December weather forecastKalaheo, HI
December
Weather in December
December, the first month of the winter in Kalaheo, is still a warm month, with an average temperature fluctuating between 71.8°F (22.1°C) and 75.4°F (24.1°C).Temperature
Kalaheo's average high-temperature marks a still warm 75.4°F (24.1°C) with the advent of December, closely mirroring that of the preceding month. Kalaheo sees a minor drop to an average minimum temperature of 71.8°F (22.1°C) during the night in the month of December.Humidity
The months with the highest humidity are June through August, October and December, with an average relative humidity of 77%.Rainfall
In Kalaheo, in December, during 18.1 rainfall days, 2.2" (56mm) of precipitation is typically accumulated. Throughout the year, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.Daylight
The month with the shortest days in Kalaheo is December, with an average of 10h and 48min of daylight.On the first day of December, sunrise is at 7:00 am and sunset at 5:54 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:06 pm HST.
Sunshine
In December, the average sunshine is 6.4h.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 estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 6 during December leads to these advisories:
Stay clear of intense sun exposure. Solar protection is of utmost significance. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kalaheo, HI
- Average high temperature in December: 75.4°F
The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).
- Average low temperature in December: 71.8°F
The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure in December
Kalaheo, HI
- Average pressure in December: 30.01"Hg
The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed in December
Kalaheo, HI
- Average wind speed in December: 11.2mph
The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).
Average humidity in December
Kalaheo, HI
- Average humidity in December: 77%
The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).
Average rainfall in December
Kalaheo, HI
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").
Average rainfall days in December
Kalaheo, HI
- Average rainfall days in December: 18.1 days
The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).
Average daylight in December /
Average sunshine in December
Kalaheo, 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: 6h and 24min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days in December
Kalaheo, HI
- Average sunshine days in December: 6.7 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).
Average UV index in December
Kalaheo, 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
Kalaheo, HI
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).
Average visibility in December
Kalaheo, 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).
