December weather forecastBertais, Indonesia

December

Weather in December

December, the first month of the summer in Bertais, is still a warm month, with an average temperature ranging between max 28.4°C (83.1°F) and min 26.1°C (79°F).

Temperature

During December, the average high-temperature is a still moderately hot 28.4°C (83.1°F), maintaining a close resemblance to that of the preceding month. Bertais, in the month of December, notes an average low temperature of 26.1°C (79°F), indicating a small decrease from the daytime highs.

Heat index

In December, the heat index is estimated at a hot 33°C (91.4°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Records show heat index calculations are tailored for shaded regions and mild winds. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', gives a temperature feeling by integrating air temperature and humidity. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The months with the highest humidity in Bertais are January through March, May through July, September and December, with an average relative humidity of 79%.

Rainfall

The month with the most rainfall is December, when the rain falls for 25.8 days and typically aggregates up to 165mm (6.5") of precipitation.

Daylight

With an average of 12h and 36min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:46 and sunset at 18:22. On the last day of the month, sunrise is at 05:59 and sunset at 18:36 WITA.

Sunshine

The average sunshine in December is 9.7h.

UV index

January through May, July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily high UV index of 7 in December leads to these guidelines:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.

Updated: Aug 11, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in December, in Bertais, is 28.4°C (83.1°F), while the low-temperature averages to 26.1°C (79°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in December is estimated at 33°C (91.4°F).

January through March, May through July, September and December, with an average relative humidity of 79%, are most humid months.

In Bertais, the average relative humidity in December is 79%.

December is the month with the most rainfall. Rain falls for 25.8 days and accumulates 165mm (6.5") of precipitation.

In Bertais, in December, it is raining for 25.8 days, with typically 165mm (6.5") of accumulated precipitation.

With an average of 12h and 36min of daylight, December has the longest days of the year.

In December, the average day length is 12h and 37min.

In December, on the first day of the month, sunrise is at 05:46 and sunset at 18:22. On the last day of the month, sunrise is at 05:59 and sunset at 18:36 WITA.

The average sunshine duration in December is 9.7h.

January through May, July through December, with an average maximum UV index of 7, are months with the highest UV index.

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.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

29°C

28.4°C

28.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.2km/h

10.8km/h

11.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

4.3

3.7

2.9

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Bertais, Indonesia

Average high temperature in December: 28.4°C

The warmest month (with the highest average high temperature) is November (29°C).
The months with the lowest average high temperature are July and August (27.3°C).

Average low temperature in December: 26.1°C

The month with the highest average low temperature is December (26.1°C).
The coldest month (with the lowest average low temperature) is August (23.2°C).

Average pressure in December
Bertais, Indonesia

Average pressure in December: 1008.3mbar

The month with the highest atmospheric pressure is August (1011.9mbar).
The month with the lowest atmospheric pressure is December (1008.3mbar).

Average wind speed in December
Bertais, Indonesia

Average wind speed in December: 10.1km/h

The windiest month (with the highest average wind speed) is July (13.3km/h).
The calmest month (with the lowest average wind speed) is April (7.6km/h).

Average humidity in December
Bertais, Indonesia

Average humidity in December: 79%

The months with the highest relative humidity are January, February, March, May, June, July, September and December (79%).
The month with the lowest relative humidity is October (77%).

Average rainfall in December
Bertais, Indonesia

Average rainfall in December: 165mm

The wettest month (with the highest rainfall) is December (165mm).
The driest month (with the least rainfall) is August (10mm).

Average rainfall days in December
Bertais, Indonesia

Average rainfall days in December: 25.8 days

The month with the highest number of rainy days is January (27.1 days).
The month with the least rainy days is August (10.3 days).

Average daylight in December /
Average sunshine in December
Bertais, Indonesia

Average daylight in December: 12h and 36min

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 36min).

Average sunshine in December: 9h and 42min

The month with the most sunshine is October (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 7h and 54min).

Average sunshine days in December
Bertais, Indonesia

Average sunshine days in December: 3.7 days

The month with the most sunshine days is August (16.1 days).
The month with the least sunshine days is January (2.9 days).

Average UV index in December
Bertais, Indonesia

Average UV index in December: 7

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

Average cloud cover in December
Bertais, Indonesia

Average cloud cover in December: 43

The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are August and September (Cloud cover 22).

Average visibility in December
Bertais, 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).