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 sea temperature 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
The transition into December notes an average high-temperature of a still moderately hot 29°C (84.2°F), revealing a mild distinction from the 29.2°C (84.6°F) in November. The average low-temperature, in December, is a still moderately hot 23.8°C (74.8°F).Heat index
The heat index value for December is estimated at a very hot 36°C (96.8°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.
Humidity
In December, the average relative humidity is 85%.Rainfall
December is the month with the most rainfall. Rain falls for 28 days and accumulates 261mm (10.28") of precipitation.Sea temperature
In Jayapura, in December, the average water temperature is 29.3°C (84.7°F).Note: Swimming, diving, and similar water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as very agreeable and pleasurable for lengthy periods without discomfort.
Daylight
December has the longest days of the year, with an average of 12h and 18min of daylight.On the first day of the month, sunrise is at 05:18 and sunset at 17:34. On the last day of December, sunrise is at 05:32 and sunset at 17:48 WIT.
Sunshine
The average sunshine in December is 7.2h.UV index
The months with the lowest UV index are January, February, June through August and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 6 in December interprets into the following advice:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Attention! The reflection of both water and sand can increase the intensity of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is December?
What is the average humidity in December?
What is the rainiest month?
How much does it rain in December?
What is the water temperature in December?
When are the longest days?
How many hours of daylight does Jayapura have in December?
When are sunrise and sunset in December in Jayapura?
How long on average sun shines in December?
What is the month with the lowest UV index in Jayapura?
What is the UV index intensity in December?
Average temperature in December
Jayapura, Indonesia
- Average high temperature in December: 29°C
The warmest months (with the highest average high temperature) are October and November (29.2°C).
The months with the lowest average high temperature are January and March (28.3°C).
- Average low temperature in December: 23.8°C
The month with the highest average low temperature is December (23.8°C).
The coldest months (with the lowest average low temperature) are July and August (22.8°C).
Average pressure in December
Jayapura, Indonesia
- Average pressure in December: 1008mbar
The months with the highest atmospheric pressure are August and September (1009.9mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in December
Jayapura, Indonesia
- Average wind speed in December: 7.5km/h
The windiest month (with the highest average wind speed) is March (9km/h).
The calmest month (with the lowest average wind speed) is May (6.7km/h).
Average humidity in December
Jayapura, Indonesia
- Average humidity in December: 85%
The month with the highest relative humidity is March (86%).
The months with the lowest relative humidity are September, October and November (83%).
Average rainfall in December
Jayapura, Indonesia
- Average rainfall in December: 261mm
The wettest month (with the highest rainfall) is December (261mm).
The driest month (with the least rainfall) is February (171mm).
Average rainfall days in December
Jayapura, Indonesia
- Average rainfall days in December: 28 days
The months with the highest number of rainy days are May and October (28.5 days).
The month with the least rainy days is February (23.6 days).
Average sea temperature in December
Jayapura, Indonesia
- Average sea temperature in December: 29.3°C
The best month for swimming (with the highest average sea temperature) is October (29.8°C).
The coldest months (with the lowest average sea temperature) are March and August (29.1°C).
Average daylight in December /
Average sunshine in December
Jayapura, Indonesia
- Average daylight in December: 12h and 2min
The month with the longest days is December (Average daylight: 12h and 18min).
The month with the shortest days is June (Average daylight: 12h and 0min).
- Average sunshine in December: 7h and 1min
The month with the most sunshine is May (Average sunshine: 8h and 12min).
The month with the least sunshine is March (Average sunshine: 6h and 48min).
Average sunshine days in December
Jayapura, Indonesia
- Average sunshine days in December: 2.5 days
The month with the most sunshine days is February (3.6 days).
The month with the least sunshine days is May (1.4 days).
Average UV index in December
Jayapura, Indonesia
- Average UV index in December: 6
The months with the highest UV index are March, April, May, September, October and November (UV index 7).
The months with the lowest UV index are January, February, June, July, August and December (UV index 6).
Average cloud cover in December
Jayapura, Indonesia
- Average cloud cover in December: 50
The month with the most cloud cover is March (Cloud cover 55).
The months with the least cloud cover are May, August and September (Cloud cover 44).
Average visibility in December
Jayapura, Indonesia
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
