December weather forecastMerak, Indonesia
December
Weather in December
December, the first month of the summer in Merak, is still a hot month, with an average temperature varying between 26.1°C (79°F) and 30.3°C (86.5°F).Temperature
With the advent of December, Merak experiences an average high-temperature of a still tropical 30.3°C (86.5°F), mirroring a close resemblance to the previous month. Nighttime temperature sees a small decrement from daytime highs, dipping to an average of 26.1°C (79°F) during December.Heat index
The heat index value for December is evaluated at a very hot 37°C (98.6°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.Observations indicate that the heat index values are for shady locations with light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In December, the average relative humidity is 74%.Rainfall
In Merak, in December, during 25.3 rainfall days, 107mm (4.21") of precipitation is typically accumulated. In Merak, during the entire year, the rain falls for 243.3 days and collects up to 1085mm (42.72") of precipitation.Daylight
With an average of 12h and 30min of daylight, December has the longest days of the year.On the first day of December, sunrise is at 05:31 and sunset at 17:58. On the last day of the month, sunrise is at 05:45 and sunset at 18:12 WIB.
Sunshine
The average sunshine in December is 8.6h.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 average individuals.Note: In December, the average maximum UV index of 7 translates into the following recommendations:
Deflect overexposure. Sun protection is a necessity. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Merak, Indonesia
- Average high temperature in December: 30.3°C
The warmest month (with the highest average high temperature) is October (31.5°C).
The month with the lowest average high temperature is January (29.5°C).
- Average low temperature in December: 26.1°C
The month with the highest average low temperature is May (26.5°C).
The coldest months (with the lowest average low temperature) are August and September (25°C).
Average pressure in December
Merak, Indonesia
- Average pressure in December: 1009.2mbar
The month with the highest atmospheric pressure is September (1011.1mbar).
The month with the lowest atmospheric pressure is December (1009.2mbar).
Average wind speed in December
Merak, Indonesia
- Average wind speed in December: 12.5km/h
The windiest month (with the highest average wind speed) is December (12.5km/h).
The calmest month (with the lowest average wind speed) is September (6.8km/h).
Average humidity in December
Merak, Indonesia
- Average humidity in December: 74%
The months with the highest relative humidity are February and March (77%).
The months with the lowest relative humidity are September and October (71%).
Average rainfall in December
Merak, Indonesia
- Average rainfall in December: 107mm
The wettest month (with the highest rainfall) is January (175mm).
The driest month (with the least rainfall) is August (21mm).
Average rainfall days in December
Merak, Indonesia
- Average rainfall days in December: 25.3 days
The month with the highest number of rainy days is March (26.3 days).
The month with the least rainy days is September (9.6 days).
Average daylight in December /
Average sunshine in December
Merak, Indonesia
- Average daylight in December: 12h and 30min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in December: 8h and 36min
The month with the most sunshine is September (Average sunshine: 9h and 18min).
The month with the least sunshine is June (Average sunshine: 7h and 0min).
Average sunshine days in December
Merak, Indonesia
- Average sunshine days in December: 3.3 days
The month with the most sunshine days is August (18.8 days).
The month with the least sunshine days is February (1.4 days).
Average UV index in December
Merak, 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
Merak, Indonesia
- Average cloud cover in December: 50
The months with the most cloud cover are January and December (Cloud cover 50).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in December
Merak, Indonesia
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
