December weather forecast
Petaling Jaya, Malaysia

Weather in December

December, the first month of the winter in Petaling Jaya, is still a tropical month, with an average temperature ranging between max 30.9°C (87.6°F) and min 23.3°C (73.9°F).

Temperature

The coldest month is December, with an average high-temperature of 30.9°C (87.6°F) and an average low-temperature of 23.3°C (73.9°F).

Heat index

The average heat index in December is appraised at a scorching 41°C (105.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, clothing, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The most humid month is December, with an average relative humidity of 82%.

Rainfall

In December, the rain falls for 26.8 days. Throughout December, 153mm (6.02") of precipitation is accumulated. In Petaling Jaya, during the entire year, the rain falls for 309.8 days and collects up to 1481mm (58.31") of precipitation.

Daylight

The month with the shortest days in Petaling Jaya is December, with an average of 11h and 57min of daylight.
On the first day of the month, sunrise is at 7:03 am and sunset at 7:01 pm. On the last day of December, sunrise is at 7:17 am and sunset at 7:14 pm +08.

Sunshine

The months with the least sunshine in Petaling Jaya are November and December, with an average of 7.4h of sunshine.

UV index

The months with the highest UV index in Petaling Jaya are February through October and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. 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 coldest month in Petaling Jaya?

December is the coldest month in Petaling Jaya, Malaysia, with an average high-temperature of 30.9°C (87.6°F) and an average low-temperature of 23.3°C (73.9°F).

What is the temperature in December in Petaling Jaya?

The average high-temperature, in December, in Petaling Jaya, is 30.9°C (87.6°F), while the average low-temperature is 23.3°C (73.9°F). in December, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is appraised at 41°C (105.8°F).

What is the most humid month in Petaling Jaya?

The most humid month in Petaling Jaya, Malaysia, is December, with an average relative humidity of 82%.

What is the average humidity in December in Petaling Jaya?

In Petaling Jaya, Malaysia, the average relative humidity in December is 82%.

How many days does it rain in December in Petaling Jaya?

In Petaling Jaya, in December, it is raining for 26.8 days, with typically 153mm (6.02") of accumulated precipitation.

What is the month with the shortest days in Petaling Jaya?

With an average of 11h and 57min of daylight, December has the shortest days of the year in Petaling Jaya.

How many hours of daylight does Petaling Jaya have in December?

In Petaling Jaya, the average day length in December is 11h and 57min.

When is the sunrise / sunset in December in Petaling Jaya?

On the first day of December, sunrise is at 7:03 am and sunset at 7:01 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:14 pm +08.

What are the months with the least sunshine in Petaling Jaya?

The months with the least sunshine in Petaling Jaya are November and December, with an average of 7.4h of sunshine.

How many hours of sunshine does Petaling Jaya have in December?

In December, the average sunshine duration in Petaling Jaya is 7.4h.

When is the highest UV index in Petaling Jaya?

February through October and December, with an average maximum UV index of 7, are months with the highest UV index in Petaling Jaya.

What is the UV index intensity in December in Petaling Jaya?

The average daily maximum UV index in December in Petaling Jaya is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.

Average temperature in December
Petaling Jaya, Malaysia

Average temperature in December - Petaling Jaya, Malaysia
  • Average high temperature in December: 30.9°C

The warmest months (with the highest average high temperature) are February, April, May and June (32.4°C).
The month with the lowest average high temperature is December (30.9°C).

  • Average low temperature in December: 23.3°C

The month with the highest average low temperature is May (24.4°C).
The coldest months (with the lowest average low temperature) are January and February (22.9°C).

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Average pressure in December
Petaling Jaya, Malaysia

Average pressure in December - Petaling Jaya, Malaysia
  • Average pressure in December: 1009.6mbar

The month with the highest atmospheric pressure is January (1010.5mbar).
The month with the lowest atmospheric pressure is May (1008.7mbar).

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Average wind speed in December
Petaling Jaya, Malaysia

Average wind speed in December - Petaling Jaya, Malaysia
  • Average wind speed in December: 4.2km/h

The windiest months (with the highest average wind speed) are July and August (5.2km/h).
The calmest months (with the lowest average wind speed) are November and December (4.2km/h).

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Average humidity in December
Petaling Jaya, Malaysia

Average humidity in December - Petaling Jaya, Malaysia
  • Average humidity in December: 82%

The month with the highest relative humidity is December (82%).
The months with the lowest relative humidity are August and September (73%).

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Average rainfall in December
Petaling Jaya, Malaysia

Average rainfall in December - Petaling Jaya, Malaysia
  • Average rainfall in December: 153mm

The wettest month (with the highest rainfall) is November (194mm).
The driest month (with the least rainfall) is February (68mm).

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Average rainfall days in December
Petaling Jaya, Malaysia

Average rainfall days in December - Petaling Jaya, Malaysia
  • Average rainfall days in December: 26.8 days

The month with the highest number of rainy days is May (29.2 days).
The month with the least rainy days is February (19.4 days).

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Average daylight in December /
Average sunshine in December
Petaling Jaya, Malaysia

Average daylight in December / Average sunshine in December - Petaling Jaya, Malaysia
  • Average daylight in December: 11h and 57min

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 57min).

  • Average sunshine in December: 7h and 24min

The month with the most sunshine is June (Average sunshine: 8h and 48min).
The months with the least sunshine are November and December (Average sunshine: 7h and 24min).

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Average sunshine days in December
Petaling Jaya, Malaysia

Average sunshine days in December - Petaling Jaya, Malaysia
  • Average sunshine days in December: 3.5 days

The month with the most sunshine days is January (8.8 days).
The month with the least sunshine days is May (1.1 days).

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Average UV index in December
Petaling Jaya, Malaysia

Average UV index in December - Petaling Jaya, Malaysia
  • Average UV index in December: 7

The months with the highest UV index are February, March, April, May, June, July, August, September, October and December (UV index 7).
The months with the lowest UV index are January and November (UV index 6).

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Average cloud cover in December
Petaling Jaya, Malaysia

Average cloud cover in December - Petaling Jaya, Malaysia
  • Average cloud cover in December: 48

The month with the most cloud cover is November (Cloud cover 51).
The months with the least cloud cover are June and July (Cloud cover 34).

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Average visibility in December
Petaling Jaya, Malaysia

Average visibility in December - Petaling Jaya, Malaysia
  • Average visibility in December: 9km

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

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