Biji Square, Kunming, Yunnan, 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
Biji Square, Kunming, Yunnan, China
AQI Trends: Highest and Lowest
Same Day Analysis (13th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 77 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 13th Oct - 14th Oct 2025
Biji Square, Kunming, Yunnan, China
6 AM13th Oct 2025
5 PM
5 AM14th Oct 2025
AQI
AQI
75AQI
33AQI
In the last 24 hours,
Biji Square's AQI reached its highest point of 75 at 1 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 13th Oct and 14th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Biji Square, Kunming, Yunnan, China
18°C16/22°C
18°C14/22°C
19°C15/23°C
19°C15/24°C
19°C15/23°C
20°C16/24°C
19°C16/24°C
20°C16/25°C
19°C16/24°C
18°C15/22°C
18°C15/23°C
16°C13/21°C
14°C13/15°C
18°C14/22°C
18°C14/24°C
16°C13/18°C
15°C14/17°C
17°C15/20°C
18°C15/23°C
19°C16/25°C
19°C16/24°C
19°C15/24°C
19°C16/23°C
16°C14/18°C
16°C14/19°C
17°C14/21°C
17°C14/22°C
18°C14/23°C
18°C14/24°C
--°C/°C
--°C/°C
45AQI
33AQI
53AQI
34AQI
2025 Days Vs Air Quality
Biji Square, Kunming, Yunnan, China
34%
96
59%
170
7%
20
Total number of days with different AQI categories in last 286 days in 2025 (79 days remaining)
Under WHO’s Safe Air Quality Limits: 34%
Health Risk Level:
High
In 2025, 34% of 286 days were within WHO’s safe air quality limits. The risk of health issues is High, with respiratory problems, heart disease, skin issues, and stress being more common, particularly among children and the elderly.
Annual Air Quality Insights
Biji Square, Kunming, Yunnan, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
69AQI
81AQI
80AQI
78AQI
76AQI
84AQI
69AQI
70AQI
86AQI
66AQI
55AQI
87AQI
74AQI
85AQI
118AQI
120AQI
93AQI
86AQI
99AQI
97AQI
80AQI
79AQI
73AQI
54AQI
60AQI
54AQI
67AQI
87AQI
97AQI
75AQI
75AQI
84AQI
90AQI
61AQI
87AQI
80AQI
91AQI
72AQI
83AQI
77AQI
73AQI
71AQI
80AQI
83AQI
73AQI
68AQI
75AQI
58AQI
59AQI
64AQI
64AQI
67AQI
66AQI
70AQI
49AQI
55AQI
42AQI
40AQI
51AQI
52AQI
58AQI
57AQI
60AQI
63AQI
56AQI
61AQI
66AQI
67AQI
64AQI
67AQI
76AQI
90AQI
103AQI
103AQI
84AQI
80AQI
58AQI
76AQI
90AQI
112AQI
107AQI
100AQI
83AQI
74AQI
70AQI
69AQI
120AQI
134AQI
130AQI
134AQI
105AQI
109AQI
130AQI
115AQI
134AQI
117AQI
124AQI
113AQI
105AQI
111AQI
93AQI
81AQI
86AQI
81AQI
77AQI
57AQI
56AQI
55AQI
62AQI
63AQI
63AQI
58AQI
67AQI
76AQI
74AQI
93AQI
89AQI
89AQI
71AQI
77AQI
62AQI
62AQI
51AQI
42AQI
60AQI
57AQI
52AQI
58AQI
63AQI
62AQI
52AQI
63AQI
61AQI
62AQI
58AQI
58AQI
64AQI
58AQI
53AQI
60AQI
58AQI
59AQI
79AQI
59AQI
48AQI
44AQI
43AQI
36AQI
38AQI
31AQI
30AQI
29AQI
35AQI
35AQI
55AQI
44AQI
60AQI
58AQI
71AQI
70AQI
69AQI
63AQI
67AQI
72AQI
76AQI
68AQI
67AQI
55AQI
54AQI
50AQI
51AQI
55AQI
55AQI
50AQI
44AQI
43AQI
45AQI
43AQI
45AQI
42AQI
44AQI
41AQI
35AQI
34AQI
36AQI
35AQI
35AQI
37AQI
37AQI
35AQI
37AQI
36AQI
42AQI
47AQI
47AQI
53AQI
54AQI
53AQI
54AQI
47AQI
52AQI
50AQI
44AQI
44AQI
43AQI
44AQI
42AQI
45AQI
46AQI
51AQI
51AQI
52AQI
57AQI
56AQI
53AQI
52AQI
54AQI
54AQI
48AQI
50AQI
48AQI
47AQI
46AQI
44AQI
49AQI
55AQI
56AQI
47AQI
47AQI
49AQI
52AQI
52AQI
47AQI
44AQI
40AQI
42AQI
43AQI
42AQI
43AQI
44AQI
42AQI
43AQI
49AQI
50AQI
49AQI
47AQI
42AQI
50AQI
52AQI
54AQI
53AQI
52AQI
53AQI
46AQI
46AQI
48AQI
46AQI
51AQI
40AQI
46AQI
50AQI
51AQI
52AQI
50AQI
55AQI
52AQI
48AQI
47AQI
23AQI
39AQI
49AQI
17AQI
17AQI
24AQI
34AQI
43AQI
50AQI
60AQI
63AQI
35AQI
35AQI
31AQI
47AQI
51AQI
58AQI
77AQI
80AQI
69AQI
83AQI
88AQI
54AQI
54AQI
44AQI
48AQI
46AQI
47AQI
No. of days
202562AQI
Highest AQI recorded in
April88AQI
Lowest AQI recorded in
July44AQI
202463AQI
Highest AQI recorded in
April97AQI
Lowest AQI recorded in
July34AQI
202373AQI
Highest AQI recorded in
February105AQI
Lowest AQI recorded in
July45AQI
202270AQI
Highest AQI recorded in
March99AQI
Lowest AQI recorded in
June46AQI
202177AQI
Highest AQI recorded in
March128AQI
Lowest AQI recorded in
July50AQI
202074AQI
Highest AQI recorded in
March127AQI
Lowest AQI recorded in
August51AQI
Most & Least Polluted Years Over the Last 6 Years
Biji Square's annual 2025 AQI (62) shows an average percentage change of -12.6% (improved AQI) compared to previous years: 2020 (74), 2021 (77), 2022 (70), 2023 (73), 2024 (63).