San Juan Avenue, Port Townsend, 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
San Juan Avenue, Port Townsend, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 50 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
San Juan Avenue, Port Townsend, Washington, United States
7 AM18th Oct 2025
6 PM
6 AM19th Oct 2025
56AQI
38AQI
55AQI
37AQI
In the last 24 hours,
San Juan Avenue's AQI reached its highest point of 56 at 10 AM during the Day, while the lowest point, 37, was recorded at 10 PM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
San Juan Avenue, Port Townsend, Washington, United States
14°C10/16°C
14°C11/16°C
14°C12/17°C
13°C11/17°C
14°C11/19°C
14°C11/17°C
13°C11/16°C
13°C11/17°C
14°C12/18°C
13°C11/19°C
14°C12/16°C
14°C12/17°C
14°C12/17°C
14°C12/18°C
12°C10/13°C
12°C11/14°C
13°C11/17°C
13°C10/16°C
12°C10/16°C
11°C11/15°C
12°C10/15°C
12°C10/15°C
11°C10/13°C
11°C9/12°C
11°C9/15°C
11°C8/14°C
11°C8/14°C
10°C8/14°C
12°C10/15°C
11°C9/14°C
--°C/°C
37AQI
37AQI
39AQI
37AQI
2025 Days Vs Air Quality
San Juan Avenue, Port Townsend, Washington, United States
99%
205
0.9%
2
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 292 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
San Juan Avenue, Port Townsend, Washington, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
17AQI
16AQI
16AQI
18AQI
17AQI
18AQI
19AQI
18AQI
22AQI
25AQI
23AQI
16AQI
14AQI
15AQI
17AQI
18AQI
17AQI
18AQI
18AQI
19AQI
21AQI
19AQI
22AQI
22AQI
19AQI
16AQI
16AQI
17AQI
22AQI
26AQI
28AQI
25AQI
18AQI
17AQI
15AQI
19AQI
22AQI
15AQI
15AQI
16AQI
18AQI
17AQI
16AQI
16AQI
16AQI
16AQI
15AQI
19AQI
18AQI
19AQI
18AQI
17AQI
15AQI
16AQI
13AQI
14AQI
14AQI
15AQI
15AQI
16AQI
15AQI
15AQI
17AQI
15AQI
17AQI
17AQI
20AQI
18AQI
20AQI
16AQI
17AQI
20AQI
20AQI
20AQI
25AQI
28AQI
32AQI
28AQI
21AQI
20AQI
19AQI
16AQI
17AQI
15AQI
16AQI
17AQI
18AQI
20AQI
21AQI
22AQI
22AQI
15AQI
14AQI
15AQI
17AQI
19AQI
17AQI
16AQI
16AQI
17AQI
18AQI
18AQI
18AQI
18AQI
16AQI
17AQI
18AQI
17AQI
20AQI
19AQI
21AQI
25AQI
31AQI
27AQI
22AQI
20AQI
22AQI
21AQI
20AQI
19AQI
17AQI
20AQI
23AQI
21AQI
21AQI
19AQI
18AQI
19AQI
18AQI
23AQI
30AQI
32AQI
26AQI
17AQI
18AQI
20AQI
22AQI
25AQI
25AQI
25AQI
22AQI
17AQI
15AQI
18AQI
21AQI
22AQI
19AQI
22AQI
25AQI
28AQI
37AQI
43AQI
37AQI
32AQI
28AQI
34AQI
30AQI
33AQI
30AQI
30AQI
40AQI
26AQI
37AQI
30AQI
28AQI
29AQI
31AQI
29AQI
28AQI
21AQI
27AQI
19AQI
16AQI
17AQI
24AQI
23AQI
22AQI
22AQI
20AQI
20AQI
26AQI
27AQI
18AQI
21AQI
32AQI
15AQI
17AQI
15AQI
29AQI
40AQI
48AQI
48AQI
50AQI
48AQI
51AQI
50AQI
50AQI
48AQI
49AQI
50AQI
48AQI
49AQI
49AQI
50AQI
54AQI
50AQI
18AQI
19AQI
16AQI
20AQI
20AQI
25AQI
25AQI
48AQI
No. of days
202523AQI
Highest AQI recorded in
October48AQI
Lowest AQI recorded in
May16AQI
Most & Least Polluted Years Over the Last 1 Years
San Juan Avenue's annual 2025 AQI (23) shows an average percentage change of NaN% (improved AQI) compared to previous years: .