Hana
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Hana, HI

December, the first month of the winter, in Hana, is also a moderately hot month, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 79°F (26.1°C).

Temperature

In Hana, the average high-temperature in December is relatively the same as in November - a still warm 79°F (26.1°C). In December, the average low-temperature is 66.9°F (19.4°C).

Rainfall

In Hana, during December, the rain falls for 13 days and regularly aggregates up to 7" (178.1mm) of precipitation. In Hana, during the entire year, the rain falls for 171 days and collects up to 82.5" (2096.7mm) of precipitation.

Ocean temperature

In Hana, Hawaii, the average seawater temperature is 76.8°F (24.9°C).
Note: For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 76.8°F (24.9°C).

Daylight

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

Sunshine

November and December, with an average of 6h of sunshine, are months with the least sunshine.

UV index

December is the month with the lowest UV index in Hana, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in December in Hana?

The average high-temperature, in December, in Hana, is 79°F (26.1°C), while the average low-temperature is 66.9°F (19.4°C).

How many days does it rain in December in Hana?

In December, the rain falls for 13 days. Throughout December, 7" (178.1mm) of precipitation is accumulated.

What is the ocean temperature in December in Hana?

In Hana, in December, the average water temperature is 76.8°F (24.9°C). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 76.8°F (24.9°C) water may be enjoyable.

What is the month with the shortest days in Hana?

The month with the shortest days in Hana is December, with an average of 10.9h of daylight.

How many hours of daylight does Hana have in December?

In Hana, the average length of the day in December is 10.9h.

What is the month with the least sunshine in Hana?

Months with the least sunshine in Hana, Hawaii, are November and December, with an average of 6h of sunshine.

How long on average sun shines in December in Hana?

In December, the average sunshine is 6h.

When is the lowest UV index in Hana?

The month with the lowest UV index is December, with an average maximum UV index of 6.

How high is the UV index in December in Hana?

In December, the average daily maximum UV index in Hana, Hawaii, is 6. A UV Index of 6 to 7 symbolizes a high health risk from the exposure to the Sun's UV rays.
Average temperature in December - Hana, HI
  • Average high temperature in December: 26.1°C

Warmest months (with the highest average high temperature) are August and September (28.3°C).
Months with the lowest average high temperature are January, February and March (25.6°C).

  • Average low temperature in December: 19.4°C

The month with the highest average low temperature is August (22.2°C).
The coldest month (with the lowest average low temperature) is February (17.8°C).

Average rainfall in December - Hana, HI
  • Average rainfall in December: 178.1mm

The wettest month (with the highest rainfall) is March (241.8mm).
The driest month (with the lowest rainfall) is June (103.6mm).

Average rainfall days in December - Hana, HI
  • Average rainfall days in December: 13 days

Months with the highest number of rainy days are April, July and August (16 days).
Months with the lowest number of rainy days are January and February (12 days).

Average sea temperature in December - Hana, HI
  • Average sea temperature in December: 24.9°C

The best month for swimming (with the highest average sea temperature) is September (26.7°C).
The coldest month (with the lowest average sea temperature) is March (24.3°C).

Average daylight in December / Average sunshine in December - Hana, HI
  • Average daylight in December: 10.9h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in December: 6h

Months with most sunshine are June, July, August and September (Average sunshine: 8h).
Months with least sunshine are November and December (Average sunshine: 6).

Average UV index in December - Hana, HI
  • Average UV index in December: 6

Months with the highest UV index are June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).