December weather forecast
Medan, Indonesia

As Medan, Indonesia enters December, the relatively consistent temperature continues to make it a haven for warmth-seekers. However, increased cloud cover above the city limits the hours of sunlight to only 11.9 hours. Nevertheless, the ambient air pressure maintains a consistent value, ensuring that the warm weather remains undisturbed. With the higher rainfall of 122mm (4.8"), Medan enters the New Year with a fresh, washed appearance. In spite of the approaching new year, Medan's tropical weather remains unwavering, offering warm and humid conditions for residents and tourists alike.

Temperature

January and December in Medan are characterised by lowest temperatures, with an average high of 30.8°C (87.4°F).

Heat index

In December, the average heat index is computed to be a scorching 41°C (105.8°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', shows a temperature sensation when both heat and moisture conditions are combined. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

With an average relative humidity of 81%, December is the most humid month.

Rainfall

In Medan, during December, the rain falls for 27.1 days and regularly aggregates up to 122mm (4.8") of precipitation. Throughout the year, in Medan, there are 298 rainfall days, and 1172mm (46.14") of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 11h and 54min of daylight.
On the first day of December in Medan, sunrise is at 06:16 and sunset at 18:12. On the last day of the month, sunrise is at 06:30 and sunset at 18:25 WIB.

Sunshine

In Medan, the average sunshine in December is 8.1h.

UV index

The months with the highest UV index in Medan are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 7 in December, converts into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.