Wenatchee, 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
Wenatchee, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (20th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 59 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Wenatchee, Washington, United States
6 AM21st Sep 2025
7 PM
5 AM22nd Sep 2025
55AQI
45AQI
49AQI
39AQI
In the last 24 hours,
Wenatchee's AQI reached its highest point of 55 at 10 AM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Wenatchee, Washington, United States
25°C13/37°C
29°C21/38°C
29°C21/39°C
26°C16/35°C
23°C15/34°C
22°C12/32°C
25°C16/33°C
24°C14/35°C
24°C13/37°C
23°C13/34°C
25°C14/39°C
27°C16/41°C
29°C14/40°C
28°C20/37°C
26°C19/36°C
22°C11/32°C
18°C7/31°C
17°C8/28°C
18°C6/32°C
20°C8/32°C
18°C7/31°C
19°C8/32°C
15°C5/23°C
14°C2/27°C
16°C3/28°C
18°C6/32°C
18°C6/31°C
21°C13/32°C
19°C8/33°C
17°C4/25°C
--°C/°C
58AQI
54AQI
58AQI
56AQI
2025 Days Vs Air Quality
Wenatchee, Washington, United States
92%
242
7%
19
0.7%
2
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 265 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
Wenatchee, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
41AQI
34AQI
31AQI
35AQI
30AQI
26AQI
29AQI
28AQI
23AQI
29AQI
25AQI
30AQI
31AQI
36AQI
41AQI
32AQI
30AQI
34AQI
34AQI
32AQI
36AQI
41AQI
43AQI
41AQI
30AQI
33AQI
39AQI
41AQI
47AQI
53AQI
57AQI
29AQI
24AQI
26AQI
25AQI
23AQI
30AQI
29AQI
34AQI
34AQI
26AQI
26AQI
32AQI
32AQI
31AQI
29AQI
37AQI
34AQI
31AQI
30AQI
28AQI
31AQI
39AQI
31AQI
21AQI
20AQI
21AQI
23AQI
27AQI
29AQI
28AQI
20AQI
21AQI
18AQI
17AQI
19AQI
24AQI
25AQI
17AQI
18AQI
19AQI
18AQI
18AQI
17AQI
16AQI
18AQI
15AQI
20AQI
18AQI
16AQI
16AQI
18AQI
16AQI
20AQI
22AQI
18AQI
16AQI
16AQI
20AQI
20AQI
18AQI
17AQI
19AQI
19AQI
25AQI
30AQI
29AQI
14AQI
15AQI
20AQI
16AQI
17AQI
20AQI
28AQI
31AQI
23AQI
19AQI
22AQI
22AQI
16AQI
14AQI
15AQI
22AQI
35AQI
34AQI
36AQI
31AQI
21AQI
14AQI
18AQI
21AQI
23AQI
17AQI
14AQI
16AQI
19AQI
21AQI
16AQI
21AQI
24AQI
17AQI
14AQI
15AQI
15AQI
16AQI
13AQI
14AQI
13AQI
18AQI
11AQI
13AQI
19AQI
19AQI
20AQI
24AQI
18AQI
18AQI
22AQI
19AQI
17AQI
21AQI
13AQI
16AQI
18AQI
17AQI
23AQI
21AQI
20AQI
25AQI
29AQI
29AQI
29AQI
32AQI
24AQI
19AQI
22AQI
26AQI
26AQI
17AQI
18AQI
18AQI
14AQI
15AQI
38AQI
52AQI
46AQI
19AQI
14AQI
12AQI
17AQI
21AQI
27AQI
20AQI
19AQI
19AQI
24AQI
20AQI
20AQI
23AQI
17AQI
15AQI
18AQI
18AQI
18AQI
17AQI
19AQI
25AQI
31AQI
30AQI
22AQI
21AQI
25AQI
26AQI
29AQI
32AQI
18AQI
18AQI
20AQI
19AQI
19AQI
23AQI
26AQI
34AQI
35AQI
34AQI
31AQI
37AQI
26AQI
16AQI
16AQI
17AQI
24AQI
22AQI
24AQI
29AQI
28AQI
26AQI
13AQI
15AQI
18AQI
19AQI
18AQI
18AQI
25AQI
28AQI
37AQI
42AQI
48AQI
49AQI
51AQI
54AQI
52AQI
47AQI
58AQI
64AQI
69AQI
80AQI
105AQI
116AQI
84AQI
52AQI
52AQI
54AQI
62AQI
59AQI
60AQI
48AQI
26AQI
37AQI
43AQI
43AQI
55AQI
59AQI
35AQI
29AQI
19AQI
22AQI
18AQI
23AQI
22AQI
30AQI
61AQI
No. of days
202527AQI
Highest AQI recorded in
September61AQI
Lowest AQI recorded in
May18AQI
202421AQI
Highest AQI recorded in
December32AQI
Lowest AQI recorded in
May11AQI
202327AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
April14AQI
202234AQI
Highest AQI recorded in
October87AQI
Lowest AQI recorded in
May12AQI
202125AQI
Highest AQI recorded in
August43AQI
Lowest AQI recorded in
May12AQI
202030AQI
Highest AQI recorded in
September83AQI
Lowest AQI recorded in
June8AQI
Most & Least Polluted Years Over the Last 6 Years
Wenatchee's annual 2025 AQI (27) shows an average percentage change of 2.8% (worsened AQI) compared to previous years: 2020 (30), 2021 (25), 2022 (34), 2023 (27), 2024 (21).