December weather forecast
Ketapang, Indonesia

The first month of the summer, December, is still a warm month in Ketapang, Indonesia, with an average temperature fluctuating between 26.4°C (79.5°F) and 29.3°C (84.7°F).

Temperature

December's commencement is accompanied by an average high-temperature of a still moderately hot 29.3°C (84.7°F), diverging marginally from November's 29.6°C (85.3°F). December nights in Ketapang witness a mild cool down to an average low of 26.4°C (79.5°F).

Heat index

December's average heat index is calculated to be a very hot 35°C (95°F). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.

Humidity

In December, the average relative humidity is 78%.

Rainfall

In December, the rain falls for 25.8 days. Throughout December, 190mm (7.48") of precipitation is accumulated. In Ketapang, during the entire year, the rain falls for 268.9 days and collects up to 1899mm (74.76") of precipitation.

Daylight

December has the longest days of the year, with an average of 12h and 12min of daylight.
On the first day of December, sunrise is at 05:22 and sunset at 17:35. On the last day of the month, sunrise is at 05:36 and sunset at 17:50 WIB.

Sunshine

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

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Ketapang are January through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum daily UV index of 7 during December morphs into the following directions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.