Changsha, Hunan, 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
Changsha, Hunan, China
AQI Trends: Highest and Lowest
Same Day Analysis (4th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 91 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 4th Oct - 5th Oct 2025
Changsha, Hunan, China
6 AM4th Oct 2025
6 PM
5 AM5th Oct 2025
89AQI
67AQI
103AQI
87AQI
In the last 24 hours,
Changsha's AQI reached its highest point of 103 at 5 AM during the Night, while the lowest point, 67, was recorded at 12 PM during the Day between 4th Oct and 5th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Changsha, Hunan, China
31°C27/37°C
28°C25/31°C
28°C23/33°C
28°C24/35°C
25°C23/27°C
26°C23/31°C
27°C23/33°C
29°C24/35°C
26°C22/32°C
27°C24/33°C
29°C25/35°C
30°C26/36°C
30°C24/37°C
21°C20/22°C
19°C18/20°C
19°C17/20°C
19°C19/20°C
21°C19/23°C
20°C18/23°C
19°C18/22°C
20°C19/22°C
20°C18/22°C
24°C21/28°C
27°C22/33°C
24°C23/26°C
24°C21/29°C
26°C23/31°C
29°C22/35°C
24°C20/28°C
25°C19/31°C
--°C/°C
67AQI
64AQI
68AQI
67AQI
2025 Days Vs Air Quality
Changsha, Hunan, China
10%
28
59%
163
24%
66
6%
17
0.7%
2
0.3%
1
Total number of days with different AQI categories in last 278 days in 2025 (87 days remaining)
Under WHO’s Safe Air Quality Limits: 10%
Health Risk Level:
Extreme
In 2025, 10% of 278 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
Changsha, Hunan, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
171AQI
179AQI
192AQI
216AQI
147AQI
161AQI
159AQI
142AQI
142AQI
117AQI
134AQI
131AQI
137AQI
145AQI
124AQI
124AQI
123AQI
140AQI
154AQI
164AQI
158AQI
161AQI
240AQI
178AQI
104AQI
100AQI
111AQI
126AQI
188AQI
137AQI
129AQI
114AQI
114AQI
124AQI
107AQI
134AQI
108AQI
120AQI
73AQI
91AQI
97AQI
129AQI
138AQI
156AQI
154AQI
158AQI
147AQI
121AQI
109AQI
108AQI
106AQI
151AQI
77AQI
148AQI
132AQI
156AQI
145AQI
132AQI
121AQI
91AQI
85AQI
50AQI
86AQI
79AQI
115AQI
94AQI
97AQI
120AQI
102AQI
101AQI
129AQI
122AQI
75AQI
88AQI
78AQI
79AQI
82AQI
79AQI
83AQI
95AQI
96AQI
130AQI
107AQI
134AQI
137AQI
140AQI
88AQI
103AQI
74AQI
99AQI
94AQI
101AQI
99AQI
121AQI
123AQI
126AQI
134AQI
136AQI
136AQI
119AQI
115AQI
400AQI
144AQI
160AQI
113AQI
126AQI
120AQI
120AQI
81AQI
106AQI
68AQI
90AQI
89AQI
72AQI
75AQI
72AQI
80AQI
91AQI
102AQI
88AQI
93AQI
87AQI
100AQI
102AQI
85AQI
99AQI
99AQI
78AQI
79AQI
81AQI
80AQI
86AQI
85AQI
97AQI
99AQI
78AQI
81AQI
89AQI
78AQI
58AQI
62AQI
58AQI
71AQI
92AQI
99AQI
94AQI
114AQI
71AQI
70AQI
60AQI
56AQI
46AQI
62AQI
72AQI
84AQI
78AQI
80AQI
64AQI
73AQI
68AQI
74AQI
59AQI
57AQI
64AQI
54AQI
56AQI
56AQI
48AQI
49AQI
48AQI
49AQI
49AQI
35AQI
36AQI
42AQI
50AQI
56AQI
50AQI
47AQI
49AQI
49AQI
44AQI
40AQI
48AQI
53AQI
61AQI
63AQI
68AQI
72AQI
65AQI
58AQI
63AQI
61AQI
60AQI
60AQI
61AQI
60AQI
62AQI
65AQI
64AQI
56AQI
45AQI
45AQI
43AQI
51AQI
51AQI
56AQI
53AQI
55AQI
57AQI
54AQI
60AQI
63AQI
69AQI
64AQI
61AQI
60AQI
51AQI
50AQI
48AQI
56AQI
57AQI
61AQI
63AQI
63AQI
58AQI
46AQI
54AQI
56AQI
54AQI
47AQI
48AQI
50AQI
50AQI
56AQI
54AQI
53AQI
57AQI
60AQI
60AQI
60AQI
61AQI
60AQI
60AQI
60AQI
62AQI
64AQI
67AQI
71AQI
72AQI
65AQI
59AQI
58AQI
57AQI
55AQI
60AQI
61AQI
62AQI
63AQI
62AQI
59AQI
54AQI
59AQI
62AQI
63AQI
64AQI
51AQI
52AQI
57AQI
74AQI
80AQI
93AQI
84AQI
86AQI
98AQI
94AQI
91AQI
149AQI
124AQI
98AQI
117AQI
83AQI
57AQI
57AQI
56AQI
64AQI
92AQI
No. of days
202589AQI
Highest AQI recorded in
January149AQI
Lowest AQI recorded in
August56AQI
202499AQI
Highest AQI recorded in
December143AQI
Lowest AQI recorded in
July50AQI
202397AQI
Highest AQI recorded in
January153AQI
Lowest AQI recorded in
July54AQI
2022103AQI
Highest AQI recorded in
January149AQI
Lowest AQI recorded in
July53AQI
2021107AQI
Highest AQI recorded in
January152AQI
Lowest AQI recorded in
July66AQI
202096AQI
Highest AQI recorded in
December161AQI
Lowest AQI recorded in
June61AQI
Most & Least Polluted Years Over the Last 6 Years
Changsha's annual 2025 AQI (89) shows an average percentage change of -10.9% (improved AQI) compared to previous years: 2020 (96), 2021 (107), 2022 (103), 2023 (97), 2024 (99).