December weather forecastOlowalu, HI
December
Weather in December
The first month of the winter, December, is also a moderately hot month in Olowalu, Hawaii, with an average temperature varying between 75.7°F (24.3°C) and 72.9°F (22.7°C).Temperature
The advent of December denotes an average high-temperature of a still warm 75.7°F (24.3°C), subtly different from November's 77.7°F (25.4°C). Olowalu's temperature during December nights registers a minor decrease to an average low of 72.9°F (22.7°C).Humidity
The average relative humidity in December in Olowalu is 75%.Rainfall
The wettest months are March and December, with an average 0.87" (22mm) of rainfall.Daylight
With an average of 10h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:47 am and sunset at 5:44 pm. On the last day of December, sunrise is at 7:03 am and sunset at 5:56 pm HST.
Sunshine
The month with the least sunshine is December, with an average of 7h 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 reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 6 in December interprets into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Olowalu, HI
- Average high temperature in December: 75.7°F
The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).
- Average low temperature in December: 72.9°F
The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).
Average pressure in December
Olowalu, HI
- Average pressure in December: 29.99"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in December
Olowalu, HI
- Average wind speed in December: 11.7mph
The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).
Average humidity in December
Olowalu, HI
- Average humidity in December: 75%
The months with the highest relative humidity are July and August (76%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall in December
Olowalu, HI
- Average rainfall in December: 0.87"
The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days in December
Olowalu, HI
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).
Average daylight in December /
Average sunshine in December
Olowalu, 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: 7h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days in December
Olowalu, HI
- Average sunshine days in December: 17.7 days
The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).
Average UV index in December
Olowalu, 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
Olowalu, HI
- Average cloud cover in December: 24
The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are June and September (Cloud cover 21).
Average visibility in December
Olowalu, 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).
