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!
August Air Quality Analysis
Northwest Washington, Washington, District of Columbia, United States
AQI Trends: Highest and Lowest
Same Day Analysis (10th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 37 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Northwest Washington, Washington, District of Columbia, United States
6 AM10th Aug 2025
8 PM
5 AM11th Aug 2025
37AQI
32AQI
42AQI
34AQI
In the last 24 hours,
Northwest Washington's AQI reached its highest point of 42 at 1 AM during the Night, while the lowest point, 32, was recorded at 6 PM during the Day between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Northwest Washington, Washington, District of Columbia, United States
29°C24/34°C
28°C24/35°C
27°C24/32°C
27°C22/32°C
26°C24/31°C
30°C23/38°C
28°C24/33°C
27°C24/31°C
28°C24/34°C
27°C22/32°C
26°C20/33°C
26°C22/32°C
28°C21/35°C
31°C24/39°C
30°C24/37°C
30°C25/36°C
31°C24/37°C
31°C24/38°C
31°C26/37°C
29°C22/34°C
21°C19/23°C
22°C17/27°C
23°C16/28°C
25°C16/33°C
25°C19/30°C
23°C22/26°C
24°C20/28°C
23°C19/30°C
24°C18/32°C
25°C17/33°C
--°C/°C
42AQI
42AQI
43AQI
41AQI
2025 Days Vs Air Quality
Northwest Washington, Washington, District of Columbia, United States
85%
116
15%
21
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 223 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
37AQI
36AQI
31AQI
26AQI
41AQI
41AQI
50AQI
No. of days
202536AQI
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
May26AQI
Most & Least Polluted Years Over the Last 1 Years
Northwest Washington's annual 2025 AQI (36) shows an average percentage change of NaN% (improved AQI) compared to previous years: .