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 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
Weather in December
Temperature
Sleman marks the onset of December with an average high-temperature of a still moderately hot 28.7°C (83.7°F), subtly divergent from November's 29°C (84.2°F). During the nights in December, Sleman experiences a consistent average temperature of 23.2°C (73.8°F).Heat index
The heat index value for December is appraised at a hot 34°C (93.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
Humidity
In Sleman, Indonesia, the average relative humidity in December is 82%.Rainfall
In Sleman, in December, during 29.4 rainfall days, 189mm (7.44") of precipitation is typically accumulated. Throughout the year, there are 294.6 rainfall days, and 1749mm (68.86") of precipitation is accumulated.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 05:11 and sunset at 17:43. On the last day of the month, sunrise is at 05:24 and sunset at 17:58 WIB.
Sunshine
With an average of 7.4h of sunshine, December has the least sunshine of the year in Sleman, Indonesia.UV index
The months with the lowest UV index are January, April through September, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In December, the maximum UV index of 6 translates into these guidelines:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
How hot does it get in Sleman in December?
What is the average humidity in December in Sleman?
How much does it rain in Sleman in December?
When are the longest days in Sleman?
How many hours of daylight does Sleman have in December?
When are sunrise and sunset in December in Sleman?
What is the month with the least sunshine in Sleman?
How many hours of sunshine does Sleman have in December?
What is the month with the lowest UV index in Sleman?
What is the UV index intensity in December in Sleman?
Average temperature in December
Sleman, Indonesia
- Average high temperature in December: 28.7°C
The warmest month (with the highest average high temperature) is October (29.3°C).
The month with the lowest average high temperature is July (27.7°C).
- Average low temperature in December: 23.2°C
The months with the highest average low temperature are January and November (23.3°C).
The coldest month (with the lowest average low temperature) is August (21°C).
Average pressure in December
Sleman, Indonesia
- Average pressure in December: 1009mbar
The months with the highest atmospheric pressure are August and September (1011.8mbar).
The month with the lowest atmospheric pressure is December (1009mbar).
Average wind speed in December
Sleman, Indonesia
- Average wind speed in December: 8.5km/h
The windiest month (with the highest average wind speed) is August (11.6km/h).
The calmest month (with the lowest average wind speed) is April (7km/h).
Average humidity in December
Sleman, Indonesia
- Average humidity in December: 82%
The months with the highest relative humidity are May and June (84%).
The months with the lowest relative humidity are September and October (80%).
Average rainfall in December
Sleman, Indonesia
- Average rainfall in December: 189mm
The wettest month (with the highest rainfall) is March (236mm).
The driest month (with the least rainfall) is August (29mm).
Average rainfall days in December
Sleman, Indonesia
- Average rainfall days in December: 29.4 days
The month with the highest number of rainy days is January (30.3 days).
The month with the least rainy days is August (13.8 days).
Average daylight in December /
Average sunshine in December
Sleman, Indonesia
- Average daylight in December: 12h and 4min
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 42min).
- Average sunshine in December: 7h and 2min
The month with the most sunshine is February (Average sunshine: 9h and 0min).
The month with the least sunshine is December (Average sunshine: 7h and 24min).
Average sunshine days in December
Sleman, Indonesia
- Average sunshine days in December: 0.8 days
The month with the most sunshine days is August (11.1 days).
The months with the least sunshine days are January and February (0.4 days).
Average UV index in December
Sleman, Indonesia
- Average UV index in December: 6
The months with the highest UV index are February, March and October (UV index 7).
The months with the lowest UV index are January, April, May, June, July, August, September, November and December (UV index 6).
Average cloud cover in December
Sleman, Indonesia
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are June, July and August (Cloud cover 38).
Average visibility in December
Sleman, Indonesia
- Average visibility in December: 9km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March, April, May, October, November and December (9km).
Sleman, Indonesia
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