December weather forecast
Bojonegoro, Indonesia

December, the first month of the summer in Bojonegoro, is also a hot month, with temperature in the range of an average low of 24.2°C (75.6°F) and an average high of 31.1°C (88°F).

Temperature

The arrival of December coincides with an average high-temperature of a still hot 31.1°C (88°F), indicating a minimal shift from November's 32.5°C (90.5°F). Bojonegoro's nights in December experience an average temperature drop to a warm 24.2°C (75.6°F).

Heat index

December's heat index is estimated at an extremely hot 42°C (107.6°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Observations indicate that the heat index values are for shady locations with light wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

The average relative humidity in December is 82%.

Rainfall

In Bojonegoro, in December, during 27.5 rainfall days, 162mm (6.38") of precipitation is typically accumulated. In Bojonegoro, during the entire year, the rain falls for 232.5 days and collects up to 1054mm (41.5") of precipitation.

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 05:06 and sunset at 17:36. On the last day of December, sunrise is at 05:19 and sunset at 17:51 WIB.

Sunshine

In December, the average sunshine is 7.5h.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In December, the UV index of 7 transforms into the following advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.