September weather forecast
Jerudong, Brunei

Weather in September

September, the first month of the autumn in Jerudong, is still a hot month, with an average temperature fluctuating between 30.8°C (87.4°F) and 25.8°C (78.4°F).

Temperature

In Jerudong, the average high-temperature in September is almost the same as in August - a still hot 30.8°C (87.4°F). In Jerudong, the average low-temperature is 25.8°C (78.4°F).

Heat index

The average heat index in September is appraised at a torrid 39°C (102.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, wind, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

August and September, with an average relative humidity of 75%, are the least humid months in Jerudong.

Rainfall

In Jerudong, during September, the rain falls for 25.9 days and regularly aggregates up to 113mm (4.45") of precipitation. Throughout the year, there are 310.9 rainfall days, and 1693mm (66.65") of precipitation is accumulated.

Daylight

In Jerudong, the average length of the day in September is 12h and 9min.
On the first day of September, sunrise is at 06:14 and sunset at 18:27. On the last day of the month, sunrise is at 06:08 and sunset at 18:13 +08.

Sunshine

The month with the most sunshine is September, with an average of 9h of sunshine.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Jerudong?

In Jerudong, in September, the average high-temperature is 30.8°C (87.4°F), and the average low-temperature is 25.8°C (78.4°F). in September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is appraised at 39°C (102.2°F).

What is the least humid month in Jerudong?

The months with the lowest humidity in Jerudong are August and September, with an average relative humidity of 75%.

What is the average humidity in September in Jerudong?

In September, the average relative humidity in Jerudong, Brunei, is 75%.

How many days does it rain in September in Jerudong?

In September, in Jerudong, the rain falls for 25.9 days. Throughout September, 113mm (4.45") of precipitation is accumulated.

How many hours of daylight does Jerudong have in September?

In Jerudong, Brunei, the average day length in September is 12h and 9min.

When is the sunrise / sunset in September in Jerudong?

On the first day of September in Jerudong, Brunei, sunrise is at 06:14 and sunset at 18:27. On the last day of the month, sunrise is at 06:08 and sunset at 18:13 +08.

What month has the most sunshine in Jerudong?

With an average of 9h of sunshine, September has the most sunshine of the year in Jerudong.

How long on average sun shines in September in Jerudong?

The average sunshine duration in September is 9h.

What is the month with the highest UV index in Jerudong?

January through December, with an average maximum UV index of 7, are months with the highest UV index.

What are the months with the lowest UV index in Jerudong?

The months with the lowest UV index in Jerudong are January through December, with an average maximum UV index of 7.

How high is the UV index in September in Jerudong?

The average daily maximum UV index in September in Jerudong, Brunei, is 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in September
Jerudong, Brunei

Average temperature in September - Jerudong, Brunei
  • Average high temperature in September: 30.8°C

The warmest months (with the highest average high temperature) are May and June (31.3°C).
The months with the lowest average high temperature are January and February (29.2°C).

  • Average low temperature in September: 25.8°C

The month with the highest average low temperature is May (26.3°C).
The coldest month (with the lowest average low temperature) is February (25°C).

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Average pressure in September
Jerudong, Brunei

Average pressure in September - Jerudong, Brunei
  • Average pressure in September: 1010.2mbar

The months with the highest atmospheric pressure are February and March (1010.5mbar).
The months with the lowest atmospheric pressure are November and December (1009.3mbar).

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Average wind speed in September
Jerudong, Brunei

Average wind speed in September - Jerudong, Brunei
  • Average wind speed in September: 9.1km/h

The windiest month (with the highest average wind speed) is February (10.2km/h).
The calmest month (with the lowest average wind speed) is May (7.7km/h).

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Average humidity in September
Jerudong, Brunei

Average humidity in September - Jerudong, Brunei
  • Average humidity in September: 75%

The months with the highest relative humidity are January, February and March (81%).
The months with the lowest relative humidity are August and September (75%).

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Average rainfall in September
Jerudong, Brunei

Average rainfall in September - Jerudong, Brunei
  • Average rainfall in September: 113mm

The wettest month (with the highest rainfall) is December (206mm).
The driest month (with the least rainfall) is February (73mm).

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Average rainfall days in September
Jerudong, Brunei

Average rainfall days in September - Jerudong, Brunei
  • Average rainfall days in September: 25.9 days

The month with the highest number of rainy days is December (28.7 days).
The month with the least rainy days is February (21.3 days).

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Average daylight in September /
Average sunshine in September
Jerudong, Brunei

Average daylight in September / Average sunshine in September - Jerudong, Brunei
  • Average daylight in September: 12h and 9min

The month with the longest days is June (Average daylight: 12h and 25min).
The month with the shortest days is December (Average daylight: 11h and 50min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is September (Average sunshine: 9h and 0min).
The month with the least sunshine is January (Average sunshine: 8h and 12min).

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Average sunshine days in September
Jerudong, Brunei

Average sunshine days in September - Jerudong, Brunei
  • Average sunshine days in September: 2.1 days

The months with the most sunshine days are February and June (4.8 days).
The month with the least sunshine days is November (0.6 days).

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Average UV index in September
Jerudong, Brunei

Average UV index in September - Jerudong, Brunei
  • 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).

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Average cloud cover in September
Jerudong, Brunei

Average cloud cover in September - Jerudong, Brunei
  • Average cloud cover in September: 36

The months with the most cloud cover are January and December (Cloud cover 42).
The month with the least cloud cover is September (Cloud cover 36).

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Average visibility in September
Jerudong, Brunei

Average visibility in September - Jerudong, Brunei
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, November and December (10km).
The month with the lowest visibility is October (9km).

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