December weather forecastBontang, Indonesia
December weather forecast for Bontang, Indonesia: The first month of the winter, December, is still a tropical month in Bontang, Indonesia, with an average temperature varying between 30.2°C (86.4°F) and 25.3°C (77.5°F). In December, the average heat index, which combines air temperature and relative humidity, is calculated to be 38°C (100.4°F).
December
Weather in December
The first month of the winter, December, is still a tropical month in Bontang, Indonesia, with an average temperature varying between 30.2°C (86.4°F) and 25.3°C (77.5°F).Temperature
Bontang registers an average high-temperature of a still tropical 30.2°C (86.4°F) with the arrival of December, showing minor deviation from the preceding month. A modest decline from daytime high temperatures is noticed in December, marking the average low at a warm 25.3°C (77.5°F).Heat index
The heat index for December is calculated to be a very hot 38°C (100.4°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.Note that heat index values are valued for light wind and location in the shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', binds temperature metrics with humidity values to give a sense of the actual warmth. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.
Humidity
The months with the highest humidity are January and December, with an average relative humidity of 80%.Rainfall
December is the month with the most rainfall. Rain falls for 25 days and accumulates 129mm (5.08") of precipitation.Sea temperature
In December, the average sea temperature is 29°C (84.2°F).Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) provides warmth and pleasure, making water activities enjoyable for lengthened periods without feeling uncomfortable.
Daylight
The average length of the day in December is 12h and 7min.On the first day of the month, sunrise is at 05:55 and sunset at 18:02. On the last day of December, in Bontang, sunrise is at 06:09 and sunset at 18:16 WITA.
Sunshine
In Bontang, Indonesia, the average sunshine in December is 8.5h.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 of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: In December, a regular UV index of 7 translates into these guidelines:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Heed this! UV intensity is much stronger when reflected off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Bontang, Indonesia
- Average high temperature in December: 30.2°C
The warmest month (with the highest average high temperature) is October (31.1°C).
The month with the lowest average high temperature is January (29.8°C).
- Average low temperature in December: 25.3°C
The month with the highest average low temperature is May (25.7°C).
The coldest months (with the lowest average low temperature) are August and September (24.8°C).
Average pressure in December
Bontang, Indonesia
- Average pressure in December: 1008.4mbar
The month with the highest atmospheric pressure is September (1009.7mbar).
The months with the lowest atmospheric pressure are November and December (1008.4mbar).
Average wind speed in December
Bontang, Indonesia
- Average wind speed in December: 7.8km/h
The windiest month (with the highest average wind speed) is August (10.2km/h).
The calmest months (with the lowest average wind speed) are May and November (7.6km/h).
Average humidity in December
Bontang, Indonesia
- Average humidity in December: 80%
The months with the highest relative humidity are January and December (80%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Bontang, Indonesia
- Average rainfall in December: 129mm
The wettest month (with the highest rainfall) is December (129mm).
The driest month (with the least rainfall) is September (53mm).
Average rainfall days in December
Bontang, Indonesia
- Average rainfall days in December: 25 days
The month with the highest number of rainy days is January (25.3 days).
The month with the least rainy days is September (18.2 days).
Average sea temperature in December
Bontang, Indonesia
- Average sea temperature in December: 29°C
The best month for swimming (with the highest average sea temperature) is May (29.8°C).
The coldest month (with the lowest average sea temperature) is February (28.4°C).
Average daylight in December /
Average sunshine in December
Bontang, Indonesia
- Average daylight in December: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is October (Average daylight: 12h and 6min).
- Average sunshine in December: 8h and 30min
The month with the most sunshine is September (Average sunshine: 9h and 30min).
The month with the least sunshine is January (Average sunshine: 7h and 48min).
Average sunshine days in December
Bontang, Indonesia
- Average sunshine days in December: 5.1 days
The month with the most sunshine days is September (9.2 days).
The month with the least sunshine days is January (4.8 days).
Average UV index in December
Bontang, 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
Bontang, Indonesia
- Average cloud cover in December: 45
The month with the most cloud cover is January (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in December
Bontang, 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).
