Cotan, Xian, Shaanxi, China 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
Cotan, Xian, Shaanxi, China
AQI Trends: Highest and Lowest
Same Day Analysis (1st October):
On this day, AQI across the 4 years varied significantly: 2026 ranks 4th highest AQI at 30 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 30th Sep - 1st Oct 2026
Cotan, Xian, Shaanxi, China
6 AM30th Sep 2026
6 PM
5 AM1st Oct 2026
65AQI
29AQI
30AQI
21AQI
In the last 24 hours,
Cotan's AQI reached its highest point of 65 at 12 PM during the Day, while the lowest point, 21, was recorded at 3 AM during the Night between 30th Sep and 1st Oct 2026.
Day & Night AQI Trend : Sep - Oct 2026
Cotan, Xian, Shaanxi, China
27°C21/32°C
25°C20/32°C
24°C18/30°C
26°C20/32°C
27°C21/35°C
25°C22/29°C
18°C16/23°C
13°C12/16°C
15°C12/20°C
18°C16/19°C
19°C13/24°C
25°C20/30°C
25°C20/29°C
25°C20/29°C
22°C19/27°C
22°C16/28°C
20°C16/23°C
20°C17/25°C
17°C16/19°C
19°C17/21°C
21°C16/27°C
22°C19/27°C
20°C18/24°C
17°C16/19°C
20°C17/24°C
18°C17/20°C
16°C16/18°C
18°C15/24°C
16°C12/21°C
13°C10/19°C
73AQI
58AQI
76AQI
57AQI
2026 Days Vs Air Quality
Cotan, Xian, Shaanxi, China
17%
46
53%
145
22%
59
9%
24
Total number of days with different AQI categories in last 274 days in 2026 (91 days remaining)
Under WHO’s Safe Air Quality Limits: 17%
Health Risk Level:
Extreme
In 2026, 17% of 274 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
Cotan, Xian, Shaanxi, China
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
112AQI (US)
164AQI (US)
185AQI (US)
146AQI (US)
124AQI (US)
72AQI (US)
118AQI (US)
99AQI (US)
112AQI (US)
73AQI (US)
83AQI (US)
146AQI (US)
150AQI (US)
146AQI (US)
146AQI (US)
155AQI (US)
157AQI (US)
166AQI (US)
100AQI (US)
59AQI (US)
108AQI (US)
150AQI (US)
165AQI (US)
180AQI (US)
180AQI (US)
155AQI (US)
142AQI (US)
176AQI (US)
138AQI (US)
144AQI (US)
169AQI (US)
162AQI (US)
148AQI (US)
163AQI (US)
166AQI (US)
168AQI (US)
162AQI (US)
98AQI (US)
117AQI (US)
136AQI (US)
94AQI (US)
131AQI (US)
148AQI (US)
141AQI (US)
162AQI (US)
86AQI (US)
85AQI (US)
144AQI (US)
160AQI (US)
119AQI (US)
112AQI (US)
123AQI (US)
106AQI (US)
101AQI (US)
73AQI (US)
130AQI (US)
135AQI (US)
109AQI (US)
102AQI (US)
41AQI (US)
68AQI (US)
103AQI (US)
151AQI (US)
139AQI (US)
106AQI (US)
96AQI (US)
117AQI (US)
100AQI (US)
151AQI (US)
160AQI (US)
159AQI (US)
160AQI (US)
116AQI (US)
73AQI (US)
108AQI (US)
107AQI (US)
70AQI (US)
100AQI (US)
112AQI (US)
140AQI (US)
129AQI (US)
134AQI (US)
122AQI (US)
126AQI (US)
154AQI (US)
124AQI (US)
93AQI (US)
86AQI (US)
66AQI (US)
70AQI (US)
79AQI (US)
111AQI (US)
94AQI (US)
86AQI (US)
107AQI (US)
101AQI (US)
121AQI (US)
108AQI (US)
104AQI (US)
96AQI (US)
100AQI (US)
118AQI (US)
106AQI (US)
95AQI (US)
88AQI (US)
52AQI (US)
70AQI (US)
67AQI (US)
90AQI (US)
95AQI (US)
44AQI (US)
41AQI (US)
