September weather forecastSemporna, Malaysia
September
Weather in September
September, the first month of the autumn in Semporna, is a hot month, with an average temperature ranging between min 25.5°C (77.9°F) and max 30°C (86°F).Temperature
The dawn of September sees an average high-temperature of a tropical 30°C (86°F), subtly contrasting with August's 29.8°C (85.6°F). Nighttime temperatures during September report a consistent average of 25.5°C (77.9°F).Heat index
In September, the heat index is estimated at a very hot 37°C (98.6°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
September and October, with an average relative humidity of 76%, are the least humid months.Rainfall
February and September are months with the least rain when the rain falls for 21.5 days and typically aggregates up to 57mm (2.24") of rain.Sea temperature
In September, the average sea temperature is 29.1°C (84.4°F).Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.
Daylight
In Semporna, the average length of the day in September is 12h and 8min.On the first day of September, sunrise is at 5:59 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 5:57 pm +08.
Sunshine
The average sunshine in September is 10.5h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 7 during September leads to these advisories:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Stay aware! UV radiation is magnified when reflecting off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 6min
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 30min
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).
