Everett, Washington, 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
Everett, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (20th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 48 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Sep - 21st Sep 2025
Everett, Washington, United States
6 AM20th Sep 2025
7 PM
5 AM21st Sep 2025
52AQI
40AQI
51AQI
30AQI
In the last 24 hours,
Everett's AQI reached its highest point of 52 at 4 PM during the Day, while the lowest point, 30, was recorded at 5 AM during the Night between 20th Sep and 21st Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Everett, Washington, United States
19°C13/28°C
21°C16/29°C
23°C17/30°C
23°C15/30°C
21°C14/29°C
22°C16/29°C
20°C16/24°C
19°C14/24°C
17°C14/22°C
17°C11/23°C
18°C16/21°C
17°C12/24°C
19°C13/25°C
20°C14/26°C
19°C12/28°C
18°C12/24°C
17°C15/19°C
18°C15/22°C
16°C11/20°C
18°C12/22°C
17°C13/19°C
18°C14/21°C
19°C10/25°C
17°C15/18°C
16°C11/20°C
22°C11/32°C
20°C15/24°C
15°C10/19°C
15°C6/21°C
17°C8/25°C
--°C/°C
43AQI
41AQI
47AQI
44AQI
2025 Days Vs Air Quality
Everett, Washington, United States
96%
171
4%
8
Total number of days with different AQI categories in last 264 days in 2025 (101 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 264 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
Everett, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
17AQI
19AQI
18AQI
21AQI
20AQI
18AQI
24AQI
21AQI
26AQI
24AQI
26AQI
14AQI
12AQI
15AQI
23AQI
16AQI
20AQI
21AQI
21AQI
20AQI
25AQI
21AQI
21AQI
27AQI
23AQI
20AQI
19AQI
22AQI
27AQI
35AQI
39AQI
34AQI
25AQI
17AQI
20AQI
22AQI
29AQI
16AQI
18AQI
19AQI
21AQI
23AQI
20AQI
19AQI
23AQI
22AQI
18AQI
23AQI
23AQI
23AQI
17AQI
16AQI
15AQI
20AQI
13AQI
14AQI
16AQI
22AQI
17AQI
21AQI
16AQI
19AQI
24AQI
18AQI
22AQI
24AQI
24AQI
23AQI
21AQI
22AQI
22AQI
21AQI
21AQI
24AQI
25AQI
27AQI
29AQI
36AQI
34AQI
27AQI
29AQI
27AQI
21AQI
18AQI
17AQI
25AQI
21AQI
19AQI
25AQI
37AQI
35AQI
21AQI
16AQI
17AQI
21AQI
24AQI
22AQI
21AQI
21AQI
21AQI
38AQI
25AQI
22AQI
22AQI
18AQI
21AQI
21AQI
24AQI
22AQI
23AQI
29AQI
30AQI
43AQI
39AQI
32AQI
28AQI
32AQI
29AQI
29AQI
25AQI
23AQI
26AQI
29AQI
27AQI
25AQI
25AQI
23AQI
25AQI
23AQI
31AQI
47AQI
40AQI
25AQI
21AQI
21AQI
24AQI
28AQI
28AQI
27AQI
35AQI
28AQI
17AQI
13AQI
19AQI
20AQI
21AQI
20AQI
28AQI
31AQI
35AQI
45AQI
56AQI
54AQI
54AQI
48AQI
52AQI
45AQI
47AQI
48AQI
46AQI
58AQI
51AQI
58AQI
60AQI
42AQI
36AQI
39AQI
42AQI
43AQI
35AQI
35AQI
27AQI
26AQI
34AQI
41AQI
32AQI
33AQI
48AQI
20AQI
23AQI
20AQI
24AQI
26AQI
33AQI
42AQI
No. of days
202527AQI
Highest AQI recorded in
September42AQI
Lowest AQI recorded in
May20AQI
Most & Least Polluted Years Over the Last 1 Years
Everett's annual 2025 AQI (27) shows an average percentage change of NaN% (improved AQI) compared to previous years: .