January weather forecast
Petaling Jaya, Malaysia

January, the same as December, in Petaling Jaya, Malaysia, is another tropical winter month, with an average temperature varying between 22.9°C (73.2°F) and 31.2°C (88.2°F).

Temperature

In Petaling Jaya, Malaysia, the average high-temperature in January is essentially the same as in December - a still tropical 31.2°C (88.2°F). In January, the average low-temperature is 22.9°C (73.2°F).

Heat index

In January, the average heat index is appraised at a scorching 42°C (107.6°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. 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 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, differences in body mass, height, and shape, wind, and clothing 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 especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

In January, the average relative humidity in Petaling Jaya is 80%.

Rainfall

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

Daylight

In January, the average length of the day in Petaling Jaya is 11h and 58min.
On the first day of January in Petaling Jaya, Malaysia, sunrise is at 7:18 am and sunset at 7:15 pm. On the last day of the month, 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 unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in January interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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.