December weather forecast
Gulun, Indonesia

December

Weather in December

The first month of the summer, December, is still a warm month in Gulun, Indonesia, with an average temperature ranging between min 23.1°C (73.6°F) and max 29°C (84.2°F).

Temperature

The shift from November to December is characterized by an average high-temperature of a still warm 29°C (84.2°F), not significantly different from the 29.8°C (85.6°F) of November. Gulun's nights in December experience an average temperature drop to a still warm 23.1°C (73.6°F).

Heat index

For most parts of December, the heat index is calculated to be a sweltering 36°C (96.8°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

The average relative humidity in December is 84%.

Rainfall

In Gulun, in December, it is raining for 23.6 days, with typically 151mm (5.94") of accumulated precipitation. In Gulun, during the entire year, the rain falls for 247.2 days and collects up to 1234mm (48.58") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 36min of daylight.
On the first day of the month, sunrise is at 05:07 and sunset at 17:39. On the last day of December, sunrise is at 05:20 and sunset at 17:54 WIB.

Sunshine

The month with the least sunshine is December, with an average of 7h of sunshine.

UV index

The months with the lowest UV index are January, March through August, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 6 in December converts into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.

Frequently asked questions

How hot does it get in December?
The average high-temperature and low-temperature during December are 29°C (84.2°F) and 23.1°C (73.6°F) respectively. The average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in December is calculated to be 36°C (96.8°F).
What is the average humidity in December in Gulun?
In Gulun, the average relative humidity in December is 84%.
How much does it rain in December?
In December, the rain falls for 23.6 days. Throughout December, 151mm (5.94") of precipitation is accumulated.
When are the longest days?
With an average of 12h and 36min of daylight, December has the longest days of the year in Gulun.
What is the average length of the day in December?
The average day length in December is 12h and 34min.
When are sunrise and sunset in December?
In December, on the first day of the month, sunrise is at 05:07 and sunset at 17:39. On the last day of the month, sunrise is at 05:20 and sunset at 17:54 WIB.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 7h of sunshine.
How many hours of sunshine does Gulun have in December?
In Gulun, the average sunshine duration in December is 7h.
When is the lowest UV index?
The months with the lowest UV index in Gulun are January, March through August, November and December, with an average maximum UV index of 6.
What is the UV index reading in December?
The average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Gulun, Indonesia
  • Average high temperature in December: 29°C

The warmest month (with the highest average high temperature) is October (30.9°C).
The month with the lowest average high temperature is July (28.6°C).

  • Average low temperature in December: 23.1°C

The month with the highest average low temperature is November (23.5°C).
The coldest month (with the lowest average low temperature) is August (20.8°C).

Average pressure in December
Gulun, Indonesia
  • Average pressure in December: 1009mbar

The months with the highest atmospheric pressure are August and September (1011.8mbar).
The month with the lowest atmospheric pressure is December (1009mbar).

Average wind speed in December
Gulun, Indonesia
  • Average wind speed in December: 8.3km/h

The windiest month (with the highest average wind speed) is August (11.1km/h).
The calmest month (with the lowest average wind speed) is April (6.2km/h).

Average humidity in December
Gulun, Indonesia
  • Average humidity in December: 84%

The months with the highest relative humidity are February, March and April (85%).
The months with the lowest relative humidity are September and October (75%).

Average rainfall in December
Gulun, Indonesia
  • Average rainfall in December: 151mm

The wettest month (with the highest rainfall) is March (178mm).
The driest month (with the least rainfall) is August (26mm).

Average rainfall days in December
Gulun, Indonesia
  • Average rainfall days in December: 23.6 days

The month with the highest number of rainy days is November (26.5 days).
The month with the least rainy days is August (9.8 days).

Average daylight in December /
Average sunshine in December
Gulun, Indonesia
  • Average daylight in December: 12h and 4min

The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).

  • Average sunshine in December: 7h and 0min

The month with the most sunshine is August (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

Average sunshine days in December
Gulun, Indonesia
  • Average sunshine days in December: 5.5 days

The month with the most sunshine days is August (14.3 days).
The month with the least sunshine days is November (2.1 days).

Average UV index in December
Gulun, Indonesia
  • Average UV index in December: 6

The months with the highest UV index are February, September and October (UV index 7).
The months with the lowest UV index are January, March, April, May, June, July, August, November and December (UV index 6).

Average cloud cover in December
Gulun, Indonesia
  • Average cloud cover in December: 52

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in December
Gulun, Indonesia
  • Average visibility in December: 9km

The months with the highest visibility are August and September (10km).
The months with the lowest visibility are January, March and April (8km).

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