December weather forecast
Rantau, Malaysia

The first month of the winter, December, is also a hot month in Rantau, Malaysia, with temperature in the range of an average high of 30.5°C (86.9°F) and an average low of 23.2°C (73.8°F).

Temperature

The coldest month is December, with an average high-temperature of 30.5°C (86.9°F) and an average low-temperature of 23.2°C (73.8°F).

Heat index

The heat index value for December is evaluated at an extremely hot 40°C (104°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Records show heat index calculations are tailored for shaded regions and mild winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular importance for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

December is the most humid month, with an average relative humidity of 83%.

Rainfall

In Rantau, in December, it is raining for 21.5 days, with typically 102mm (4.02") of accumulated precipitation. In Rantau, during the entire year, the rain falls for 245.4 days and collects up to 951mm (37.44") of precipitation.

Daylight

With an average of 12h and 0min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:01 am and sunset at 7:00 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:14 pm +08.

Sunshine

The month with the least sunshine is December, with an average of 7.2h of sunshine.

UV index

January through September, November and December, with an average maximum UV index of 7, are months with the highest 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 average person.
Note: The average daily UV index of 7 in December transforms into the following instructions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.