Chelan, Washington, 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
Chelan, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (24th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 39 of Good air quality, showing improvement over 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 23rd Aug - 24th Aug 2025
Chelan, Washington, United States
5 AM23rd Aug 2025
8 PM
4 AM24th Aug 2025
26AQI
22AQI
44AQI
25AQI
In the last 24 hours,
Chelan's AQI reached its highest point of 44 at 1 AM during the Night, while the lowest point, 22, was recorded at 3 PM during the Day between 23rd Aug and 24th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Chelan, Washington, United States
--°C/°C
18°C9/28°C
20°C10/29°C
22°C12/31°C
25°C14/35°C
26°C15/37°C
25°C17/36°C
24°C15/33°C
22°C13/32°C
20°C11/31°C
19°C10/29°C
20°C11/28°C
18°C12/25°C
16°C11/23°C
19°C8/29°C
21°C11/31°C
25°C14/35°C
24°C14/33°C
26°C18/36°C
22°C14/32°C
20°C11/29°C
19°C14/26°C
19°C13/26°C
18°C7/27°C
20°C15/28°C
20°C12/28°C
20°C12/28°C
21°C12/30°C
24°C15/32°C
26°C17/35°C
27°C19/36°C
25AQI
21AQI
23AQI
21AQI
2025 Days Vs Air Quality
Chelan, Washington, United States
99%
234
0.8%
2
Total number of days with different AQI categories in last 237 days in 2025 (128 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 237 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
Chelan, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
33AQI
31AQI
26AQI
23AQI
22AQI
23AQI
25AQI
23AQI
24AQI
26AQI
23AQI
26AQI
27AQI
32AQI
35AQI
30AQI
28AQI
30AQI
28AQI
30AQI
30AQI
37AQI
39AQI
37AQI
25AQI
31AQI
31AQI
37AQI
41AQI
47AQI
52AQI
26AQI
20AQI
22AQI
21AQI
21AQI
31AQI
26AQI
28AQI
29AQI
24AQI
23AQI
29AQI
27AQI
24AQI
25AQI
28AQI
27AQI
26AQI
28AQI
24AQI
23AQI
36AQI
27AQI
19AQI
19AQI
20AQI
21AQI
25AQI
24AQI
24AQI
20AQI
19AQI
18AQI
17AQI
18AQI
22AQI
21AQI
16AQI
18AQI
19AQI
18AQI
16AQI
16AQI
15AQI
16AQI
14AQI
18AQI
16AQI
14AQI
15AQI
15AQI
15AQI
21AQI
19AQI
17AQI
16AQI
14AQI
16AQI
16AQI
16AQI
16AQI
16AQI
17AQI
18AQI
22AQI
20AQI
12AQI
13AQI
15AQI
14AQI
16AQI
17AQI
20AQI
33AQI
21AQI
18AQI
19AQI
20AQI
15AQI
13AQI
12AQI
25AQI
37AQI
29AQI
27AQI
26AQI
18AQI
14AQI
13AQI
17AQI
19AQI
17AQI
13AQI
13AQI
16AQI
17AQI
14AQI
16AQI
19AQI
14AQI
13AQI
13AQI
14AQI
14AQI
12AQI
12AQI
12AQI
14AQI
10AQI
11AQI
14AQI
14AQI
17AQI
19AQI
15AQI
14AQI
15AQI
15AQI
13AQI
18AQI
11AQI
13AQI
15AQI
15AQI
17AQI
17AQI
17AQI
19AQI
25AQI
22AQI
24AQI
27AQI
19AQI
17AQI
18AQI
24AQI
30AQI
16AQI
18AQI
16AQI
11AQI
13AQI
40AQI
53AQI
47AQI
18AQI
13AQI
12AQI
15AQI
17AQI
23AQI
21AQI
18AQI
17AQI
19AQI
19AQI
21AQI
22AQI
18AQI
14AQI
17AQI
18AQI
17AQI
18AQI
24AQI
24AQI
27AQI
27AQI
23AQI
20AQI
22AQI
25AQI
26AQI
29AQI
17AQI
16AQI
18AQI
18AQI
18AQI
23AQI
23AQI
30AQI
28AQI
30AQI
26AQI
28AQI
24AQI
17AQI
18AQI
18AQI
25AQI
22AQI
22AQI
29AQI
34AQI
33AQI
14AQI
14AQI
17AQI
19AQI
17AQI
18AQI
23AQI
27AQI
39AQI
31AQI
25AQI
18AQI
19AQI
15AQI
21AQI
21AQI
24AQI
No. of days
202521AQI
Highest AQI recorded in
January31AQI
Lowest AQI recorded in
May15AQI
202422AQI
Highest AQI recorded in
July61AQI
Lowest AQI recorded in
May8AQI
202323AQI
Highest AQI recorded in
August60AQI
Lowest AQI recorded in
April11AQI
202223AQI
Highest AQI recorded in
October48AQI
Lowest AQI recorded in
June10AQI
202119AQI
Highest AQI recorded in
August48AQI
Lowest AQI recorded in
May9AQI
202028AQI
Highest AQI recorded in
September102AQI
Lowest AQI recorded in
June9AQI
Most & Least Polluted Years Over the Last 6 Years
Chelan's annual 2025 AQI (21) shows an average percentage change of -4.5% (improved AQI) compared to previous years: 2020 (28), 2021 (19), 2022 (23), 2023 (23), 2024 (22).