Shelton, Washington, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Shelton, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 33 of Good air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Oct - 13th Oct 2025
Shelton, Washington, United States
7 AM12th Oct 2025
6 PM
6 AM13th Oct 2025
50AQI
17AQI
43AQI
13AQI
In the last 24 hours,
Shelton's AQI reached its highest point of 50 at 8 AM during the Day, while the lowest point, 13, was recorded at 5 AM during the Night between 12th Oct and 13th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Shelton, Washington, United States
18°C13/23°C
17°C12/21°C
17°C13/24°C
22°C14/31°C
19°C15/24°C
17°C13/22°C
19°C11/27°C
15°C10/21°C
17°C13/22°C
16°C11/24°C
17°C9/28°C
17°C10/26°C
13°C9/20°C
14°C8/23°C
18°C11/27°C
15°C9/21°C
15°C13/16°C
14°C11/20°C
15°C11/20°C
15°C11/20°C
13°C7/19°C
14°C12/18°C
14°C9/22°C
14°C5/25°C
14°C5/26°C
13°C8/19°C
13°C8/19°C
12°C9/17°C
10°C6/17°C
11°C7/16°C
--°C/°C
28AQI
24AQI
27AQI
22AQI
2025 Days Vs Air Quality
Shelton, Washington, United States
98%
280
2%
5
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 98%
Health Risk Level:
Very Low
In 2025, 98% of 286 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
Shelton, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
27AQI
29AQI
26AQI
26AQI
20AQI
19AQI
30AQI
29AQI
28AQI
27AQI
20AQI
28AQI
31AQI
42AQI
39AQI
29AQI
30AQI
36AQI
44AQI
45AQI
46AQI
51AQI
56AQI
45AQI
40AQI
47AQI
51AQI
54AQI
57AQI
44AQI
27AQI
19AQI
22AQI
25AQI
28AQI
22AQI
23AQI
30AQI
28AQI
27AQI
27AQI
26AQI
34AQI
24AQI
26AQI
28AQI
21AQI
20AQI
23AQI
19AQI
19AQI
27AQI
21AQI
15AQI
20AQI
18AQI
24AQI
29AQI
27AQI
33AQI
24AQI
17AQI
22AQI
23AQI
22AQI
21AQI
20AQI
19AQI
17AQI
19AQI
20AQI
16AQI
19AQI
16AQI
16AQI
17AQI
16AQI
20AQI
14AQI
16AQI
16AQI
15AQI
15AQI
27AQI
21AQI
17AQI
16AQI
16AQI
20AQI
17AQI
18AQI
16AQI
16AQI
24AQI
25AQI
16AQI
14AQI
16AQI
16AQI
21AQI
16AQI
19AQI
18AQI
24AQI
22AQI
21AQI
21AQI
30AQI
21AQI
16AQI
13AQI
17AQI
19AQI
26AQI
33AQI
25AQI
18AQI
13AQI
13AQI
15AQI
25AQI
20AQI
12AQI
13AQI
19AQI
19AQI
14AQI
14AQI
15AQI
15AQI
15AQI
14AQI
17AQI
16AQI
16AQI
15AQI
12AQI
12AQI
15AQI
11AQI
13AQI
18AQI
13AQI
14AQI
12AQI
13AQI
14AQI
19AQI
13AQI
16AQI
17AQI
17AQI
19AQI
20AQI
14AQI
16AQI
19AQI
21AQI
23AQI
30AQI
33AQI
29AQI
24AQI
17AQI
17AQI
19AQI
17AQI
16AQI
14AQI
15AQI
15AQI
12AQI
13AQI
16AQI
30AQI
21AQI
13AQI
13AQI
13AQI
17AQI
19AQI
17AQI
14AQI
14AQI
16AQI
19AQI
18AQI
20AQI
19AQI
16AQI
17AQI
20AQI
18AQI
24AQI
18AQI
21AQI
24AQI
28AQI
24AQI
21AQI
18AQI
21AQI
18AQI
18AQI
18AQI
16AQI
19AQI
20AQI
20AQI
22AQI
19AQI
18AQI
19AQI
17AQI
22AQI
36AQI
24AQI
20AQI
18AQI
21AQI
20AQI
25AQI
28AQI
29AQI
24AQI
18AQI
15AQI
15AQI
19AQI
21AQI
21AQI
20AQI
22AQI
27AQI
30AQI
38AQI
42AQI
42AQI
31AQI
32AQI
30AQI
30AQI
37AQI
28AQI
35AQI
48AQI
31AQI
41AQI
30AQI
27AQI
28AQI
36AQI
41AQI
30AQI
23AQI
27AQI
19AQI
21AQI
25AQI
28AQI
25AQI
30AQI
30AQI
21AQI
22AQI
35AQI
46AQI
19AQI
25AQI
22AQI
15AQI
18AQI
15AQI
15AQI
19AQI
20AQI
24AQI
20AQI
38AQI
44AQI
25AQI
29AQI
40AQI
26AQI
33AQI
36AQI
24AQI
19AQI
19AQI
15AQI
19AQI
19AQI
26AQI
28AQI
28AQI
No. of days
202523AQI
Highest AQI recorded in
January36AQI
Lowest AQI recorded in
May15AQI
202418AQI
Highest AQI recorded in
December30AQI
Lowest AQI recorded in
May9AQI
202323AQI
Highest AQI recorded in
November39AQI
Lowest AQI recorded in
April13AQI
202224AQI
Highest AQI recorded in
October46AQI
Lowest AQI recorded in
May13AQI
202119AQI
Highest AQI recorded in
January28AQI
Lowest AQI recorded in
May12AQI
202032AQI
Highest AQI recorded in
September82AQI
Lowest AQI recorded in
June19AQI
Most & Least Polluted Years Over the Last 6 Years
Shelton's annual 2025 AQI (23) shows an average percentage change of 2.9% (worsened AQI) compared to previous years: 2020 (32), 2021 (19), 2022 (24), 2023 (23), 2024 (18).