December weather forecast and climate
Kīholo, HI

The first month of the winter, December, is also a moderately hot month in Kīholo, Hawaii, with average temperature ranging between max 74.8°F (23.8°C) and min 71.1°F (21.7°C).

Temperature

In Kīholo, the average high-temperature is almost the same as in November - a still moderately hot 74.8°F (23.8°C). In Kīholo, the average low-temperature is 71.1°F (21.7°C).

Humidity

In Kīholo, the average relative humidity in December is 73%.

Rainfall

In Kīholo, in December, during 9.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated. Throughout the year, there are 136 rainfall days, and 8.5" (216mm) of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 10.9h of daylight.

Sunshine

December has the least sunshine of the year in Kīholo, with an average of 7.4h of sunshine.

UV index

Months with the highest UV index in Kīholo are January through December, with an average maximum UV index of 6. Months with the lowest UV index are January through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.