December weather forecast
Purwokerto, Indonesia

December, the first month of the summer in Purwokerto, is also a moderately hot month, with temperature in the range of an average high of 29.9°C (85.8°F) and an average low of 23.4°C (74.1°F).

Temperature

Purwokerto observes an average high-temperature of a moderately hot 29.9°C (85.8°F) in December, barely different from 30°C (86°F) in November. An average low-temperature of 23.4°C (74.1°F) marks the nights throughout December.

Heat index

December's heat index is evaluated at a fiery hot 37°C (98.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Purwokerto, the average relative humidity in December is 80%.

Rainfall

In Purwokerto, during December, the rain falls for 24.7 days and regularly aggregates up to 224mm (8.82") of precipitation. Throughout the year, in Purwokerto, there are 264.1 rainfall days, and 1894mm (74.57") of precipitation is accumulated.

Daylight

The month with the longest days is December, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 05:16 and sunset at 17:47. On the last day of December, in Purwokerto, sunrise is at 05:29 and sunset at 18:02 WIB.

Sunshine

The month with the least sunshine in Purwokerto is December, with an average of 7.4h of sunshine.

UV index

The months with the highest UV index in Purwokerto are February through April, October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.