Custer, Washington, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Custer, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd June):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 15 of Good air quality, showing improvement over 2025 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jun - 4th Jun 2026
Custer, Washington, United States
5 AM3rd Jun 2026
8 PM
4 AM4th Jun 2026
19AQI
10AQI
24AQI
8AQI
In the last 24 hours,
Custer's AQI reached its highest point of 24 at 4 AM during the Night, while the lowest point, 8, was recorded at 3 AM during the Night between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Custer, Washington, United States
13°C9/17°C
14°C11/20°C
13°C10/19°C
15°C8/22°C
15°C10/22°C
16°C9/23°C
20°C11/31°C
14°C11/18°C
12°C10/18°C
10°C7/13°C
10°C6/16°C
12°C7/20°C
14°C8/21°C
12°C8/18°C
12°C6/19°C
17°C9/25°C
18°C11/26°C
16°C11/21°C
15°C9/23°C
15°C12/18°C
13°C10/18°C
17°C10/25°C
19°C12/28°C
14°C11/20°C
13°C7/18°C
13°C7/23°C
19°C9/29°C
23°C15/30°C
19°C14/25°C
16°C12/21°C
37AQI
24AQI
28AQI
24AQI
2026 Days Vs Air Quality
Custer, Washington, United States
97%
146
3%
5
Total number of days with different AQI categories in last 155 days in 2026 (210 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2026, 97% of 155 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
Custer, Washington, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
48AQI (US)
43AQI (US)
15AQI (US)
16AQI (US)
18AQI (US)
11AQI (US)
14AQI (US)
17AQI (US)
17AQI (US)
15AQI (US)
18AQI (US)
14AQI (US)
16AQI (US)
19AQI (US)
20AQI (US)
17AQI (US)
31AQI (US)
42AQI (US)
40AQI (US)
40AQI (US)
29AQI (US)
33AQI (US)
37AQI (US)
34AQI (US)
26AQI (US)
26AQI (US)
20AQI (US)
20AQI (US)
47AQI (US)
44AQI (US)
45AQI (US)
51AQI (US)
41AQI (US)
44AQI (US)
29AQI (US)
29AQI (US)
28AQI (US)
25AQI (US)
33AQI (US)
27AQI (US)
31AQI (US)
25AQI (US)
20AQI (US)
29AQI (US)
37AQI (US)
31AQI (US)
36AQI (US)
39AQI (US)
32AQI (US)
32AQI (US)
28AQI (US)
25AQI (US)
30AQI (US)
32AQI (US)
31AQI (US)
36AQI (US)
34AQI (US)
20AQI (US)
20AQI (US)
26AQI (US)
30AQI (US)
26AQI (US)
39AQI (US)
36AQI (US)
36AQI (US)
43AQI (US)
42AQI (US)
37AQI (US)
32AQI (US)
41AQI (US)
42AQI (US)
36AQI (US)
26AQI (US)
34AQI (US)
34AQI (US)
36AQI (US)
32AQI (US)
32AQI (US)
40AQI (US)
38AQI (US)
33AQI (US)
18AQI (US)
30AQI (US)
28AQI (US)
33AQI (US)
24AQI (US)
19AQI (US)
26AQI (US)
27AQI (US)
21AQI (US)
31AQI (US)
35AQI (US)
23AQI (US)
29AQI (US)
22AQI (US)
22AQI (US)
21AQI (US)
19AQI (US)
21AQI (US)
22AQI (US)
25AQI (US)
18AQI (US)
34AQI (US)
37AQI (US)
34AQI (US)
23AQI (US)
21AQI (US)
15AQI (US)
15AQI (US)
17AQI (US)
19AQI (US)
18AQI (US)
17AQI (US)
19AQI (US)
19AQI (US)
16AQI (US)
17AQI (US)
22AQI (US)
22AQI (US)
19AQI (US)
23AQI (US)
25AQI (US)
25AQI (US)
16AQI (US)
14AQI (US)
20AQI (US)
29AQI (US)
21AQI (US)
23AQI (US)
16AQI (US)
26AQI (US)
40AQI (US)
51AQI (US)
54AQI (US)
56AQI (US)
55AQI (US)
42AQI (US)
38AQI (US)
37AQI (US)
37AQI (US)
39AQI (US)
41AQI (US)
22AQI (US)
12AQI (US)
13AQI (US)
13AQI (US)
12AQI (US)
14AQI (US)
20AQI (US)
14AQI (US)
15AQI (US)
27AQI (US)
31AQI (US)
32AQI (US)
23AQI (US)
29AQI (US)
16AQI (US)
No. of days
202628AQI (US)
Highest AQI (US) recorded in
March32AQI (US)
Lowest AQI (US) recorded in
June16AQI (US)
202529AQI (US)
Highest AQI (US) recorded in
September34AQI (US)
Lowest AQI (US) recorded in
March21AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Custer's annual 2026 AQI (US) (28) shows an average percentage change of -3.4% (improved AQI (US)) compared to previous years: 2025 (29).