Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The arrival of September marks a slight shift to an average high-temperature of a still tropical 30.6°C (87.1°F) from August's 30.8°C (87.4°F). The mean low-temperature during September nights in Sepang is a warm 24.9°C (76.8°F).Heat index
The heat index for September is estimated at a torrid 38°C (100.4°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 74%.Rainfall
September is the month with the least rainfall. Rain falls for 25.4 days and accumulates 64mm (2.52") of precipitation.Daylight
In September, the average length of the day is 12h and 8min.On the first day of September in Sepang, sunrise is at 7:07 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 7:05 pm +08.
Sunshine
The average sunshine in September in Sepang, Malaysia, is 8.9h.UV index
February through October and December, with an average maximum UV index of 7, are months with the highest UV index in Sepang. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Sepang?
What is the least humid month in Sepang?
What is the average humidity in September in Sepang?
What is the driest month in Sepang?
How many days does it rain in September in Sepang?
How many hours of daylight does Sepang have in September?
When are sunrise and sunset in September in Sepang?
How long on average sun shines in September in Sepang?
What are the months with the highest UV index in Sepang?
What is the UV index intensity in September in Sepang?
Average temperature in September
Sepang, Malaysia
- Average high temperature in September: 30.6°C
The warmest month (with the highest average high temperature) is May (31.5°C).
The month with the lowest average high temperature is December (30.1°C).
- Average low temperature in September: 24.9°C
The month with the highest average low temperature is May (25.7°C).
The coldest months (with the lowest average low temperature) are January and February (23.9°C).
Average pressure in September
Sepang, Malaysia
- Average pressure in September: 1009.7mbar
The month with the highest atmospheric pressure is January (1010.4mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).
Average wind speed in September
Sepang, Malaysia
- Average wind speed in September: 6.8km/h
The windiest month (with the highest average wind speed) is August (7.5km/h).
The calmest month (with the lowest average wind speed) is December (5.9km/h).
Average humidity in September
Sepang, Malaysia
- Average humidity in September: 74%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are August and September (74%).
Average rainfall in September
Sepang, Malaysia
- Average rainfall in September: 64mm
The wettest month (with the highest rainfall) is December (180mm).
The driest month (with the least rainfall) is September (64mm).
Average rainfall days in September
Sepang, Malaysia
- Average rainfall days in September: 25.4 days
The months with the highest number of rainy days are November and December (27.9 days).
The month with the least rainy days is February (23 days).
Average daylight in September /
Average sunshine in September
Sepang, Malaysia
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 12h and 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is June (Average sunshine: 9h and 0min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).
Average sunshine days in September
Sepang, Malaysia
- Average sunshine days in September: 3.6 days
The month with the most sunshine days is August (4.8 days).
The month with the least sunshine days is November (1.5 days).
Average UV index in September
Sepang, Malaysia
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, June, July, August, September, October and December (UV index 7).
The months with the lowest UV index are January and November (UV index 6).
Average cloud cover in September
Sepang, Malaysia
- Average cloud cover in September: 36
The month with the most cloud cover is November (Cloud cover 49).
The months with the least cloud cover are June and July (Cloud cover 32).
Average visibility in September
Sepang, Malaysia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (10km).
The month with the lowest visibility is November (9km).
