December weather forecast
Batu, Indonesia

December, the first month of the summer in Batu, is still a hot month, with an average temperature ranging between min 23.6°C (74.5°F) and max 30.5°C (86.9°F).

Temperature

December's onset records an average high-temperature of a still hot 30.5°C (86.9°F), a near match to November's 32.1°C (89.8°F). During December, Batu records a consistent average nighttime temperature of 23.6°C (74.5°F).

Heat index

In December, the average heat index is appraised at a scorching 40°C (104°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Heat index details are generally centered around shaded locations and a mild breeze. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Batu, Indonesia, the average relative humidity in December is 81%.

Rainfall

In Batu, Indonesia, in December, during 24.8 rainfall days, 141mm (5.55") of precipitation is typically accumulated. In Batu, during the entire year, the rain falls for 223 days and collects up to 1083mm (42.64") of precipitation.

Daylight

The month with the longest days in Batu is December, with an average of 12h and 36min of daylight.
On the first day of the month, sunrise is at 05:02 and sunset at 17:35. On the last day of December, in Batu, sunrise is at 05:15 and sunset at 17:50 WIB.

Sunshine

The average sunshine in December in Batu is 7.7h.

UV index

April, June through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: During December, 7 as the daily maximum UV index converts into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.