Philadelphia, Pennsylvania, 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
Philadelphia, Pennsylvania, United States
AQI Trends: Highest and Lowest
Same Day Analysis (5th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 45 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Sep - 7th Sep 2025
Philadelphia, Pennsylvania, United States
6 AM6th Sep 2025
7 PM
5 AM7th Sep 2025
60AQI
52AQI
58AQI
55AQI
In the last 24 hours,
Philadelphia's AQI reached its highest point of 60 at 3 PM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 6th Sep and 7th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Philadelphia, Pennsylvania, United States
23°C17/31°C
25°C16/33°C
25°C18/34°C
25°C20/32°C
26°C22/33°C
28°C24/35°C
27°C23/31°C
29°C24/34°C
28°C23/35°C
28°C22/36°C
21°C19/21°C
22°C19/26°C
21°C19/25°C
20°C17/23°C
23°C16/32°C
23°C16/31°C
24°C17/31°C
25°C21/31°C
22°C16/29°C
21°C15/25°C
21°C14/26°C
22°C17/26°C
20°C13/27°C
22°C14/29°C
22°C16/26°C
21°C16/25°C
22°C17/29°C
23°C16/32°C
25°C18/31°C
27°C22/35°C
--°C/°C
36AQI
34AQI
35AQI
33AQI
2025 Days Vs Air Quality
Philadelphia, Pennsylvania, United States
83%
135
17%
28
Total number of days with different AQI categories in last 250 days in 2025 (115 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 250 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
Philadelphia, Pennsylvania, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI
42AQI
59AQI
52AQI
41AQI
23AQI
25AQI
40AQI
35AQI
29AQI
39AQI
27AQI
33AQI
24AQI
29AQI
29AQI
17AQI
21AQI
35AQI
39AQI
16AQI
24AQI
41AQI
55AQI
34AQI
30AQI
41AQI
30AQI
59AQI
37AQI
38AQI
14AQI
21AQI
33AQI
39AQI
28AQI
47AQI
49AQI
33AQI
28AQI
27AQI
22AQI
36AQI
27AQI
22AQI
39AQI
42AQI
31AQI
32AQI
37AQI
43AQI
39AQI
23AQI
24AQI
20AQI
21AQI
17AQI
22AQI
16AQI
17AQI
22AQI
32AQI
23AQI
22AQI
40AQI
35AQI
21AQI
28AQI
36AQI
50AQI
55AQI
56AQI
47AQI
35AQI
33AQI
41AQI
56AQI
64AQI
71AQI
74AQI
42AQI
41AQI
37AQI
34AQI
38AQI
31AQI
50AQI
52AQI
56AQI
58AQI
57AQI
49AQI
46AQI
40AQI
50AQI
49AQI
38AQI
34AQI
50AQI
51AQI
69AQI
55AQI
38AQI
40AQI
39AQI
40AQI
38AQI
33AQI
25AQI
28AQI
27AQI
39AQI
34AQI
29AQI
31AQI
34AQI
36AQI
50AQI
39AQI
38AQI
49AQI
48AQI
83AQI
46AQI
56AQI
59AQI
58AQI
44AQI
52AQI
54AQI
65AQI
78AQI
74AQI
54AQI
34AQI
38AQI
41AQI
51AQI
46AQI
37AQI
37AQI
48AQI
50AQI
50AQI
34AQI
24AQI
20AQI
18AQI
28AQI
34AQI
30AQI
30AQI
21AQI
22AQI
34AQI
33AQI
21AQI
26AQI
36AQI
31AQI
34AQI
30AQI
45AQI
43AQI
32AQI
30AQI
47AQI
43AQI
40AQI
35AQI
No. of days
202538AQI
Highest AQI recorded in
June47AQI
Lowest AQI recorded in
May30AQI
Most & Least Polluted Years Over the Last 1 Years
Philadelphia's annual 2025 AQI (38) shows an average percentage change of NaN% (improved AQI) compared to previous years: .