Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
December
Weather in December
Temperature
In Merdeka, the coldest period comes during January and December, when the average high-temperature touches 30.8°C (87.4°F).Heat index
The heat index value during December is computed to be a blisteringly hot 41°C (105.8°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.Observations indicate that the heat index values are for shady locations with light wind. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. 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 hold particular significance for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
The most humid month is December, with an average relative humidity of 81%.Rainfall
In Merdeka, during December, the rain falls for 27.1 days and regularly aggregates up to 122mm (4.8") of precipitation. Throughout the year, there are 298 rainfall days, and 1172mm (46.14") of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 11h and 54min of daylight.On the first day of the month, sunrise is at 06:16 and sunset at 18:13. On the last day of December, sunrise is at 06:30 and sunset at 18:27 WIB.
Sunshine
In Merdeka, the average sunshine in December is 8.1h.UV index
The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.Note: In December, the UV index of 7 transforms into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest?
Is it hot during December?
What is the most humid month in Merdeka?
What is the average humidity in December?
How much does it rain in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the highest UV index?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Merdeka, Indonesia
- Average high temperature in December: 30.8°C
The warmest month (with the highest average high temperature) is June (33.5°C).
The months with the lowest average high temperature are January and December (30.8°C).
- Average low temperature in December: 23.4°C
The month with the highest average low temperature is May (24.3°C).
The coldest month (with the lowest average low temperature) is January (23°C).
Average pressure in December
Merdeka, Indonesia
- Average pressure in December: 1010.2mbar
The month with the highest atmospheric pressure is January (1010.9mbar).
The month with the lowest atmospheric pressure is May (1009.6mbar).
Average wind speed in December
Merdeka, Indonesia
- Average wind speed in December: 5.3km/h
The windiest month (with the highest average wind speed) is February (5.6km/h).
The calmest months (with the lowest average wind speed) are September and October (4.8km/h).
Average humidity in December
Merdeka, Indonesia
- Average humidity in December: 81%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are March and June (75%).
Average rainfall in December
Merdeka, Indonesia
- Average rainfall in December: 122mm
The wettest month (with the highest rainfall) is October (154mm).
The driest month (with the least rainfall) is February (60mm).
Average rainfall days in December
Merdeka, Indonesia
- Average rainfall days in December: 27.1 days
The month with the highest number of rainy days is October (28.3 days).
The month with the least rainy days is February (18.8 days).
Average daylight in December /
Average sunshine in December
Merdeka, Indonesia
- Average daylight in December: 11h and 5min
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 December: 8h and 1min
The month with the most sunshine is June (Average sunshine: 9h and 12min).
The month with the least sunshine is November (Average sunshine: 8h and 0min).
Average sunshine days in December
Merdeka, Indonesia
- Average sunshine days in December: 2.3 days
The months with the most sunshine days are February and March (6.3 days).
The month with the least sunshine days is November (1 days).
Average UV index in December
Merdeka, Indonesia
- Average UV index in December: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in December
Merdeka, Indonesia
- Average cloud cover in December: 44
The month with the most cloud cover is November (Cloud cover 45).
The month with the least cloud cover is March (Cloud cover 30).
Average visibility in December
Merdeka, Indonesia
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, June and August (10km).
The months with the lowest visibility are January, May, July, September, October, November and December (9km).
