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 sea temperature 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
Weather in September
Temperature
As September takes its course, Semporna's average high-temperature registers at a tropical 30°C (86°F), closely aligning with the preceding month. Semporna marks an average drop to a moderately hot 25.5°C (77.9°F) during nighttime in September, following the high of the day.Heat index
Throughout September, the heat index is estimated at a very hot 37°C (98.6°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.Understanding the heat index involves considering values for shaded locales with light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
September and October, with an average relative humidity of 76%, are the least humid months in Semporna.Rainfall
The months with the least rainfall in Semporna are February and September Rain falls for 21.5 days and accumulates 57mm (2.24") of rain.Sea temperature
In Semporna, in September, the average water temperature is 29.1°C (84.4°F).Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.
Daylight
The average length of the day in September in Semporna is 12h and 8min.On the first day of the month, sunrise is at 5:59 am and sunset at 6:11 pm. On the last day of September, in Semporna, Malaysia, sunrise is at 5:52 am and sunset at 5:57 pm +08.
Sunshine
In Semporna, the average sunshine in September is 10.5h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index in Semporna. The months with the lowest UV index in Semporna are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: A typical high UV index of 7 in September suggests the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection of sand and water increases the UV dose.
Frequently asked questions
How hot is it in Semporna in September?
What are the least humid months in Semporna?
What is the average humidity in September in Semporna?
What is the driest month in Semporna?
How many days does it rain in September in Semporna?
What is the sea water temperature in September in Semporna?
How many hours of daylight does Semporna have in September?
What time are sunrise and sunset in September in Semporna?
How many hours of sunshine does Semporna have in September?
What are the months with the highest UV index in Semporna?
When is the lowest UV index in Semporna?
What is the UV index reading in September in Semporna?
Average temperature in September
Semporna, Malaysia
- Average high temperature in September: 30°C
The warmest month (with the highest average high temperature) is May (30.7°C).
The month with the lowest average high temperature is January (29.3°C).
- Average low temperature in September: 25.5°C
The months with the highest average low temperature are May and November (25.9°C).
The coldest month (with the lowest average low temperature) is February (24.9°C).
Average pressure in September
Semporna, Malaysia
- Average pressure in September: 1009.4mbar
The month with the highest atmospheric pressure is February (1010.3mbar).
The months with the lowest atmospheric pressure are November and December (1008.7mbar).
Average wind speed in September
Semporna, Malaysia
- Average wind speed in September: 8.6km/h
The windiest month (with the highest average wind speed) is February (12km/h).
The calmest month (with the lowest average wind speed) is May (6.7km/h).
Average humidity in September
Semporna, Malaysia
- Average humidity in September: 76%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are September and October (76%).
Average rainfall in September
Semporna, Malaysia
- Average rainfall in September: 57mm
The wettest month (with the highest rainfall) is May (123mm).
The driest months (with the least rainfall) are February and September (57mm).
Average rainfall days in September
Semporna, Malaysia
- Average rainfall days in September: 21.5 days
The month with the highest number of rainy days is December (25.6 days).
The month with the least rainy days is February (18.3 days).
Average sea temperature in September
Semporna, Malaysia
- Average sea temperature in September: 29.1°C
The best month for swimming (with the highest average sea temperature) is June (29.9°C).
The coldest month (with the lowest average sea temperature) is January (28.1°C).
Average daylight in September /
Average sunshine in September
Semporna, Malaysia
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is May (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 7h and 18min).
Average sunshine days in September
Semporna, Malaysia
- Average sunshine days in September: 6.5 days
The month with the most sunshine days is March (8.8 days).
The month with the least sunshine days is December (2.6 days).
Average UV index in September
Semporna, Malaysia
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Semporna, Malaysia
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 44).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in September
Semporna, Malaysia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Semporna, Malaysia
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