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
With the onset of September, the average high-temperature registers at a still moderately hot 27.6°C (81.7°F), subtly different from August's 27.3°C (81.1°F). Selong documents an average low-temperature of 23.6°C (74.5°F) for the nights of September.Heat index
September's mean heat index is estimated at a hot 31°C (87.8°F). Continuous exposure and activity could induce a sense of tiredness and subsequently, heat cramps.Be advised, the heat index considers values for conditions in shade and with a light breeze. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. 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. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. 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
January through March, May through July, September and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In September, the rain falls for 11.5 days. Throughout September, 21mm (0.83") of precipitation is accumulated. Throughout the year, there are 231.2 rainfall days, and 1002mm (39.45") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 4min.On the first day of September, sunrise is at 06:15 and sunset at 18:12. On the last day of the month, sunrise is at 05:58 and sunset at 18:09 WITA.
Sunshine
In September, the average sunshine is 9.6h.UV index
The months with the highest UV index are January through May, July through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 7 during September translates into the following guidance:
Guard oneself from overexposure. Defence against sun injury is vital. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the most 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?
What time are sunrise and sunset in September?
How many hours of sunshine does Selong have in September?
What is the month with the highest UV index?
What is the UV index intensity in September?
Average temperature in September
Selong, Indonesia
- Average high temperature in September: 27.6°C
The warmest month (with the highest average high temperature) is November (29°C).
The months with the lowest average high temperature are July and August (27.3°C).
- Average low temperature in September: 23.6°C
The month with the highest average low temperature is December (26.1°C).
The coldest month (with the lowest average low temperature) is August (23.2°C).
Average pressure in September
Selong, Indonesia
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is August (1011.9mbar).
The month with the lowest atmospheric pressure is December (1008.3mbar).
Average wind speed in September
Selong, Indonesia
- Average wind speed in September: 12.8km/h
The windiest month (with the highest average wind speed) is July (13.3km/h).
The calmest month (with the lowest average wind speed) is April (7.6km/h).
Average humidity in September
Selong, Indonesia
- Average humidity in September: 79%
The months with the highest relative humidity are January, February, March, May, June, July, September and December (79%).
The month with the lowest relative humidity is October (77%).
Average rainfall in September
Selong, Indonesia
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is December (165mm).
The driest month (with the least rainfall) is August (10mm).
Average rainfall days in September
Selong, Indonesia
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is January (27.1 days).
The month with the least rainy days is August (10.3 days).
Average daylight in September /
Average sunshine in September
Selong, Indonesia
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 36min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is October (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 7h and 54min).
Average sunshine days in September
Selong, Indonesia
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is August (16.1 days).
The month with the least sunshine days is January (2.9 days).
Average UV index in September
Selong, Indonesia
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is June (UV index 6).
Average cloud cover in September
Selong, Indonesia
- Average cloud cover in September: 22
The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are August and September (Cloud cover 22).
Average visibility in September
Selong, Indonesia
- 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).
