Changsha, Hunan, 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+

July Air Quality Analysis
Changsha, Hunan, China

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Jul. 1	46	51	69	66	53
Jul. 2		48	66	47	62
Jul. 3		56	54	40	60
Jul. 4		43	42	36	64
Jul. 5		50	40	33	72
Jul. 6		47	39	51	74
Jul. 7		52	41	34	78
Jul. 8		49	51	39	49
Jul. 9		53	54	45	55
Jul. 10		62	52	49	55
Jul. 11		63	56	47	77
Jul. 12		65	56	57	62
Jul. 13		63	59	61	57
Jul. 14		49	80	73	67
Jul. 15		58	60	75	77
Jul. 16		51	73	67	80
Jul. 17		39	75	67	95
Jul. 18		41	50	49	66
Jul. 19		36	36	50	68
Jul. 20		45	47	53	66
Jul. 21		50	55	44	58
Jul. 22		43	51	42	66
Jul. 23		55	41	60	61
Jul. 24		67	72	63	68
Jul. 25		76	56		59
Jul. 26		59	51	67	55
Jul. 27		54	59		70
Jul. 28		24	41		65
Jul. 29		29	48		57
Jul. 30		25	58		84
Jul. 31		38	53		73

AQI Trends: Highest and Lowest

Highest AQI recorded on

17th Jul 2021

95AQI

Lowest AQI recorded on

28th Jul 2024

24AQI

Same Day Analysis (1st July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks the most lowest AQI at 46 of Good air quality, showing improvement over 2024, 2023, 2022 and 2021 on the same day.

Day & Night AQI Trend: 1st Jul - 2nd Jul 2025
Changsha, Hunan, China

AQI

Day

Night

5 AM1st Jul 2025

7 PM

4 AM2nd Jul 2025

Day time

Avg. Highest Time

5AM1st Jul

50AQI

Avg. Lowest Time

10AM1st Jul

26AQI

Night time

Avg. Highest Time

1AM2nd Jul

51AQI

Avg. Lowest Time

4AM2nd Jul

49AQI

In the last 24 hours,

Changsha's AQI reached its highest point of 51 at 1 AM during the Night, while the lowest point, 26, was recorded at 10 AM during the Day between 1st Jul and 2nd Jul 2025.

Day & Night AQI Trend : Jun - Jul 2025
Changsha, Hunan, China

JunJul

02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd

Day

Night

19°C18/22°C

22°C19/26°C

26°C20/32°C

27°C22/33°C

30°C24/36°C

30°C25/36°C

24°C22/24°C

25°C22/30°C

25°C22/28°C

24°C23/25°C

24°C22/27°C

28°C23/33°C

29°C25/33°C

26°C23/31°C

28°C22/34°C

29°C24/33°C

27°C24/31°C

26°C24/29°C

26°C24/27°C

25°C22/28°C

22°C21/23°C

23°C21/26°C

27°C23/33°C

26°C24/30°C

28°C24/34°C

27°C24/32°C

26°C24/32°C

28°C24/34°C

30°C25/35°C

5 AM

12 PM

7 PM

12 AM

4 AM

0°C0/0°C

Day time

Avg. Highest Time

5 AM - 7 PM

53AQI

15 hours / Day

450 hours / Month

Avg. Lowest Time

5 AM - 7 PM

53AQI

15 hours / Day

450 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 5 AM to 7 PM (Avg. 53), while the lowest AQI was between 5 AM to 7 PM (Avg. 53).

Night time

Avg. Highest Time

12 AM - 11 PM

57AQI

9 hours / Day

270 hours / Month

Avg. Lowest Time

12 AM - 11 PM

57AQI

9 hours / Day

270 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 57), while the lowest AQI was between 12 AM to 11 PM (Avg. 57).

2025 Days Vs Air Quality
Changsha, Hunan, China

2025

44%

36%

0.5%

Total number of days with different AQI categories in last 183 days in 2025 (182 days remaining)

Good

16 Days

Moderate

80 Days

Poor

66 Days

Unhealthy

17 Days

Severe

2 Days

Hazardous

1 Days

Under WHO’s Safe Air Quality Limits: 9%

Health Risk Level:

Extreme

In 2025, 9% of 183 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

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.

149AQI

124AQI

98AQI

117AQI

83AQI

57AQI

46AQI

No. of days

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

2025104AQI

Highest AQI recorded in

January

149AQI

Lowest AQI recorded in

July

46AQI

202499AQI

166

103

Highest AQI recorded in

December

143AQI

Lowest AQI recorded in

July

50AQI

202397AQI

175

112

Highest AQI recorded in

January

153AQI

Lowest AQI recorded in

July

54AQI

2022103AQI

131

121

Highest AQI recorded in

January

149AQI

Lowest AQI recorded in

July

53AQI

2021107AQI

165

120

Highest AQI recorded in

January

152AQI

Lowest AQI recorded in

July

66AQI

202096AQI

118

Highest AQI recorded in

December

161AQI

Lowest AQI recorded in

June

61AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2021(Avg.)

107AQI

Least Polluted Year Recorded

2020(Avg.)

96AQI

Changsha's annual 2025 AQI (104) shows an average percentage change of 4.03% (worsened AQI) compared to previous years: 2020 (96), 2021 (107), 2022 (103), 2023 (97), 2024 (99).


5 AM	50
6 AM	50
7 AM	50
8 AM	35
9 AM	26
10 AM	26
11 AM	28
12 PM	34
1 PM	34
2 PM	34
3 PM	32
4 PM	30
5 PM	30
6 PM	34
7 PM	41
8 PM	49
9 PM	50
10 PM	50
11 PM	50
12 AM	50
1 AM	51
2 AM	51
3 AM	50
4 AM	49

Changsha, Hunan, China Historical Air Quality Analysis

July Air Quality AnalysisChangsha, Hunan, China

Day & Night AQI Trend: 1st Jul - 2nd Jul 2025Changsha, Hunan, China

Day & Night AQI Trend : Jun - Jul 2025Changsha, Hunan, China

2025 Days Vs Air Quality Changsha, Hunan, China

Annual Air Quality InsightsChangsha, Hunan, China

AQI levels in 2025

No. of days

July Air Quality Analysis
Changsha, Hunan, China

Day & Night AQI Trend: 1st Jul - 2nd Jul 2025
Changsha, Hunan, China

Day & Night AQI Trend : Jun - Jul 2025
Changsha, Hunan, China

2025 Days Vs Air Quality
Changsha, Hunan, China

Annual Air Quality Insights
Changsha, Hunan, China