Changan District, Xian, Shaanxi, 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
Changan District, Xian, Shaanxi, China
AQI Trends: Highest and Lowest
Same Day Analysis (21st September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 42 of Good air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Changan District, Xian, Shaanxi, China
6 AM22nd Sep 2025
7 PM
5 AM23rd Sep 2025
AQI
AQI
58AQI
38AQI
In the last 24 hours,
Changan District's AQI reached its highest point of 58 at 12 AM during the Night, while the lowest point, 38, was recorded at 1 PM during the Night between 22nd Sep and 23rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Changan District, Xian, Shaanxi, China
26°C22/31°C
27°C23/32°C
30°C24/37°C
28°C24/33°C
24°C22/26°C
20°C18/21°C
19°C17/21°C
23°C17/30°C
26°C20/34°C
23°C19/29°C
22°C20/26°C
22°C20/24°C
18°C17/19°C
21°C16/28°C
23°C18/28°C
25°C20/32°C
25°C21/30°C
24°C22/29°C
21°C19/22°C
23°C19/28°C
26°C21/31°C
27°C22/34°C
28°C23/34°C
24°C21/26°C
18°C16/20°C
15°C14/16°C
16°C13/20°C
18°C14/24°C
16°C14/17°C
--°C/°C
--°C/°C
56AQI
52AQI
58AQI
58AQI
2025 Days Vs Air Quality
Changan District, Xian, Shaanxi, China
4%
10
50%
133
32%
85
10%
26
3%
9
0.3%
1
Total number of days with different AQI categories in last 265 days in 2025 (100 days remaining)
Under WHO’s Safe Air Quality Limits: 4%
Health Risk Level:
Extreme
In 2025, 4% of 265 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Changan District, Xian, Shaanxi, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
142AQI
149AQI
164AQI
164AQI
151AQI
138AQI
153AQI
147AQI
146AQI
132AQI
110AQI
122AQI
144AQI
105AQI
105AQI
128AQI
148AQI
134AQI
161AQI
166AQI
196AQI
214AQI
209AQI
191AQI
112AQI
116AQI
115AQI
158AQI
237AQI
231AQI
225AQI
222AQI
169AQI
108AQI
112AQI
87AQI
102AQI
86AQI
74AQI
103AQI
132AQI
146AQI
100AQI
145AQI
120AQI
153AQI
113AQI
155AQI
147AQI
161AQI
163AQI
170AQI
176AQI
115AQI
156AQI
119AQI
153AQI
145AQI
160AQI
184AQI
108AQI
95AQI
130AQI
127AQI
137AQI
130AQI
135AQI
131AQI
148AQI
230AQI
170AQI
130AQI
103AQI
84AQI
71AQI
81AQI
71AQI
77AQI
81AQI
101AQI
102AQI
103AQI
91AQI
94AQI
153AQI
139AQI
148AQI
142AQI
130AQI
128AQI
116AQI
131AQI
140AQI
143AQI
132AQI
136AQI
115AQI
134AQI
145AQI
140AQI
139AQI
294AQI
143AQI
117AQI
111AQI
137AQI
141AQI
158AQI
149AQI
113AQI
112AQI
153AQI
127AQI
114AQI
134AQI
102AQI
92AQI
72AQI
81AQI
129AQI
123AQI
110AQI
92AQI
106AQI
130AQI
554AQI
174AQI
163AQI
122AQI
104AQI
90AQI
96AQI
76AQI
97AQI
100AQI
101AQI
270AQI
139AQI
142AQI
130AQI
128AQI
129AQI
97AQI
102AQI
86AQI
89AQI
87AQI
80AQI
75AQI
95AQI
75AQI
92AQI
67AQI
72AQI
67AQI
71AQI
72AQI
65AQI
71AQI
67AQI
72AQI
79AQI
78AQI
83AQI
69AQI
68AQI
74AQI
81AQI
82AQI
73AQI
71AQI
73AQI
71AQI
68AQI
72AQI
67AQI
64AQI
65AQI
60AQI
61AQI
51AQI
58AQI
55AQI
56AQI
55AQI
40AQI
49AQI
51AQI
54AQI
63AQI
62AQI
64AQI
73AQI
72AQI
70AQI
65AQI
71AQI
65AQI
60AQI
65AQI
54AQI
58AQI
71AQI
66AQI
55AQI
43AQI
49AQI
52AQI
54AQI
59AQI
64AQI
57AQI
63AQI
63AQI
67AQI
70AQI
65AQI
63AQI
70AQI
67AQI
53AQI
50AQI
54AQI
60AQI
62AQI
66AQI
62AQI
53AQI
52AQI
52AQI
56AQI
54AQI
60AQI
58AQI
54AQI
54AQI
62AQI
61AQI
61AQI
53AQI
48AQI
55AQI
53AQI
59AQI
59AQI
61AQI
52AQI
53AQI
64AQI
65AQI
59AQI
60AQI
63AQI
53AQI
53AQI
58AQI
61AQI
65AQI
51AQI
50AQI
37AQI
45AQI
59AQI
42AQI
155AQI
135AQI
121AQI
132AQI
128AQI
71AQI
59AQI
59AQI
56AQI
No. of days
2025103AQI
Highest AQI recorded in
January155AQI
Lowest AQI recorded in
September56AQI
2024105AQI
Highest AQI recorded in
February171AQI
Lowest AQI recorded in
July64AQI
2023110AQI
Highest AQI recorded in
January190AQI
Lowest AQI recorded in
June68AQI
2022121AQI
Highest AQI recorded in
January178AQI
Lowest AQI recorded in
August66AQI
2021105AQI
Highest AQI recorded in
March178AQI
Lowest AQI recorded in
September51AQI
202098AQI
Highest AQI recorded in
December148AQI
Lowest AQI recorded in
August70AQI
Most & Least Polluted Years Over the Last 6 Years
Changan District's annual 2025 AQI (103) shows an average percentage change of -3.8% (improved AQI) compared to previous years: 2020 (98), 2021 (105), 2022 (121), 2023 (110), 2024 (105).