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!
October Air Quality Analysis
Chelan, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 43 of Good air quality, showing improvement over 2025 and 2022 on the same day.
Day & Night AQI Trend: 2nd Oct - 3rd Oct 2026
Chelan, Washington, United States
6 AM2nd Oct 2026
7 PM
5 AM3rd Oct 2026
54AQI
27AQI
60AQI
33AQI
In the last 24 hours,
Chelan's AQI reached its highest point of 60 at 12 AM during the Night, while the lowest point, 27, was recorded at 8 AM during the Day between 2nd Oct and 3rd Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Chelan, Washington, United States
17°C11/23°C
17°C11/24°C
17°C10/24°C
18°C13/24°C
20°C13/28°C
23°C16/31°C
22°C16/28°C
19°C14/25°C
20°C15/26°C
8°C7/10°C
13°C7/16°C
13°C10/16°C
15°C9/20°C
18°C13/23°C
19°C14/23°C
19°C14/24°C
19°C15/24°C
20°C15/25°C
16°C12/22°C
15°C10/19°C
15°C10/19°C
12°C7/18°C
10°C4/15°C
11°C7/15°C
13°C8/19°C
11°C9/14°C
12°C7/16°C
16°C11/22°C
19°C13/27°C
16°C9/22°C
49AQI
42AQI
47AQI
42AQI
2026 Days Vs Air Quality
Chelan, Washington, United States
81%
221
17%
47
0.7%
2
1%
3
Total number of days with different AQI categories in last 276 days in 2026 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 81%
Health Risk Level:
Low
In 2026, 81% of 276 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Chelan, Washington, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI (US)
28AQI (US)
30AQI (US)
18AQI (US)
20AQI (US)
22AQI (US)
12AQI (US)
15AQI (US)
16AQI (US)
25AQI (US)
27AQI (US)
27AQI (US)
28AQI (US)
24AQI (US)
16AQI (US)
15AQI (US)
20AQI (US)
18AQI (US)
21AQI (US)
13AQI (US)
23AQI (US)
51AQI (US)
55AQI (US)
48AQI (US)
50AQI (US)
45AQI (US)
36AQI (US)
42AQI (US)
48AQI (US)
48AQI (US)
40AQI (US)
52AQI (US)
50AQI (US)
48AQI (US)
45AQI (US)
49AQI (US)
37AQI (US)
34AQI (US)
41AQI (US)
44AQI (US)
30AQI (US)
31AQI (US)
29AQI (US)
36AQI (US)
36AQI (US)
32AQI (US)
40AQI (US)
31AQI (US)
32AQI (US)
31AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
33AQI (US)
38AQI (US)
28AQI (US)
28AQI (US)
27AQI (US)
27AQI (US)
29AQI (US)
45AQI (US)
34AQI (US)
38AQI (US)
30AQI (US)
22AQI (US)
38AQI (US)
33AQI (US)
34AQI (US)
30AQI (US)
35AQI (US)
33AQI (US)
40AQI (US)
34AQI (US)
28AQI (US)
24AQI (US)
24AQI (US)
28AQI (US)
30AQI (US)
39AQI (US)
40AQI (US)
32AQI (US)
32AQI (US)
34AQI (US)
25AQI (US)
22AQI (US)
18AQI (US)
22AQI (US)
19AQI (US)
23AQI (US)
17AQI (US)
23AQI (US)
26AQI (US)
20AQI (US)
27AQI (US)
24AQI (US)
22AQI (US)
18AQI (US)
22AQI (US)
21AQI (US)
25AQI (US)
29AQI (US)
22AQI (US)
24AQI (US)
25AQI (US)
32AQI (US)
27AQI (US)
20AQI (US)
19AQI (US)
20AQI (US)
20AQI (US)
21AQI (US)
21AQI (US)
22AQI (US)
29AQI (US)
17AQI (US)
20AQI (US)
20AQI (US)
23AQI (US)
22AQI (US)
21AQI (US)
21AQI (US)
31AQI (US)
28AQI (US)
19AQI (US)
17AQI (US)
23AQI (US)
25AQI (US)
17AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
45AQI (US)
52AQI (US)
57AQI (US)
52AQI (US)
47AQI (US)
50AQI (US)
34AQI (US)
40AQI (US)
40AQI (US)
40AQI (US)
42AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
31AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
25AQI (US)
24AQI (US)
24AQI (US)
27AQI (US)
30AQI (US)
27AQI (US)
25AQI (US)
27AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
25AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
26AQI (US)
28AQI (US)
33AQI (US)
31AQI (US)
29AQI (US)
30AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
43AQI (US)
42AQI (US)
43AQI (US)
58AQI (US)
80AQI (US)
84AQI (US)
74AQI (US)
60AQI (US)
81AQI (US)
50AQI (US)
50AQI (US)
54AQI (US)
45AQI (US)
49AQI (US)
62AQI (US)
71AQI (US)
66AQI (US)
113AQI (US)
170AQI (US)
173AQI (US)
154AQI (US)
100AQI (US)
65AQI (US)
102AQI (US)
54AQI (US)
59AQI (US)
90AQI (US)
92AQI (US)
92AQI (US)
91AQI (US)
80AQI (US)
72AQI (US)
80AQI (US)
66AQI (US)
71AQI (US)
89AQI (US)
88AQI (US)
58AQI (US)
65AQI (US)
54AQI (US)
80AQI (US)
59AQI (US)
55AQI (US)
54AQI (US)
56AQI (US)
53AQI (US)
72AQI (US)
55AQI (US)
44AQI (US)
40AQI (US)
42AQI (US)
46AQI (US)
41AQI (US)
40AQI (US)
49AQI (US)
51AQI (US)
45AQI (US)
53AQI (US)
36AQI (US)
34AQI (US)
41AQI (US)
44AQI (US)
49AQI (US)
47AQI (US)
50AQI (US)
47AQI (US)
55AQI (US)
47AQI (US)
52AQI (US)
50AQI (US)
51AQI (US)
28AQI (US)
39AQI (US)
49AQI (US)
48AQI (US)
45AQI (US)
41AQI (US)
45AQI (US)
43AQI (US)
30AQI (US)
35AQI (US)
30AQI (US)
23AQI (US)
32AQI (US)
26AQI (US)
43AQI (US)
83AQI (US)
46AQI (US)
43AQI (US)
No. of days
202639AQI (US)
Highest AQI (US) recorded in
August83AQI (US)
Lowest AQI (US) recorded in
April23AQI (US)
202528AQI (US)
Highest AQI (US) recorded in
September65AQI (US)
Lowest AQI (US) recorded in
May15AQI (US)
202422AQI (US)
Highest AQI (US) recorded in
July61AQI (US)
Lowest AQI (US) recorded in
May8AQI (US)
202323AQI (US)
Highest AQI (US) recorded in
August60AQI (US)
Lowest AQI (US) recorded in
April11AQI (US)
202223AQI (US)
Highest AQI (US) recorded in
October48AQI (US)
Lowest AQI (US) recorded in
June10AQI (US)
202119AQI (US)
Highest AQI (US) recorded in
August48AQI (US)
Lowest AQI (US) recorded in
October9AQI (US)
202028AQI (US)
Highest AQI (US) recorded in
September102AQI (US)
Lowest AQI (US) recorded in
June9AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Chelan's annual 2026 AQI (US) (39) shows an average percentage change of 66.7% (worsened AQI (US)) compared to previous years: 2020 (28), 2021 (19), 2022 (23), 2023 (23), 2024 (22), 2025 (28).