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 average temperatures reach their apex in September, averaging 29.2°C (84.6°F) at the high end and 19.1°C (66.4°F) at the low end.Heat index
September's heat index is estimated at a tropical 33°C (91.4°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
The least humid month is September, with an average relative humidity of 71%.Rainfall
In Cilember, Indonesia, in September, it is raining for 19.7 days, with typically 90mm (3.54") of accumulated precipitation. In Cilember, during the entire year, the rain falls for 305.7 days and collects up to 2701mm (106.34") of precipitation.Daylight
In Cilember, the average length of the day in September is 12h and 4min.On the first day of September, sunrise is at 05:52 and sunset at 17:51. On the last day of the month, sunrise is at 05:37 and sunset at 17:47 WIB.
Sunshine
With an average of 9.2h of sunshine, September has the most sunshine of the year.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 6 suggests these recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest?
Is it hot during September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September?
What is the average length of the day in September?
When is the sunrise / sunset in September in Cilember?
What month has the most sunshine?
How many hours of sunshine does Cilember have in September?
What are the months with the highest UV index?
What are the months with the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Cilember, Indonesia
- Average high temperature in September: 29.2°C
The warmest month (with the highest average high temperature) is September (29.2°C).
The month with the lowest average high temperature is January (25.6°C).
- Average low temperature in September: 19.1°C
The month with the highest average low temperature is November (20.9°C).
The coldest month (with the lowest average low temperature) is July (18.6°C).
Average pressure in September
Cilember, Indonesia
- Average pressure in September: 1011.4mbar
The month with the highest atmospheric pressure is September (1011.4mbar).
The month with the lowest atmospheric pressure is December (1009.3mbar).
Average wind speed in September
Cilember, Indonesia
- Average wind speed in September: 5.3km/h
The windiest month (with the highest average wind speed) is January (6.5km/h).
The calmest months (with the lowest average wind speed) are April and November (4.3km/h).
Average humidity in September
Cilember, Indonesia
- Average humidity in September: 71%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is September (71%).
Average rainfall in September
Cilember, Indonesia
- Average rainfall in September: 90mm
The wettest month (with the highest rainfall) is March (382mm).
The driest month (with the least rainfall) is August (66mm).
Average rainfall days in September
Cilember, Indonesia
- Average rainfall days in September: 19.7 days
The month with the highest number of rainy days is March (30.5 days).
The month with the least rainy days is August (16.5 days).
Average daylight in September /
Average sunshine in September
Cilember, Indonesia
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is September (Average sunshine: 9h and 12min).
The month with the least sunshine is July (Average sunshine: 6h and 48min).
Average sunshine days in September
Cilember, Indonesia
- Average sunshine days in September: 8.1 days
The month with the most sunshine days is August (12.3 days).
The month with the least sunshine days is February (0.1 days).
Average UV index in September
Cilember, Indonesia
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
Cilember, Indonesia
- Average cloud cover in September: 30
The months with the most cloud cover are January and February (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Cilember, Indonesia
- Average visibility in September: 9km
The months with the highest visibility are August, September, October and November (9km).
The months with the lowest visibility are January, February, March, April, May, June, July and December (8km).