63AQI (US)
85AQI (US)
73AQI (US)
90AQI (US)
91AQI (US)
104AQI (US)
94AQI (US)
79AQI (US)
73AQI (US)
61AQI (US)
34AQI (US)
45AQI (US)
60AQI (US)
71AQI (US)
46AQI (US)
57AQI (US)
55AQI (US)
67AQI (US)
78AQI (US)
121AQI (US)
55AQI (US)
70AQI (US)
87AQI (US)
78AQI (US)
77AQI (US)
74AQI (US)
75AQI (US)
88AQI (US)
101AQI (US)
100AQI (US)
89AQI (US)
83AQI (US)
84AQI (US)
62AQI (US)
94AQI (US)
64AQI (US)
52AQI (US)
53AQI (US)
75AQI (US)
69AQI (US)
89AQI (US)
90AQI (US)
74AQI (US)
75AQI (US)
51AQI (US)
61AQI (US)
42AQI (US)
50AQI (US)
56AQI (US)
56AQI (US)
33AQI (US)
50AQI (US)
67AQI (US)
62AQI (US)
59AQI (US)
75AQI (US)
29AQI (US)
57AQI (US)
46AQI (US)
46AQI (US)
30AQI (US)
57AQI (US)
43AQI (US)
71AQI (US)
46AQI (US)
63AQI (US)
73AQI (US)
69AQI (US)
57AQI (US)
47AQI (US)
65AQI (US)
59AQI (US)
42AQI (US)
58AQI (US)
73AQI (US)
45AQI (US)
69AQI (US)
62AQI (US)
49AQI (US)
56AQI (US)
25AQI (US)
39AQI (US)
73AQI (US)
22AQI (US)
72AQI (US)
18AQI (US)
64AQI (US)
78AQI (US)
72AQI (US)
92AQI (US)
44AQI (US)
51AQI (US)
67AQI (US)
74AQI (US)
60AQI (US)
43AQI (US)
40AQI (US)
25AQI (US)
41AQI (US)
40AQI (US)
28AQI (US)
28AQI (US)
36AQI (US)
43AQI (US)
36AQI (US)
54AQI (US)
63AQI (US)
71AQI (US)
71AQI (US)
58AQI (US)
69AQI (US)
51AQI (US)
54AQI (US)
41AQI (US)
58AQI (US)
77AQI (US)
95AQI (US)
36AQI (US)
53AQI (US)
68AQI (US)
92AQI (US)
72AQI (US)
74AQI (US)
73AQI (US)
59AQI (US)
44AQI (US)
63AQI (US)
38AQI (US)
36AQI (US)
57AQI (US)
62AQI (US)
65AQI (US)
58AQI (US)
66AQI (US)
62AQI (US)
83AQI (US)
87AQI (US)
119AQI (US)
74AQI (US)
22AQI (US)
35AQI (US)
48AQI (US)
53AQI (US)
52AQI (US)
71AQI (US)
84AQI (US)
40AQI (US)
52AQI (US)
82AQI (US)
109AQI (US)
76AQI (US)
61AQI (US)
77AQI (US)
108AQI (US)
120AQI (US)
58AQI (US)
63AQI (US)
92AQI (US)
93AQI (US)
66AQI (US)
47AQI (US)
30AQI (US)
136AQI (US)
128AQI (US)
112AQI (US)
88AQI (US)
72AQI (US)
58AQI (US)
54AQI (US)
57AQI (US)
71AQI (US)
30AQI (US)
No. of days
202686AQI (US)
Highest AQI (US) recorded in
January136AQI (US)
Lowest AQI (US) recorded in
October30AQI (US)
2025102AQI (US)
Highest AQI (US) recorded in
December154AQI (US)
Lowest AQI (US) recorded in
September59AQI (US)
202499AQI (US)
Highest AQI (US) recorded in
February138AQI (US)
Lowest AQI (US) recorded in
July65AQI (US)
202396AQI (US)
Highest AQI (US) recorded in
February140AQI (US)
Lowest AQI (US) recorded in
August58AQI (US)
20219AQI (US)
Highest AQI (US) recorded in
January9AQI (US)
Lowest AQI (US) recorded in
January9AQI (US)
2020107AQI (US)
Highest AQI (US) recorded in
December155AQI (US)
Lowest AQI (US) recorded in
August69AQI (US)
Most & Least Polluted Years Over the Last 6 Years
Cotan's annual 2026 AQI (US) (86) shows an average percentage change of 159.3% (worsened AQI (US)) compared to previous years: 2020 (107), 2021 (9), 2023 (96), 2024 (99), 2025 (102).