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
December
Weather in December
Temperature
Sleman's December reports an average high-temperature of a still warm 28.7°C (83.7°F), exhibiting a minor difference from November. December witnesses an average low-temperature hovering around a still warm 23.2°C (73.8°F).Heat index
For most parts of December, the heat index is estimated at a hot 34°C (93.2°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
In December, the average relative humidity is 82%.Rainfall
In Sleman, Indonesia, in December, it is raining for 29.4 days, with typically 189mm (7.44") of accumulated precipitation. 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
The month with the least sunshine is December, with an average of 7.4h of sunshine.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 value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.Note: A maximum high daily UV index of 6 during December translates into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during December?
What is the average humidity in December in Sleman?
How many days does it rain in December?
When are the longest days in Sleman?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine in Sleman?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading 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).
