Rosalia, 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
Rosalia, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 54 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
Rosalia, Washington, United States
6 AM29th Sep 2025
7 PM
5 AM30th Sep 2025
67AQI
40AQI
70AQI
61AQI
In the last 24 hours,
Rosalia's AQI reached its highest point of 70 at 1 AM during the Night, while the lowest point, 40, was recorded at 6 AM during the Day between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Rosalia, Washington, United States
27°C17/37°C
28°C18/38°C
29°C19/39°C
28°C18/38°C
26°C16/35°C
24°C15/33°C
24°C16/34°C
23°C14/31°C
22°C13/30°C
22°C15/29°C
21°C12/30°C
21°C16/30°C
19°C13/25°C
21°C12/29°C
15°C13/19°C
12°C10/15°C
18°C9/28°C
22°C13/31°C
22°C13/31°C
23°C14/31°C
22°C15/30°C
15°C9/21°C
13°C6/21°C
17°C9/27°C
20°C11/28°C
19°C11/27°C
13°C6/20°C
16°C8/26°C
20°C12/28°C
18°C12/26°C
--°C/°C
56AQI
56AQI
60AQI
57AQI
2025 Days Vs Air Quality
Rosalia, Washington, United States
86%
161
14%
26
0.5%
1
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 273 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
Rosalia, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
24AQI
18AQI
16AQI
14AQI
17AQI
16AQI
16AQI
17AQI
16AQI
17AQI
18AQI
22AQI
20AQI
13AQI
12AQI
17AQI
17AQI
17AQI
17AQI
26AQI
26AQI
24AQI
15AQI
18AQI
17AQI
19AQI
12AQI
15AQI
23AQI
31AQI
26AQI
33AQI
35AQI
23AQI
16AQI
18AQI
18AQI
23AQI
21AQI
14AQI
14AQI
22AQI
19AQI
15AQI
21AQI
24AQI
17AQI
14AQI
15AQI
16AQI
17AQI
14AQI
13AQI
14AQI
14AQI
12AQI
12AQI
16AQI
18AQI
20AQI
24AQI
21AQI
14AQI
19AQI
19AQI
14AQI
20AQI
17AQI
13AQI
15AQI
17AQI
21AQI
21AQI
20AQI
23AQI
25AQI
26AQI
39AQI
48AQI
25AQI
20AQI
21AQI
22AQI
24AQI
19AQI
19AQI
21AQI
15AQI
16AQI
26AQI
43AQI
36AQI
22AQI
16AQI
12AQI
14AQI
19AQI
23AQI
23AQI
22AQI
19AQI
24AQI
21AQI
22AQI
22AQI
21AQI
16AQI
24AQI
25AQI
22AQI
19AQI
21AQI
33AQI
36AQI
28AQI
31AQI
35AQI
24AQI
39AQI
36AQI
35AQI
23AQI
17AQI
20AQI
17AQI
20AQI
25AQI
34AQI
43AQI
52AQI
47AQI
32AQI
31AQI
31AQI
18AQI
16AQI
18AQI
21AQI
26AQI
27AQI
44AQI
48AQI
22AQI
14AQI
16AQI
22AQI
25AQI
26AQI
24AQI
37AQI
57AQI
51AQI
51AQI
54AQI
59AQI
59AQI
55AQI
55AQI
64AQI
62AQI
65AQI
74AQI
74AQI
86AQI
101AQI
62AQI
52AQI
52AQI
65AQI
55AQI
51AQI
59AQI
46AQI
25AQI
33AQI
42AQI
47AQI
37AQI
49AQI
36AQI
28AQI
46AQI
45AQI
46AQI
80AQI
87AQI
78AQI
54AQI
18AQI
20AQI
17AQI
23AQI
25AQI
37AQI
56AQI
No. of days
202529AQI
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
May17AQI
Most & Least Polluted Years Over the Last 1 Years
Rosalia's annual 2025 AQI (29) shows an average percentage change of NaN% (improved AQI) compared to previous years: .