September weather forecastBertais, Indonesia
September
Weather in September
The first month of the spring, September, is also a moderately hot month in Bertais, Indonesia, with an average temperature fluctuating between 23.6°C (74.5°F) and 27.6°C (81.7°F).Temperature
The arrival of September coincides with an average high-temperature of a still warm 27.6°C (81.7°F), indicating a minimal shift from August's 27.3°C (81.1°F). Bertais maintains an average low-temperature of 23.6°C (74.5°F) throughout September's nights.Heat index
September's average heat index is estimated at a tropical 31°C (87.8°F). Uninterrupted activity during exposure could lead to a sense of exhaustion, possibly causing heat cramps.Given the heat index, its values are aligned with shaded sites and gentle winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. 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.
Humidity
January through March, May through July, September and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Bertais, during September, the rain falls for 11.5 days and regularly aggregates up to 21mm (0.83") of precipitation. In Bertais, during the entire year, the rain falls for 231.2 days and collects up to 1002mm (39.45") of precipitation.Daylight
In Bertais, the average length of the day in September is 12h and 4min.On the first day of the month, sunrise is at 06:16 and sunset at 18:13. On the last day of September, sunrise is at 06:00 and sunset at 18:10 WITA.
Sunshine
In September, the average sunshine is 9.6h.UV index
January through May, July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, a regular UV index of 7 translates into these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bertais, 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
Bertais, 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
Bertais, 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
Bertais, 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
Bertais, 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
Bertais, 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
Bertais, Indonesia
- Average daylight in September: 12h and 6min
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 36min
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
Bertais, 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
Bertais, 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
Bertais, 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
Bertais, 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).
