December weather forecast
Boyolali, Indonesia

December, the first month of the summer in Boyolali, is still a hot month, with an average temperature fluctuating between 30.7°C (87.3°F) and 25°C (77°F).

Temperature

The transition from November to December sees average high-temperatures adjusting to a still hot 30.7°C (87.3°F), from a not significantly different 32.1°C (89.8°F). Boyolali usually reports an average low-temperature of 25°C (77°F) during the month of December.

Heat index

The heat index in December is appraised at an extremely hot 40°C (104°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Always consider that heat index estimations are for light winds and places in the shade. Direct sunlight can cause a surge in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. 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.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The average relative humidity in December is 79%.

Rainfall

In Boyolali, during December, the rain falls for 26.3 days and regularly aggregates up to 159mm (6.26") of precipitation. Throughout the year, there are 240.7 rainfall days, and 1143mm (45") 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 the month, sunrise is at 05:10 and sunset at 17:42. On the last day of December, sunrise is at 05:24 and sunset at 17:57 WIB.

Sunshine

With an average of 7.8h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index in Boyolali are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Boyolali are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A maximum daily UV index of 7 during December morphs into the following directions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.