January weather forecast
Petaling Jaya, Malaysia

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Weather in January

January in Petaling Jaya, Malaysia witnesses a somewhat cooler climate due to a lower average monthly temperature from 22.9°C (73.2°F) to 31.2°C (88.2°F). Comparatively less humid than other months, it also has the least hours of sunshine (7.4 hours) to warm your skin. Transitioning from December, a slight drop in relative humidity at 80% brings a hint of freshness in the air. Blocked by patches of fluffy, post-rain clouds, only 7.8 hours of sunshine pierce through the vast mist, illuminating the city. Moving ahead, February promises slightly warmer days and less rainfall.

Temperature

Petaling Jaya records an average high-temperature of a still hot 31.2°C (88.2°F) as January arrives, nearly mirroring the previous month's climate. During January, Petaling Jaya consistently records a temperature low averaging an agreeable 22.9°C (73.2°F).

Heat index

The heat index in January is estimated at an extremely hot 42°C (107.6°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. 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 extremely vital to babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

The average relative humidity in January in Petaling Jaya, Malaysia, is 80%.

Rainfall

In Petaling Jaya, Malaysia, in January, it is raining for 21.3 days, with typically 85mm (3.35") of accumulated precipitation. Throughout the year, there are 309.8 rainfall days, and 1481mm (58.31") of precipitation is accumulated.

Daylight

The average length of the day in January is 11h and 58min.
On the first day of the month, sunrise is at 7:18 am and sunset at 7:15 pm. On the last day of January, sunrise is at 7:27 am and sunset at 7:26 pm +08.

Sunshine

The average sunshine in January is 7.8h.

UV index

January and November, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: In January, the UV index of 6 transforms into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Updated: Feb 9, 2024 | Published by: Weather Atlas | About Us / Weather Forecasting / Data Sources

Frequently asked questions

Is it hot in Petaling Jaya during January?

The high-temperature, in January, in Petaling Jaya, records 31.2°C (88.2°F), while the low-temperature is 22.9°C (73.2°F). The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in January is estimated at 42°C (107.6°F).

What is the average humidity in January in Petaling Jaya?

The average relative humidity in January in Petaling Jaya is 80%.

How much does it rain in Petaling Jaya in January?

In Petaling Jaya, Malaysia, in January, during 21.3 rainfall days, 85mm (3.35") of precipitation is typically accumulated.

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

In Petaling Jaya, the average day length in January is 11h and 58min.

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

In January, on the first day of the month, sunrise is at 7:18 am and sunset at 7:15 pm. On the last day of the month, in Petaling Jaya, Malaysia, sunrise is at 7:27 am and sunset at 7:26 pm +08.

How long on average sun shines in January in Petaling Jaya?

In Petaling Jaya, Malaysia, the average sunshine duration in January is 7.8h.

What are the months with the lowest UV index in Petaling Jaya?

January and November, with an average maximum UV index of 6, are months with the lowest UV index in Petaling Jaya.

How high is the UV index in January in Petaling Jaya?

The average daily maximum UV index in January is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Petaling Jaya, Malaysia

Average temperature in January - Petaling Jaya, Malaysia
  • Average high temperature in January: 31.2°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 January: 22.9°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).

Average pressure in January
Petaling Jaya, Malaysia

Average pressure in January - Petaling Jaya, Malaysia
  • Average pressure in January: 1010.5mbar

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

Average wind speed in January
Petaling Jaya, Malaysia

Average wind speed in January - Petaling Jaya, Malaysia
  • Average wind speed in January: 4.5km/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).

Average humidity in January
Petaling Jaya, Malaysia

Average humidity in January - Petaling Jaya, Malaysia
  • Average humidity in January: 80%

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

Average rainfall in January
Petaling Jaya, Malaysia

Average rainfall in January - Petaling Jaya, Malaysia
  • Average rainfall in January: 85mm

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

Average rainfall days in January
Petaling Jaya, Malaysia

Average rainfall days in January - Petaling Jaya, Malaysia
  • Average rainfall days in January: 21.3 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).

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

Average daylight in January / Average sunshine in January - Petaling Jaya, Malaysia
  • Average daylight in January: 12h and 0min

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 54min).

  • Average sunshine in January: 7h and 5min

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).

Average sunshine days in January
Petaling Jaya, Malaysia

Average sunshine days in January - Petaling Jaya, Malaysia
  • Average sunshine days in January: 8.8 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).

Average UV index in January
Petaling Jaya, Malaysia

Average UV index in January - Petaling Jaya, Malaysia
  • Average UV index in January: 6

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).

Average cloud cover in January
Petaling Jaya, Malaysia

Average cloud cover in January - Petaling Jaya, Malaysia
  • Average cloud cover in January: 44

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).

Average visibility in January
Petaling Jaya, Malaysia

Average visibility in January - Petaling Jaya, Malaysia
  • Average visibility in January: 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).

Petaling Jaya, Malaysia

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