Northwest Washington, Washington, District of Columbia, 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
Northwest Washington, Washington, District of Columbia, United States
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 33 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025
Northwest Washington, Washington, District of Columbia, United States
6 AM2nd Oct 2025
7 PM
5 AM3rd Oct 2025
43AQI
10AQI
42AQI
11AQI
In the last 24 hours,
Northwest Washington's AQI reached its highest point of 43 at 7 AM during the Day, while the lowest point, 10, was recorded at 6 PM during the Day between 2nd Oct and 3rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Northwest Washington, Washington, District of Columbia, United States
23°C16/30°C
24°C19/33°C
26°C19/34°C
27°C23/35°C
21°C16/27°C
19°C12/26°C
19°C12/26°C
18°C15/20°C
22°C18/27°C
23°C15/30°C
24°C16/31°C
25°C18/32°C
23°C18/27°C
20°C17/24°C
18°C16/19°C
24°C19/31°C
26°C17/33°C
21°C19/22°C
21°C18/26°C
20°C15/28°C
23°C17/33°C
23°C18/32°C
23°C21/29°C
23°C19/30°C
21°C18/24°C
23°C18/31°C
22°C17/30°C
22°C18/30°C
19°C15/26°C
16°C9/23°C
--°C/°C
32AQI
30AQI
33AQI
31AQI
2025 Days Vs Air Quality
Northwest Washington, Washington, District of Columbia, United States
88%
168
12%
22
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 276 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
Northwest Washington, Washington, District of Columbia, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI
34AQI
57AQI
40AQI
28AQI
21AQI
23AQI
34AQI
30AQI
39AQI
39AQI
23AQI
23AQI
21AQI
24AQI
27AQI
23AQI
22AQI
35AQI
34AQI
15AQI
20AQI
37AQI
57AQI
42AQI
31AQI
38AQI
30AQI
54AQI
37AQI
40AQI
13AQI
19AQI
34AQI
33AQI
41AQI
45AQI
40AQI
25AQI
26AQI
23AQI
20AQI
32AQI
23AQI
22AQI
32AQI
36AQI
23AQI
29AQI
34AQI
48AQI
29AQI
18AQI
22AQI
19AQI
18AQI
14AQI
13AQI
14AQI
17AQI
20AQI
28AQI
18AQI
20AQI
32AQI
34AQI
21AQI
24AQI
29AQI
48AQI
56AQI
51AQI
37AQI
46AQI
40AQI
43AQI
57AQI
63AQI
66AQI
49AQI
41AQI
24AQI
25AQI
38AQI
27AQI
23AQI
37AQI
41AQI
52AQI
56AQI
55AQI
48AQI
36AQI
26AQI
37AQI
38AQI
46AQI
29AQI
40AQI
54AQI
97AQI
54AQI
37AQI
42AQI
34AQI
33AQI
39AQI
41AQI
33AQI
32AQI
27AQI
29AQI
29AQI
29AQI
31AQI
26AQI
28AQI
42AQI
53AQI
41AQI
50AQI
40AQI
43AQI
34AQI
49AQI
53AQI
46AQI
28AQI
40AQI
45AQI
56AQI
67AQI
70AQI
69AQI
55AQI
36AQI
36AQI
38AQI
28AQI
29AQI
27AQI
43AQI
47AQI
46AQI
32AQI
20AQI
23AQI
19AQI
22AQI
28AQI
28AQI
25AQI
20AQI
21AQI
28AQI
28AQI
20AQI
29AQI
29AQI
24AQI
30AQI
30AQI
37AQI
53AQI
33AQI
22AQI
25AQI
22AQI
23AQI
32AQI
41AQI
47AQI
49AQI
38AQI
25AQI
25AQI
41AQI
37AQI
32AQI
26AQI
39AQI
48AQI
35AQI
21AQI
20AQI
24AQI
27AQI
27AQI
25AQI
33AQI
36AQI
31AQI
26AQI
41AQI
41AQI
36AQI
32AQI
29AQI
No. of days
202534AQI
Highest AQI recorded in
June41AQI
Lowest AQI recorded in
May26AQI
Most & Least Polluted Years Over the Last 1 Years
Northwest Washington's annual 2025 AQI (34) shows an average percentage change of NaN% (improved AQI) compared to previous years: .