Suzhou, Jiangsu, 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
Suzhou, Jiangsu, China
AQI Trends: Highest and Lowest
Same Day Analysis (28th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 83 of Moderate air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
Suzhou, Jiangsu, China
5 AM29th Sep 2025
6 PM
4 AM30th Sep 2025
AQI
AQI
91AQI
53AQI
In the last 24 hours,
Suzhou's AQI reached its highest point of 91 at 4 AM during the Night, while the lowest point, 53, was recorded at 10 PM during the Night between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Suzhou, Jiangsu, China
29°C26/35°C
28°C26/31°C
27°C25/31°C
28°C25/33°C
29°C26/34°C
30°C26/35°C
30°C26/35°C
30°C27/35°C
29°C26/35°C
26°C24/30°C
26°C23/29°C
27°C23/32°C
28°C24/34°C
27°C25/30°C
28°C25/32°C
29°C25/34°C
30°C26/35°C
29°C24/34°C
24°C23/27°C
26°C23/31°C
23°C21/25°C
23°C21/25°C
25°C21/30°C
27°C24/30°C
26°C24/28°C
27°C24/31°C
28°C25/32°C
27°C24/32°C
28°C25/32°C
--°C/°C
--°C/°C
61AQI
59AQI
63AQI
60AQI
2025 Days Vs Air Quality
Suzhou, Jiangsu, China
10%
27
69%
187
18%
48
3%
9
Total number of days with different AQI categories in last 272 days in 2025 (93 days remaining)
Under WHO’s Safe Air Quality Limits: 10%
Health Risk Level:
Extreme
In 2025, 10% of 272 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
Suzhou, Jiangsu, China
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
136AQI
105AQI
128AQI
98AQI
151AQI
128AQI
133AQI
133AQI
83AQI
96AQI
114AQI
112AQI
141AQI
154AQI
84AQI
115AQI
125AQI
137AQI
151AQI
177AQI
179AQI
130AQI
110AQI
96AQI
75AQI
93AQI
63AQI
80AQI
120AQI
104AQI
108AQI
67AQI
124AQI
113AQI
126AQI
100AQI
95AQI
76AQI
71AQI
85AQI
99AQI
75AQI
141AQI
78AQI
99AQI
78AQI
133AQI
76AQI
96AQI
89AQI
70AQI
75AQI
108AQI
123AQI
134AQI
157AQI
156AQI
163AQI
129AQI
112AQI
108AQI
73AQI
70AQI
72AQI
89AQI
98AQI
132AQI
90AQI
112AQI
108AQI
79AQI
79AQI
66AQI
64AQI
87AQI
75AQI
74AQI
93AQI
102AQI
86AQI
89AQI
92AQI
96AQI
107AQI
130AQI
106AQI
97AQI
102AQI
76AQI
74AQI
78AQI
106AQI
77AQI
92AQI
114AQI
110AQI
105AQI
106AQI
115AQI
122AQI
116AQI
179AQI
96AQI
94AQI
79AQI
81AQI
87AQI
96AQI
116AQI
85AQI
102AQI
92AQI
93AQI
114AQI
76AQI
72AQI
79AQI
88AQI
74AQI
90AQI
79AQI
83AQI
79AQI
62AQI
83AQI
94AQI
91AQI
74AQI
56AQI
67AQI
70AQI
77AQI
80AQI
81AQI
115AQI
87AQI
90AQI
84AQI
82AQI
77AQI
58AQI
83AQI
48AQI
90AQI
78AQI
79AQI
68AQI
75AQI
76AQI
84AQI
87AQI
55AQI
52AQI
78AQI
87AQI
72AQI
75AQI
81AQI
44AQI
67AQI
54AQI
66AQI
53AQI
41AQI
59AQI
50AQI
55AQI
65AQI
65AQI
61AQI
54AQI
55AQI
53AQI
49AQI
52AQI
65AQI
61AQI
55AQI
56AQI
55AQI
55AQI
51AQI
56AQI
59AQI
63AQI
65AQI
63AQI
50AQI
48AQI
48AQI
69AQI
56AQI
50AQI
62AQI
65AQI
69AQI
69AQI
68AQI
65AQI
48AQI
48AQI
45AQI
47AQI
44AQI
51AQI
51AQI
43AQI
43AQI
45AQI
42AQI
34AQI
48AQI
56AQI
57AQI
57AQI
59AQI
58AQI
56AQI
51AQI
53AQI
55AQI
62AQI
60AQI
62AQI
54AQI
46AQI
46AQI
49AQI
53AQI
51AQI
55AQI
58AQI
64AQI
59AQI
58AQI
57AQI
58AQI
59AQI
56AQI
54AQI
54AQI
52AQI
55AQI
57AQI
55AQI
59AQI
65AQI
66AQI
66AQI
75AQI
62AQI
58AQI
55AQI
58AQI
59AQI
63AQI
61AQI
63AQI
67AQI
65AQI
49AQI
52AQI
54AQI
50AQI
52AQI
47AQI
49AQI
53AQI
70AQI
77AQI
83AQI
118AQI
105AQI
92AQI
98AQI
79AQI
60AQI
54AQI
56AQI
60AQI
No. of days
202580AQI
Highest AQI recorded in
January118AQI
Lowest AQI recorded in
July54AQI
202484AQI
Highest AQI recorded in
January131AQI
Lowest AQI recorded in
July55AQI
202389AQI
Highest AQI recorded in
December127AQI
Lowest AQI recorded in
July58AQI
202286AQI
Highest AQI recorded in
January124AQI
Lowest AQI recorded in
October59AQI
202184AQI
Highest AQI recorded in
December120AQI
Lowest AQI recorded in
July56AQI
202081AQI
Highest AQI recorded in
December120AQI
Lowest AQI recorded in
August65AQI
Most & Least Polluted Years Over the Last 6 Years
Suzhou's annual 2025 AQI (80) shows an average percentage change of -5.5% (improved AQI) compared to previous years: 2020 (81), 2021 (84), 2022 (86), 2023 (89), 2024 (84).