December weather forecastWaimanalo, HI
December
Weather in December
The first month of the winter, December, is still a warm month in Waimanalo, Hawaii, with an average temperature ranging between min 73.2°F (22.9°C) and max 75.9°F (24.4°C).Temperature
December records an average high-temperature of a still warm 75.9°F (24.4°C), indicating a minor variation from the preceding month. During December, the nighttime temperatures align closely with the daytime averages, measuring a pleasant 73.2°F (22.9°C).Humidity
April, June through August and December, with an average relative humidity of 76%, are the most humid months in Waimanalo.Rainfall
In Waimanalo, in December, during 14.9 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 169.9 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 54min of daylight.On the first day of the month, sunrise is at 6:52 am and sunset at 5:47 pm. On the last day of December, in Waimanalo, sunrise is at 7:08 am and sunset at 6:00 pm HST.
Sunshine
December has the least sunshine of the year in Waimanalo, with an average of 6.6h of sunshine.UV index
January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the UV index of 6 transforms into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Waimanalo, HI
- Average high temperature in December: 75.9°F
The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).
- Average low temperature in December: 73.2°F
The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).
Average pressure in December
Waimanalo, HI
- Average pressure in December: 30"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in December
Waimanalo, HI
- Average wind speed in December: 12mph
The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).
Average humidity in December
Waimanalo, HI
- Average humidity in December: 76%
The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Waimanalo, HI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in December
Waimanalo, HI
- Average rainfall days in December: 14.9 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).
Average daylight in December /
Average sunshine in December
Waimanalo, HI
- Average daylight in December: 10h and 54min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in December: 6h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Waimanalo, HI
- Average sunshine days in December: 8.1 days
The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).
Average UV index in December
Waimanalo, HI
- Average UV index in December: 6
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in December
Waimanalo, HI
- Average cloud cover in December: 32
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).
Average visibility in December
Waimanalo, 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).
