AQI
19AQI
26AQI
32AQI
33AQI
36AQI
No. of days
202525AQI
Highest AQI recorded in
November36AQI
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 (25) shows an average percentage change of -1.9% (improved AQI) compared to previous years: 2020 (46), 2021 (22), 2022 (27), 2023 (25), 2024 (20).