Kuala Selangor, Klang, Selangor, Malaysia 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
Kuala Selangor, Klang, Selangor, Malaysia

2021

2022

2023

2024

2025

AQI

Days

AQI Trends: Highest and Lowest

Highest AQI recorded on

1st Sep 2025

59AQI

Lowest AQI recorded on

10th Sep 2021

0AQI

Same Day Analysis (5th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 37 of Good air quality on the same day.

Day & Night AQI Trend: 5th Sep - 6th Sep 2025
Kuala Selangor, Klang, Selangor, Malaysia

AQI

Day

Night

7 AM5th Sep 2025

7 PM

6 AM6th Sep 2025

Day time

Avg. Highest Time

10AM5th Sep

62AQI

Avg. Lowest Time

5PM5th Sep

34AQI

Night time

Avg. Highest Time

10PM5th Sep

60AQI

Avg. Lowest Time

1AM6th Sep

53AQI

In the last 24 hours,

Kuala Selangor's AQI reached its highest point of 62 at 10 AM during the Day, while the lowest point, 34, was recorded at 5 PM during the Day between 5th Sep and 6th Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025
Kuala Selangor, Klang, Selangor, Malaysia

AugSep

07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th

Day

Night

28°C25/31°C

27°C25/30°C

25°C24/25°C

26°C23/29°C

27°C25/29°C

28°C26/30°C

27°C25/29°C

27°C25/30°C

28°C25/30°C

27°C24/30°C

27°C25/29°C

26°C25/28°C

27°C25/30°C

27°C24/29°C

27°C26/29°C

28°C25/31°C

28°C26/31°C

25°C22/26°C

27°C24/30°C

27°C25/29°C

28°C26/30°C

28°C25/31°C

27°C25/28°C

27°C26/30°C

27°C25/29°C

27°C24/30°C

7 AM

1 PM

7 PM

1 AM

6 AM

--°C/°C

Day time

Avg. Highest Time

9 AM - 10 AM

65AQI

2 hours / Day

60 hours / Month

Avg. Lowest Time

4 PM - 7 PM

57AQI

4 hours / Day

120 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 9 AM to 10 AM (Avg. 65), while the lowest AQI was between 4 PM to 7 PM (Avg. 57).

Night time

Avg. Highest Time

9 PM - 11 PM

62AQI

3 hours / Day

90 hours / Month

Avg. Lowest Time

12 AM - 8 PM

60AQI

8 hours / Day

240 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 62), while the lowest AQI was between 12 AM to 8 PM (Avg. 60).

2025 Days Vs Air Quality
Kuala Selangor, Klang, Selangor, Malaysia

2025

30%

70%

173

Total number of days with different AQI categories in last 249 days in 2025 (116 days remaining)

Good

75 Days

Moderate

173 Days

Poor

0 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 30%

Health Risk Level:

High

In 2025, 30% of 249 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
Kuala Selangor, Klang, Selangor, Malaysia

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.

60AQI

67AQI

56AQI

52AQI

49AQI

43AQI

51AQI

60AQI

50AQI

No. of days

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

202555AQI

173

Highest AQI recorded in

February

67AQI

Lowest AQI recorded in

June

43AQI

202424AQI

254

108

Highest AQI recorded in

June

59AQI

Lowest AQI recorded in

September

0AQI

20230AQI

318

Highest AQI recorded in

February

0AQI

Lowest AQI recorded in

December

0AQI

20220AQI

266

Highest AQI recorded in

January

0AQI

Lowest AQI recorded in

November

0AQI

202122AQI

219

Highest AQI recorded in

February

64AQI

Lowest AQI recorded in

December

0AQI

202053AQI

175

Highest AQI recorded in

August

64AQI

Lowest AQI recorded in

November

44AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2025(Avg.)

55AQI

Least Polluted Year Recorded

2022(Avg.)

0AQI

Kuala Selangor's annual 2025 AQI (55) shows an average percentage change of 96.04% (worsened AQI) compared to previous years: 2020 (53), 2021 (22), 2022 (0), 2023 (0), 2024 (24).

Days	2025	2022	2021
Sep. 1	59
Sep. 2	55	0
Sep. 3	58
Sep. 4	43	0
Sep. 5	37
Sep. 6		0
Sep. 7		0
Sep. 8		0
Sep. 9
Sep. 10		0	0
Sep. 11		0	0
Sep. 12		0	0
Sep. 13		0	0
Sep. 14		0	0
Sep. 15		0	0
Sep. 16		0	0
Sep. 17		0	0
Sep. 18		0	0
Sep. 19		0	0
Sep. 20		0	0
Sep. 21		0	0
Sep. 22		0	0
Sep. 23		0	0
Sep. 24			0
Sep. 25		0	0
Sep. 26		0	0
Sep. 27		0	0
Sep. 28		0	0
Sep. 29		0	0
Sep. 30		0	0


7 AM	55
8 AM	49
9 AM	54
10 AM	62
11 AM	57
12 PM	53
1 PM	54
2 PM	48
3 PM	40
4 PM	46
5 PM	34
6 PM	40
7 PM	49
8 PM	53
9 PM	56
10 PM	60
11 PM	60
12 AM	56
1 AM	53
2 AM	54
3 AM	54
4 AM	54
5 AM	55
6 AM	54

Kuala Selangor, Klang, Selangor, Malaysia Historical Air Quality Analysis

September Air Quality AnalysisKuala Selangor, Klang, Selangor, Malaysia

Day & Night AQI Trend: 5th Sep - 6th Sep 2025Kuala Selangor, Klang, Selangor, Malaysia

Day & Night AQI Trend : Aug - Sep 2025Kuala Selangor, Klang, Selangor, Malaysia

2025 Days Vs Air Quality Kuala Selangor, Klang, Selangor, Malaysia

Annual Air Quality InsightsKuala Selangor, Klang, Selangor, Malaysia

AQI levels in 2025

No. of days

September Air Quality Analysis
Kuala Selangor, Klang, Selangor, Malaysia

Day & Night AQI Trend: 5th Sep - 6th Sep 2025
Kuala Selangor, Klang, Selangor, Malaysia

Day & Night AQI Trend : Aug - Sep 2025
Kuala Selangor, Klang, Selangor, Malaysia

2025 Days Vs Air Quality
Kuala Selangor, Klang, Selangor, Malaysia

Annual Air Quality Insights
Kuala Selangor, Klang, Selangor, Malaysia