December weather forecastMandai, Indonesia
December
Weather in December
The first month of the summer, December, is also a moderately hot month in Mandai, Indonesia, with temperature in the range of an average low of 25.1°C (77.2°F) and an average high of 29.9°C (85.8°F).Temperature
An average high-temperature of a warm 29.9°C (85.8°F) marks December, exhibiting a close resemblance to the conditions in November. Mandai indicates a consistently low-temperature of 25.1°C (77.2°F) during the nights of December.Heat index
In December, the average heat index is computed to be a very hot 36°C (96.8°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is achieved by amalgamating air temperature with the relative humidity readings. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
In Mandai, the average relative humidity in December is 76%.Rainfall
In Mandai, during December, the rain falls for 22.5 days and regularly aggregates up to 106mm (4.17") of precipitation. Throughout the year, in Mandai, there are 194.6 rainfall days, and 840mm (33.07") of precipitation is accumulated.Daylight
The month with the longest days in Mandai is December, with an average of 12h and 24min of daylight.On the first day of the month, sunrise is at 05:38 and sunset at 18:02. On the last day of December, sunrise is at 05:52 and sunset at 18:17 WITA.
Sunshine
With an average of 10.2h of sunshine, December has the most sunshine of the year.UV index
February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index, 7 during December, leads to the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Mandai, Indonesia
- Average high temperature in December: 29.9°C
The warmest month (with the highest average high temperature) is October (32.2°C).
The month with the lowest average high temperature is January (29.1°C).
- Average low temperature in December: 25.1°C
The month with the highest average low temperature is November (25.5°C).
The coldest month (with the lowest average low temperature) is August (23°C).
Average pressure in December
Mandai, Indonesia
- Average pressure in December: 1008.3mbar
The month with the highest atmospheric pressure is August (1010.8mbar).
The month with the lowest atmospheric pressure is December (1008.3mbar).
Average wind speed in December
Mandai, Indonesia
- Average wind speed in December: 7.3km/h
The windiest month (with the highest average wind speed) is January (8.7km/h).
The calmest month (with the lowest average wind speed) is May (6.1km/h).
Average humidity in December
Mandai, Indonesia
- Average humidity in December: 76%
The months with the highest relative humidity are April and May (79%).
The month with the lowest relative humidity is October (66%).
Average rainfall in December
Mandai, Indonesia
- Average rainfall in December: 106mm
The wettest month (with the highest rainfall) is January (159mm).
The driest month (with the least rainfall) is September (10mm).
Average rainfall days in December
Mandai, Indonesia
- Average rainfall days in December: 22.5 days
The month with the highest number of rainy days is March (23.8 days).
The month with the least rainy days is August (4.9 days).
Average daylight in December /
Average sunshine in December
Mandai, Indonesia
- Average daylight in December: 12h and 24min
The month with the longest days is December (Average daylight: 12h and 24min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in December: 10h and 12min
The month with the most sunshine is December (Average sunshine: 10h and 12min).
The month with the least sunshine is May (Average sunshine: 6h and 48min).
Average sunshine days in December
Mandai, Indonesia
- Average sunshine days in December: 6.8 days
The month with the most sunshine days is August (25.1 days).
The month with the least sunshine days is March (4.1 days).
Average UV index in December
Mandai, Indonesia
- Average UV index in December: 7
The months with the highest UV index are February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is January (UV index 6).
Average cloud cover in December
Mandai, Indonesia
- Average cloud cover in December: 40
The month with the most cloud cover is January (Cloud cover 45).
The months with the least cloud cover are August and September (Cloud cover 16).
Average visibility in December
Mandai, 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).
