Port Angeles, 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
Port Angeles, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (13th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 27 of Good air quality, showing improvement over 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Oct - 14th Oct 2025
Port Angeles, Washington, United States
7 AM13th Oct 2025
6 PM
6 AM14th Oct 2025
45AQI
12AQI
58AQI
35AQI
In the last 24 hours,
Port Angeles's AQI reached its highest point of 58 at 3 AM during the Night, while the lowest point, 12, was recorded at 10 AM during the Day between 13th Oct and 14th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Port Angeles, Washington, United States
14°C11/18°C
13°C8/16°C
16°C11/22°C
15°C12/18°C
14°C10/18°C
17°C12/21°C
16°C14/18°C
15°C11/19°C
14°C10/19°C
15°C9/23°C
14°C10/19°C
13°C9/18°C
14°C10/18°C
15°C12/20°C
13°C11/16°C
13°C11/14°C
13°C11/18°C
13°C10/19°C
14°C11/19°C
12°C10/14°C
13°C11/15°C
13°C9/20°C
13°C8/19°C
12°C8/20°C
10°C7/14°C
10°C8/13°C
12°C9/15°C
10°C8/13°C
9°C7/11°C
10°C6/14°C
--°C/°C
30AQI
23AQI
34AQI
26AQI
2025 Days Vs Air Quality
Port Angeles, Washington, United States
100%
285
0.3%
1
Total number of days with different AQI categories in last 287 days in 2025 (78 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 287 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
Port Angeles, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
38AQI
28AQI
38AQI
28AQI
21AQI
30AQI
42AQI
34AQI
27AQI
26AQI
38AQI
37AQI
45AQI
41AQI
33AQI
37AQI
41AQI
42AQI
41AQI
44AQI
47AQI
44AQI
37AQI
36AQI
45AQI
42AQI
46AQI
53AQI
42AQI
32AQI
21AQI
35AQI
35AQI
21AQI
24AQI
27AQI
40AQI
35AQI
38AQI
27AQI
26AQI
40AQI
32AQI
33AQI
29AQI
30AQI
30AQI
30AQI
23AQI
26AQI
28AQI
32AQI
22AQI
29AQI
19AQI
24AQI
26AQI
33AQI
33AQI
36AQI
19AQI
20AQI
22AQI
20AQI
22AQI
29AQI
25AQI
21AQI
26AQI
23AQI
18AQI
24AQI
20AQI
19AQI
21AQI
17AQI
22AQI
17AQI
20AQI
18AQI
22AQI
21AQI
25AQI
30AQI
21AQI
18AQI
21AQI
25AQI
21AQI
21AQI
21AQI
20AQI
27AQI
36AQI
31AQI
18AQI
23AQI
19AQI
26AQI
19AQI
17AQI
23AQI
24AQI
25AQI
22AQI
23AQI
23AQI
23AQI
17AQI
16AQI
19AQI
22AQI
26AQI
35AQI
34AQI
32AQI
19AQI
20AQI
18AQI
24AQI
24AQI
16AQI
16AQI
19AQI
21AQI
19AQI
20AQI
21AQI
19AQI
20AQI
16AQI
23AQI
22AQI
24AQI
23AQI
19AQI
16AQI
19AQI
17AQI
17AQI
17AQI
17AQI
18AQI
17AQI
17AQI
17AQI
20AQI
18AQI
21AQI
21AQI
21AQI
24AQI
27AQI
16AQI
20AQI
25AQI
25AQI
24AQI
32AQI
40AQI
40AQI
34AQI
23AQI
22AQI
22AQI
19AQI
19AQI
17AQI
17AQI
19AQI
19AQI
21AQI
22AQI
31AQI
26AQI
18AQI
17AQI
21AQI
23AQI
26AQI
20AQI
19AQI
18AQI
19AQI
21AQI
19AQI
19AQI
19AQI
16AQI
18AQI
20AQI
18AQI
24AQI
20AQI
23AQI
29AQI
34AQI
28AQI
23AQI
21AQI
23AQI
21AQI
19AQI
19AQI
17AQI
20AQI
22AQI
22AQI
22AQI
20AQI
18AQI
19AQI
19AQI
25AQI
33AQI
28AQI
28AQI
17AQI
19AQI
20AQI
24AQI
27AQI
26AQI
26AQI
23AQI
19AQI
15AQI
19AQI
22AQI
23AQI
19AQI
23AQI
25AQI
28AQI
36AQI
47AQI
41AQI
36AQI
31AQI
39AQI
31AQI
38AQI
35AQI
33AQI
50AQI
28AQI
43AQI
33AQI
27AQI
29AQI
35AQI
31AQI
31AQI
21AQI
26AQI
26AQI
21AQI
26AQI
42AQI
26AQI
23AQI
26AQI
25AQI
27AQI
27AQI
35AQI
20AQI
27AQI
30AQI
18AQI
20AQI
17AQI
20AQI
18AQI
37AQI
45AQI
29AQI
42AQI
39AQI
29AQI
36AQI
44AQI
34AQI
34AQI
27AQI
38AQI
29AQI
22AQI
23AQI
19AQI
24AQI
21AQI
27AQI
29AQI
33AQI
No. of days
202526AQI
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
May19AQI
202424AQI
Highest AQI recorded in
December35AQI
Lowest AQI recorded in
June17AQI
202329AQI
Highest AQI recorded in
November47AQI
Lowest AQI recorded in
July18AQI
202229AQI
Highest AQI recorded in
November46AQI
Lowest AQI recorded in
July17AQI
202125AQI
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
July16AQI
202031AQI
Highest AQI recorded in
September70AQI
Lowest AQI recorded in
June15AQI
Most & Least Polluted Years Over the Last 6 Years
Port Angeles's annual 2025 AQI (26) shows an average percentage change of -4.2% (improved AQI) compared to previous years: 2020 (31), 2021 (25), 2022 (29), 2023 (29), 2024 (24).