Ruby St, Ellensburg, 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
Ruby St, Ellensburg, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (28th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 63 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 28th Sep - 29th Sep 2025
Ruby St, Ellensburg, Washington, United States
6 AM28th Sep 2025
7 PM
5 AM29th Sep 2025
98AQI
50AQI
81AQI
58AQI
In the last 24 hours,
Ruby St's AQI reached its highest point of 98 at 3 PM during the Day, while the lowest point, 50, was recorded at 9 AM during the Day between 28th Sep and 29th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ruby St, Ellensburg, Washington, United States
22°C11/34°C
25°C15/35°C
25°C18/33°C
27°C17/37°C
28°C17/40°C
27°C17/38°C
25°C15/36°C
24°C14/33°C
20°C12/29°C
19°C10/29°C
18°C11/27°C
18°C9/30°C
18°C10/30°C
18°C9/30°C
19°C10/30°C
13°C6/20°C
15°C5/24°C
17°C10/27°C
19°C11/30°C
17°C8/29°C
19°C9/31°C
19°C10/31°C
15°C9/20°C
15°C8/24°C
16°C7/26°C
17°C6/27°C
17°C12/23°C
16°C10/25°C
17°C9/26°C
17°C8/27°C
--°C/°C
64AQI
51AQI
61AQI
52AQI
2025 Days Vs Air Quality
Ruby St, Ellensburg, Washington, United States
90%
245
9%
24
0.7%
2
Total number of days with different AQI categories in last 272 days in 2025 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 90% of 272 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
Ruby St, Ellensburg, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
47AQI
37AQI
28AQI
24AQI
33AQI
27AQI
25AQI
24AQI
22AQI
22AQI
20AQI
24AQI
41AQI
48AQI
42AQI
28AQI
25AQI
36AQI
35AQI
32AQI
35AQI
42AQI
49AQI
43AQI
28AQI
40AQI
43AQI
44AQI
55AQI
62AQI
65AQI
25AQI
21AQI
26AQI
24AQI
23AQI
24AQI
26AQI
32AQI
30AQI
23AQI
25AQI
33AQI
32AQI
38AQI
29AQI
29AQI
35AQI
27AQI
30AQI
30AQI
30AQI
43AQI
35AQI
21AQI
19AQI
21AQI
30AQI
34AQI
34AQI
30AQI
20AQI
21AQI
19AQI
19AQI
18AQI
25AQI
25AQI
16AQI
17AQI
18AQI
17AQI
18AQI
17AQI
15AQI
15AQI
15AQI
20AQI
19AQI
16AQI
15AQI
16AQI
15AQI
19AQI
20AQI
17AQI
16AQI
16AQI
17AQI
16AQI
16AQI
16AQI
16AQI
19AQI
26AQI
33AQI
26AQI
14AQI
13AQI
19AQI
14AQI
16AQI
16AQI
23AQI
25AQI
19AQI
18AQI
20AQI
18AQI
15AQI
12AQI
13AQI
17AQI
28AQI
30AQI
28AQI
30AQI
19AQI
16AQI
15AQI
19AQI
23AQI
16AQI
13AQI
14AQI
17AQI
18AQI
14AQI
18AQI
24AQI
17AQI
14AQI
14AQI
17AQI
15AQI
13AQI
13AQI
15AQI
14AQI
11AQI
13AQI
16AQI
13AQI
17AQI
19AQI
17AQI
14AQI
16AQI
19AQI
14AQI
21AQI
14AQI
14AQI
15AQI
18AQI
19AQI
20AQI
20AQI
23AQI
28AQI
33AQI
33AQI
31AQI
24AQI
26AQI
19AQI
24AQI
26AQI
16AQI
16AQI
19AQI
14AQI
14AQI
28AQI
49AQI
39AQI
17AQI
14AQI
12AQI
16AQI
18AQI
22AQI
19AQI
16AQI
17AQI
22AQI
19AQI
18AQI
24AQI
16AQI
15AQI
18AQI
19AQI
18AQI
16AQI
22AQI
23AQI
31AQI
32AQI
21AQI
21AQI
23AQI
28AQI
31AQI
31AQI
19AQI
17AQI
16AQI
21AQI
21AQI
26AQI
29AQI
35AQI
40AQI
38AQI
34AQI
46AQI
27AQI
16AQI
16AQI
17AQI
23AQI
21AQI
22AQI
32AQI
24AQI
23AQI
12AQI
14AQI
18AQI
19AQI
19AQI
20AQI
25AQI
33AQI
45AQI
49AQI
55AQI
55AQI
55AQI
54AQI
51AQI
52AQI
59AQI
62AQI
69AQI
73AQI
121AQI
131AQI
84AQI
54AQI
44AQI
51AQI
60AQI
54AQI
55AQI
43AQI
24AQI
27AQI
33AQI
32AQI
42AQI
45AQI
44AQI
30AQI
54AQI
47AQI
64AQI
51AQI
66AQI
63AQI
36AQI
28AQI
19AQI
20AQI
16AQI
22AQI
22AQI
32AQI
57AQI
No. of days
202528AQI
Highest AQI recorded in
September57AQI
Lowest AQI recorded in
May16AQI
202421AQI
Highest AQI recorded in
December30AQI
Lowest AQI recorded in
April13AQI
202325AQI
Highest AQI recorded in
August42AQI
Lowest AQI recorded in
April15AQI
202228AQI
Highest AQI recorded in
January48AQI
Lowest AQI recorded in
May12AQI
202124AQI
Highest AQI recorded in
August46AQI
Lowest AQI recorded in
May14AQI
202032AQI
Highest AQI recorded in
September85AQI
Lowest AQI recorded in
June17AQI
Most & Least Polluted Years Over the Last 6 Years
Ruby St's annual 2025 AQI (28) shows an average percentage change of 8.07% (worsened AQI) compared to previous years: 2020 (32), 2021 (24), 2022 (28), 2023 (25), 2024 (21).