September weather forecastMerdeka, Indonesia
September
Weather in September
The first month of the autumn, September, is also a hot month in Merdeka, Indonesia, with an average temperature ranging between max 32.6°C (90.7°F) and min 23.4°C (74.1°F).Temperature
The dawn of September sees an average high-temperature of a still tropical 32.6°C (90.7°F), subtly contrasting with August's 33.1°C (91.6°F). In Merdeka, the expected average low-temperature for September is a warm 23.4°C (74.1°F).Heat index
Throughout September, the heat index is computed to be a burning hot 45°C (113°F). Warning: Heat cramps and heat exhaustion are anticipated. Heatstroke is a risk with ongoing activity.One should be cognizant that the heat index values are tailored for shaded spots and mild winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', stands as a testimony to how temperature and humidity combine to impact our sense of warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
The average relative humidity in September is 77%.Rainfall
In Merdeka, in September, it is raining for 26.7 days, with typically 105mm (4.13") of accumulated precipitation. Throughout the year, there are 298 rainfall days, and 1172mm (46.14") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 8min.On the first day of the month, sunrise is at 06:20 and sunset at 18:31. On the last day of September, sunrise is at 06:13 and sunset at 18:18 WIB.
Sunshine
The average sunshine in September is 8.8h.UV index
The months with the highest UV index in Merdeka 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 estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: An average maximum UV index of 7 in September leads to these recommendations:
Ward off overexposure. Defence against solar harm is crucial. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Merdeka, Indonesia
- Average high temperature in September: 32.6°C
The warmest month (with the highest average high temperature) is June (33.5°C).
The months with the lowest average high temperature are January and December (30.8°C).
- Average low temperature in September: 23.4°C
The month with the highest average low temperature is May (24.3°C).
The coldest month (with the lowest average low temperature) is January (23°C).
Average pressure in September
Merdeka, Indonesia
- Average pressure in September: 1010.6mbar
The month with the highest atmospheric pressure is January (1010.9mbar).
The month with the lowest atmospheric pressure is May (1009.6mbar).
Average wind speed in September
Merdeka, Indonesia
- Average wind speed in September: 4.8km/h
The windiest month (with the highest average wind speed) is February (5.6km/h).
The calmest months (with the lowest average wind speed) are September and October (4.8km/h).
Average humidity in September
Merdeka, Indonesia
- Average humidity in September: 77%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are March and June (75%).
Average rainfall in September
Merdeka, Indonesia
- Average rainfall in September: 105mm
The wettest month (with the highest rainfall) is October (154mm).
The driest month (with the least rainfall) is February (60mm).
Average rainfall days in September
Merdeka, Indonesia
- Average rainfall days in September: 26.7 days
The month with the highest number of rainy days is October (28.3 days).
The month with the least rainy days is February (18.8 days).
Average daylight in September /
Average sunshine in September
Merdeka, Indonesia
- Average daylight in September: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is June (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 8h and 0min).
Average sunshine days in September
Merdeka, Indonesia
- Average sunshine days in September: 1.9 days
The months with the most sunshine days are February and March (6.3 days).
The month with the least sunshine days is November (1 days).
Average UV index in September
Merdeka, Indonesia
- 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
Merdeka, Indonesia
- Average cloud cover in September: 37
The month with the most cloud cover is November (Cloud cover 45).
The month with the least cloud cover is March (Cloud cover 30).
Average visibility in September
Merdeka, Indonesia
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, June and August (10km).
The months with the lowest visibility are January, May, July, September, October, November and December (9km).
