Longgang, Shenzhen, Guangdong Province, China 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
Longgang, Shenzhen, Guangdong Province, China
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 38 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Sep - 22nd Sep 2025
Longgang, Shenzhen, Guangdong Province, China
6 AM21st Sep 2025
6 PM
5 AM22nd Sep 2025
40AQI
18AQI
45AQI
27AQI
In the last 24 hours,
Longgang's AQI reached its highest point of 45 at 2 AM during the Night, while the lowest point, 18, was recorded at 9 AM during the Day between 21st Sep and 22nd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Longgang, Shenzhen, Guangdong Province, China
29°C27/33°C
28°C26/31°C
28°C26/32°C
29°C26/32°C
28°C26/31°C
28°C26/32°C
29°C27/33°C
29°C27/31°C
28°C26/32°C
29°C26/32°C
29°C26/32°C
29°C26/32°C
29°C26/32°C
29°C27/32°C
30°C27/33°C
28°C25/30°C
26°C25/27°C
27°C26/28°C
28°C26/31°C
28°C26/32°C
28°C26/32°C
29°C26/32°C
28°C26/32°C
29°C26/32°C
29°C27/32°C
29°C26/33°C
28°C25/32°C
26°C25/29°C
25°C24/25°C
27°C24/30°C
--°C/°C
46AQI
43AQI
47AQI
46AQI
2025 Days Vs Air Quality
Longgang, Shenzhen, Guangdong Province, China
72%
84
28%
32
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 72%
Health Risk Level:
Low
In 2025, 72% of 265 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
Longgang, Shenzhen, Guangdong Province, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
44AQI
47AQI
58AQI
58AQI
52AQI
50AQI
54AQI
56AQI
55AQI
49AQI
46AQI
48AQI
44AQI
37AQI
37AQI
39AQI
45AQI
45AQI
45AQI
41AQI
38AQI
34AQI
34AQI
28AQI
23AQI
25AQI
28AQI
28AQI
27AQI
28AQI
26AQI
27AQI
27AQI
29AQI
32AQI
40AQI
47AQI
45AQI
47AQI
56AQI
41AQI
51AQI
44AQI
48AQI
46AQI
53AQI
54AQI
52AQI
54AQI
59AQI
55AQI
60AQI
36AQI
39AQI
40AQI
38AQI
50AQI
61AQI
63AQI
63AQI
62AQI
61AQI
63AQI
55AQI
56AQI
55AQI
54AQI
54AQI
50AQI
45AQI
52AQI
58AQI
54AQI
40AQI
42AQI
52AQI
55AQI
47AQI
40AQI
46AQI
45AQI
37AQI
39AQI
40AQI
41AQI
42AQI
48AQI
46AQI
43AQI
47AQI
50AQI
53AQI
50AQI
50AQI
48AQI
48AQI
49AQI
48AQI
39AQI
44AQI
50AQI
49AQI
40AQI
41AQI
42AQI
42AQI
41AQI
44AQI
44AQI
42AQI
40AQI
49AQI
50AQI
42AQI
43AQI
38AQI
50AQI
39AQI
50AQI
48AQI
44AQI
No. of days
202545AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
June39AQI
Most & Least Polluted Years Over the Last 1 Years
Longgang's annual 2025 AQI (45) shows an average percentage change of NaN% (improved AQI) compared to previous years: .