December weather forecast
Keraton, Indonesia

December

Weather in December

The first month of the summer, December, is still a hot month in Keraton, Indonesia, with an average temperature ranging between min 25°C (77°F) and max 30.5°C (86.9°F).

Temperature

December's advent notes a subtle adjustment in average high-temperature to a still tropical 30.5°C (86.9°F) from November. Keraton's average low-temperature in the month of December is recorded at a moderately hot 25°C (77°F).

Heat index

The average heat index in December is estimated at a torrid 38°C (100.4°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

The average relative humidity in December is 75%.

Rainfall

December is the month with the most rainfall. Rain falls for 25.5 days and accumulates 146mm (5.75") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 30min of daylight.
On the first day of December in Keraton, sunrise is at 05:20 and sunset at 17:49. On the last day of the month, sunrise is at 05:33 and sunset at 18:04 WIB.

Sunshine

With an average of 8.2h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index 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 reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 7 in December translates into the following instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.

Frequently asked questions

Is it hot during December?
In December, in Keraton, the average high-temperature is 30.5°C (86.9°F), and the average low-temperature is 25°C (77°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in December is estimated at 38°C (100.4°F).
What is the average humidity in December?
In Keraton, the average relative humidity in December is 75%.
What is the rainiest month?
The month with the most rainfall is December, when the rain falls for 25.5 days and typically aggregates up to 146mm (5.75") of precipitation.
How many days does it rain in December?
In Keraton, in December, it is raining for 25.5 days, with typically 146mm (5.75") of accumulated precipitation.
When are the longest days?
With an average of 12h and 30min of daylight, December has the longest days of the year.
What is the average length of the day in December?
In Keraton, the average day length in December is 12h and 30min.
When is the sunrise / sunset in December?
On the first day of December, sunrise is at 05:20 and sunset at 17:49. On the last day of the month, sunrise is at 05:33 and sunset at 18:04 WIB.
What is the month with the least sunshine?
December has the least sunshine of the year, with an average of 8.2h of sunshine.
How many hours of sunshine does Keraton have in December?
In Keraton, the average sunshine duration in December is 8.2h.
What is the month with the highest UV index?
January through December, with an average maximum UV index of 7, are months with the highest UV index.
What are the months with the lowest UV index?
The months with the lowest UV index are January through December, with an average maximum UV index of 7.
What is the UV index reading in December in Keraton?
In Keraton, the average daily maximum UV index in December is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.
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
Keraton, Indonesia
  • Average high temperature in December: 30.5°C

The warmest month (with the highest average high temperature) is October (31.8°C).
The month with the lowest average high temperature is February (29.4°C).

  • Average low temperature in December: 25°C

The months with the highest average low temperature are November and December (25°C).
The coldest month (with the lowest average low temperature) is August (22.2°C).

Average pressure in December
Keraton, Indonesia
  • Average pressure in December: 1009.2mbar

The month with the highest atmospheric pressure is September (1011.4mbar).
The month with the lowest atmospheric pressure is December (1009.2mbar).

Average wind speed in December
Keraton, Indonesia
  • Average wind speed in December: 7.1km/h

The windiest month (with the highest average wind speed) is August (12.7km/h).
The calmest month (with the lowest average wind speed) is April (6.9km/h).

Average humidity in December
Keraton, Indonesia
  • Average humidity in December: 75%

The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are September and October (69%).

Average rainfall in December
Keraton, Indonesia
  • Average rainfall in December: 146mm

The wettest month (with the highest rainfall) is December (146mm).
The driest month (with the least rainfall) is August (10mm).

Average rainfall days in December
Keraton, Indonesia
  • Average rainfall days in December: 25.5 days

The month with the highest number of rainy days is December (25.5 days).
The month with the least rainy days is August (6.5 days).

Average daylight in December /
Average sunshine in December
Keraton, Indonesia
  • Average daylight in December: 12h and 3min

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 42min).

  • Average sunshine in December: 8h and 1min

The months with the most sunshine are August and September (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 8h and 12min).

Average sunshine days in December
Keraton, Indonesia
  • Average sunshine days in December: 3.5 days

The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is December (3.5 days).

Average UV index in December
Keraton, 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
Keraton, Indonesia
  • Average cloud cover in December: 47

The months with the most cloud cover are January and February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 17).

Average visibility in December
Keraton, Indonesia
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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