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 snowfall days 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
As December takes its course, Haiku's average high-temperature registers at a still moderately hot 74.5°F (23.6°C), closely aligning with the preceding month. Haiku's average temperature during the nights of December is recorded at an agreeable 72°F (22.2°C).Humidity
In December, the average relative humidity is 77%.Rainfall
In Haiku, in December, it is raining for 13.8 days, with typically 1.5" (38mm) of accumulated precipitation. In Haiku, during the entire year, the rain falls for 136.7 days and collects up to 13.94" (354mm) of precipitation.Snowfall
January through August, October through December are months without snowfall in Haiku.Daylight
The month with the shortest days in Haiku is December, with an average of 10h and 54min of daylight.On the first day of December, sunrise is at 6:46 am and sunset at 5:43 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 5:55 pm HST.
Sunshine
The month with the least sunshine is December, with an average of 6.7h of sunshine.UV index
January through August, October through 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 risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 6 in December, converts into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Frequently asked questions
What is the usual temperature for Haiku in December?
What is the average humidity in December in Haiku?
How many days does it rain in December in Haiku?
When it does not snow in Haiku?
What is the month with the shortest days in Haiku?
How many hours of daylight does Haiku have in December?
When is the sunrise / sunset in December in Haiku?
What is the month with the least sunshine in Haiku?
How many hours of sunshine does Haiku have in December?
What are the months with the lowest UV index in Haiku?
What is the UV index intensity in December in Haiku?
Average temperature in December
Haiku, HI
- Average high temperature in December: 74.5°F
The warmest month (with the highest average high temperature) is September (79°F).
The month with the lowest average high temperature is March (72.9°F).
- Average low temperature in December: 72°F
The month with the highest average low temperature is September (76.1°F).
The coldest month (with the lowest average low temperature) is March (69.8°F).
Average pressure in December
Haiku, 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
Haiku, HI
- Average wind speed in December: 12.4mph
The windiest month (with the highest average wind speed) is June (14.4mph).
The calmest month (with the lowest average wind speed) is January (10.9mph).
Average humidity in December
Haiku, HI
- Average humidity in December: 77%
The months with the highest relative humidity are July and August (78%).
The months with the lowest relative humidity are January and February (76%).
Average rainfall in December
Haiku, HI
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in December
Haiku, HI
- Average rainfall days in December: 13.8 days
The month with the highest number of rainy days is March (14.1 days).
The month with the least rainy days is September (8.1 days).
Average snowfall days in December
Haiku, HI
- Average snowfall days in December: 0 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Haiku, 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: 6h and 4min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in December
Haiku, HI
- Average sunshine days in December: 13.3 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is November (11.2 days).
Average UV index in December
Haiku, HI
- Average UV index in December: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in December
Haiku, HI
- Average cloud cover in December: 29
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is September (Cloud cover 23).
Average visibility in December
Haiku, 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).
Haiku, Hawaii, USA
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