Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December in Kahului observes an average high-temperature of a still moderately hot 75.7°F (24.3°C), marking an insignificant difference from November's 77.7°F (25.4°C). Throughout the nights in December, Kahului notes an average low of 72.9°F (22.7°C), a small dip from the daytime peak.Humidity
The average relative humidity in December is 75%.Rainfall
The wettest months in Kahului are March and December, with an average 0.87" (22mm) of rainfall.Ocean temperature
In Kahului, in December, the average water temperature is 76.8°F (24.9°C).Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 76.8°F (24.9°C) water. (FYI: The Olympic swimming competition requires a water temperature between 77°F (25°C) and 82.4°F (28°C).)
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 6:46 am and sunset at 5:43 pm. On the last day of December, sunrise is at 7:02 am and sunset at 5:56 pm HST.
Sunshine
December has the least sunshine of the year, with an average of 7h of sunshine.UV index
The months with the lowest UV index are January through June, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: An average UV index of 6 in December transforms into this advice:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. 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. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Heed this! UV intensity is much stronger when reflected off sand and water.
Frequently asked questions
What is the average December temperature in Kahului?
What is the average humidity in December in Kahului?
What is the rainiest month in Kahului?
How much does it rain in Kahului in December?
What is the ocean temperature in December in Kahului?
What is the month with the shortest days in Kahului?
How many hours of daylight does Kahului have in December?
When are sunrise and sunset in December in Kahului?
What is the month with the least sunshine in Kahului?
How long on average sun shines in December in Kahului?
When is the lowest UV index in Kahului?
What is the UV index intensity in December in Kahului?
Average temperature in December
Kahului, 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
Kahului, 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
Kahului, 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
Kahului, 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
Kahului, 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
Kahului, 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 sea temperature in December
Kahului, HI
- Average sea temperature in December: 76.8°F
The best month for swimming (with the highest average sea temperature) is September (80°F).
The coldest month (with the lowest average sea temperature) is March (75.6°F).
Average daylight in December /
Average sunshine in December
Kahului, HI
- Average daylight in December: 10h and 5min
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
Kahului, 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
Kahului, 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
Kahului, 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
Kahului, 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).
Kahului, Hawaii, USA
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