December weather forecast
Kuala Lumpur, Malaysia

In December, Kuala Lumpur experiences a gradual drop in rainfall and humidity, setting a more comfortable tone for the holiday season. However, the weather remains consistently tropical with minor fluctuations in temperature, wind, and other weather parameters. The duration of daylight reduces down to 11.9 hours, the least around the year, corresponding to shorter days and longer nights. The wind maintains a moderate speed providing a refreshing breeze to the otherwise warm climate. This month signifies the end of the monsoon season and draws a close to the weather calendar, gearing up to restart in January.

Temperature

In Kuala Lumpur, the lowest average temperatures are observed in December, with a high of 30.6°C (87.1°F) and a low of 23.1°C (73.6°F).

Heat index

The heat index value during December is estimated at a scorching 40°C (104°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Understanding the heat index involves considering values for shaded locales with light wind. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

November and December, with an average relative humidity of 82%, are the most humid months.

Rainfall

In December, in Kuala Lumpur, the rain falls for 24.7 days. Throughout December, 84mm (3.31") of precipitation is accumulated. In Kuala Lumpur, during the entire year, the rain falls for 287.9 days and collects up to 866mm (34.09") of precipitation.

Snowfall

January through August, October through December are months without snowfall in Kuala Lumpur.

Daylight

The month with the shortest days in Kuala Lumpur is December, with an average of 11h and 54min of daylight.
On the first day of the month, sunrise is at 7:03 am and sunset at 7:00 pm. On the last day of December, sunrise is at 7:17 am and sunset at 7:14 pm +08.

Sunshine

With an average of 7.3h of sunshine, December has the least sunshine of the year.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 7 in December interprets into the following advice:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. 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. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.