December weather forecastKekaha, HI
December
Weather in December
Closing the year, December brings back the mild and inviting climate experienced at the start of the year in Kekaha, Hawaii. While there is a decrease in sea temperature from November, a relative increase in pressure is noted. With the days becoming shorter, the average daylight is reduced to 10.8 hours. However, a decrease in temperature and daylight does not deter the enjoyment of water activities and sightseeing. Overall, December continues to uphold the inviting weather appeal of Kekaha.Temperature
The average high-temperature in December, at a still moderately hot 75.7°F (24.3°C), reveals a modest deviation from November's 77.9°F (25.5°C). Kekaha's nighttime temperatures in December settle close to daytime highs at an average of 72.1°F (22.3°C).Humidity
The months with the highest humidity in Kekaha are February through April, June through August, October and December, with an average relative humidity of 75%.Rainfall
In Kekaha, during December, the rain falls for 14.6 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Kekaha, there are 172.7 rainfall days, and 15.75" (400mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 76.8°F (24.9°C).Note: When considering a person's aversion to cold, factors like sunshine, wind, and atmospheric temperature are key. Swimming in 76.8°F (24.9°C) might be delightful. (Remember: The Olympics' swimming events have water temperatures between 77°F (25°C) and 82.4°F (28°C).)
Daylight
The month with the shortest days in Kekaha is December, with an average of 10h and 48min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 5:54 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 6:06 pm HST.
Sunshine
The average sunshine in December is 7.5h.UV index
The months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum UV index, 6 during December, leads to the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days. Notice! The Sun's UV exposure elevates with sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kekaha, HI
- Average high temperature in December: 75.7°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The months with the lowest average high temperature are February and March (73.4°F).
- Average low temperature in December: 72.1°F
The month with the highest average low temperature is September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in December
Kekaha, HI
- Average pressure in December: 30.01"Hg
The months with the highest atmospheric pressure are March and April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed in December
Kekaha, HI
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is March (10.7mph).
The calmest month (with the lowest average wind speed) is May (8.6mph).
Average humidity in December
Kekaha, HI
- Average humidity in December: 75%
The months with the highest relative humidity are February, March, April, June, July, August, October and December (75%).
The months with the lowest relative humidity are January, May, September and November (74%).
Average rainfall in December
Kekaha, HI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is March (2.2").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in December
Kekaha, HI
- Average rainfall days in December: 14.6 days
The month with the highest number of rainy days is March (16.8 days).
The month with the least rainy days is January (11.5 days).
Average sea temperature in December
Kekaha, HI
- Average sea temperature in December: 76.8°F
The best month for swimming (with the highest average sea temperature) is September (80.5°F).
The coldest month (with the lowest average sea temperature) is March (75.4°F).
Average daylight in December /
Average sunshine in December
Kekaha, HI
- Average daylight in December: 10h and 48min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in December: 7h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is November (Average sunshine: 7h and 6min).
Average sunshine days in December
Kekaha, HI
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is January (13.8 days).
The month with the least sunshine days is November (6.7 days).
Average UV index in December
Kekaha, HI
- Average UV index in December: 6
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in December
Kekaha, HI
- Average cloud cover in December: 31
The month with the most cloud cover is March (Cloud cover 35).
The months with the least cloud cover are January and September (Cloud cover 28).
Average visibility in December
Kekaha, HI
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
