December weather forecast
Petir, Indonesia

December, the first month of the summer in Petir, is also a hot month, with an average temperature ranging between max 30.4°C (86.7°F) and min 24.6°C (76.3°F).

Temperature

Welcoming December, Petir notes an average high-temperature of a still hot 30.4°C (86.7°F), nearly consistent with November's 31.2°C (88.2°F). Petir, in December, observes a steady average low-temperature of 24.6°C (76.3°F).

Heat index

December's average heat index is appraised at a sweltering 38°C (100.4°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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', evaluates the perceived heat by adding the effect of moisture in the air. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The average relative humidity in December is 77%.

Rainfall

In Petir, during December, the rain falls for 27.5 days and regularly aggregates up to 156mm (6.14") of precipitation. Throughout the year, in Petir, Indonesia, there are 292.5 rainfall days, and 1468mm (57.8") of precipitation is accumulated.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:30 and sunset at 17:58. On the last day of December, in Petir, sunrise is at 05:43 and sunset at 18:12 WIB.

Sunshine

With an average of 9.2h of sunshine, December has the most sunshine of the year in Petir, Indonesia.

UV index

The months with the highest UV index in Petir are February through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 7 during December translates into the following guidance:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.