Gulangyu, Xiamen, Fujian, China Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

September Air Quality Analysis
Gulangyu, Xiamen, Fujian, China

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Sep. 1	57	63	43		54
Sep. 2	62	91	41	70	43
Sep. 3	61	57	20	49	43
Sep. 4	54	42	17	37	22
Sep. 5	59	43	25	58	36
Sep. 6	60	31	32	68	32
Sep. 7	55	32	48	72	52
Sep. 8	47	23	43	71	49
Sep. 9	45	30	51		48
Sep. 10	54	75	54	94	40
Sep. 11	56	96	53	64	39
Sep. 12	55	94	47	105	32
Sep. 13	57	29	61	107	54
Sep. 14	57	45	46	98	76
Sep. 15	58	56	39	63	70
Sep. 16	56	52	76	84	57
Sep. 17	52	27	85	62	68
Sep. 18	48	33	32	87	58
Sep. 19		50	42	112	58
Sep. 20		33	63	82	49
Sep. 21		42	65	63	44
Sep. 22		18	53	51	40
Sep. 23		29	37	76	66
Sep. 24		25	39	76	31
Sep. 25		58	47	62	48
Sep. 26		54	49	65	60
Sep. 27		43	57	40	60
Sep. 28		32	58	59	60
Sep. 29		41	52	68	77
Sep. 30		20	56	62	82

AQI Trends: Highest and Lowest

Highest AQI recorded on

19th Sep 2022

112AQI

Lowest AQI recorded on

4th Sep 2023

17AQI

Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 48 of Good air quality, showing improvement over 2022 and 2021 on the same day.

Day & Night AQI Trend: 19th Sep - 20th Sep 2025
Gulangyu, Xiamen, Fujian, China

AQI

Day

Night

5 AM19th Sep 2025

6 PM

4 AM20th Sep 2025

Day time

Avg. Highest Time

12AMNaNth undefined

AQI

Avg. Lowest Time

12AMNaNth undefined

AQI

Night time

Avg. Highest Time

3PM19th Sep

60AQI

Avg. Lowest Time

5PM19th Sep

20AQI

In the last 24 hours,

Gulangyu's AQI reached its highest point of 60 at 3 PM during the Night, while the lowest point, 20, was recorded at 5 PM during the Night between 19th Sep and 20th Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025
Gulangyu, Xiamen, Fujian, China

AugSep

21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th

Day

Night

28°C26/29°C

28°C26/31°C

29°C27/31°C

28°C27/31°C

28°C26/31°C

28°C26/30°C

28°C26/31°C

29°C27/31°C

28°C26/30°C

28°C27/29°C

27°C26/28°C

28°C26/30°C

29°C27/32°C

28°C27/30°C

28°C26/29°C

28°C27/30°C

28°C27/31°C

28°C26/30°C

28°C26/31°C

29°C27/32°C

28°C27/31°C

28°C27/30°C

28°C26/30°C

28°C26/31°C

28°C26/30°C

--°C/°C

5 AM

11 AM

6 PM

11 PM

4 AM

--°C/°C

Day time

Avg. Highest Time

5 AM - 2 PM

55AQI

10 hours / Day

300 hours / Month

Avg. Lowest Time

5 PM - 6 PM

47AQI

2 hours / Day

60 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 5 AM to 2 PM (Avg. 55), while the lowest AQI was between 5 PM to 6 PM (Avg. 47).

Night time

Avg. Highest Time

1 AM - 4 AM

55AQI

4 hours / Day

120 hours / Month

Avg. Lowest Time

7 PM

51AQI

1 hours / Day

30 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 1 AM to 4 AM (Avg. 55), while the lowest AQI was between 7 PM to 7 PM (Avg. 51).

2025 Days Vs Air Quality
Gulangyu, Xiamen, Fujian, China

2025

31%

66%

172

Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)

Good

82 Days

Moderate

172 Days

Poor

7 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 31%

Health Risk Level:

High

In 2025, 31% of 262 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
Gulangyu, Xiamen, Fujian, China

AQI levels in 2025

AQI

PM2.5

PM10

SO2

NO2

Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

83AQI

76AQI

68AQI

72AQI

62AQI

45AQI

49AQI

48AQI

55AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202562AQI

172

Highest AQI recorded in

January

83AQI

Lowest AQI recorded in

June

45AQI

202461AQI

135

194

Highest AQI recorded in

January

96AQI

Lowest AQI recorded in

July

29AQI

202366AQI

103

222

Highest AQI recorded in

March

88AQI

Lowest AQI recorded in

July

39AQI

202259AQI

111

179

Highest AQI recorded in

March

78AQI

Lowest AQI recorded in

August

27AQI

202162AQI

116

216

Highest AQI recorded in

January

88AQI

Lowest AQI recorded in

June

46AQI

202055AQI

112

144

Highest AQI recorded in

April

78AQI

Lowest AQI recorded in

June

33AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2023(Avg.)

66AQI

Least Polluted Year Recorded

2020(Avg.)

55AQI

Gulangyu's annual 2025 AQI (62) shows an average percentage change of 2.7% (worsened AQI) compared to previous years: 2020 (55), 2021 (62), 2022 (59), 2023 (66), 2024 (61).


5 AM	54
6 AM	54
7 AM	54
8 AM	29
9 AM	21
10 AM	27
11 AM	27
12 PM	40
1 PM	41
2 PM	55
3 PM	60
4 PM	52
5 PM	20
6 PM	23
7 PM	26
8 PM	36
9 PM	43
10 PM	36
11 PM	38
12 AM	40
1 AM	54
2 AM	55
3 AM	54
4 AM	53

Gulangyu, Xiamen, Fujian, China Historical Air Quality Analysis

September Air Quality AnalysisGulangyu, Xiamen, Fujian, China

Day & Night AQI Trend: 19th Sep - 20th Sep 2025Gulangyu, Xiamen, Fujian, China

Day & Night AQI Trend : Aug - Sep 2025Gulangyu, Xiamen, Fujian, China

2025 Days Vs Air Quality Gulangyu, Xiamen, Fujian, China

Annual Air Quality InsightsGulangyu, Xiamen, Fujian, China

AQI levels in 2025

No. of days

September Air Quality Analysis
Gulangyu, Xiamen, Fujian, China

Day & Night AQI Trend: 19th Sep - 20th Sep 2025
Gulangyu, Xiamen, Fujian, China

Day & Night AQI Trend : Aug - Sep 2025
Gulangyu, Xiamen, Fujian, China

2025 Days Vs Air Quality
Gulangyu, Xiamen, Fujian, China

Annual Air Quality Insights
Gulangyu, Xiamen, Fujian, China