Average Weather in December in Waimea Hawaii, United States
Daily high temperatures are around 80°F, rarely falling below 77°F or exceeding 83°F.
Daily low temperatures decrease by 2°F, from 69°F to 67°F, rarely falling below 62°F or exceeding 72°F.
For reference, on September 17, the hottest day of the year, temperatures in Waimea typically range from 74°F to 85°F, while on January 31, the coldest day of the year, they range from 66°F to 78°F.
Average High and Low Temperature in December
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in December
The month of December in Waimea experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 33% to 21%.
The clearest day of the month is December 31, with clear, mostly clear, or partly cloudy conditions 79% of the time.
For reference, on October 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on January 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.
Cloud Cover Categories in December
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Waimea, the chance of a wet day over the course of December is gradually increasing, starting the month at 25% and ending it at 28%.
For reference, the year's highest daily chance of a wet day is 29% on December 24, and its lowest chance is 8% on June 4.
Probability of Precipitation in December
The average sliding 31-day rainfall during December in Waimea is rapidly increasing, starting the month at 3.3 inches, when it rarely exceeds 8.8 inches or falls below 0.1 inches, and ending the month at 4.4 inches, when it rarely exceeds 11.7 inches or falls below 0.1 inches.
Average Monthly Rainfall in December
Over the course of December in Waimea, the length of the day is essentially constant. The shortest day of the month is December 21, with 10 hours, 48 minutes of daylight and the longest day is December 1, with 10 hours, 53 minutes of daylight.
Hours of Daylight and Twilight in December
The earliest sunrise of the month in Waimea is 7:01 AM on December 1 and the latest sunrise is 16 minutes later at 7:17 AM on December 31.
The earliest sunset is 5:54 PM on December 1 and the latest sunset is 12 minutes later at 6:06 PM on December 31.
Daylight saving time is not observed in Waimea during 2018.
For reference, on June 21, the longest day of the year, the Sun rises at 5:56 AM and sets 13 hours, 29 minutes later, at 7:24 PM, while on December 21, the shortest day of the year, it rises at 7:13 AM and sets 10 hours, 48 minutes later, at 6:00 PM.
Sunrise & Sunset with Twilight in December
The chance that a given day will be muggy in Waimea is decreasing during December, falling from 39% to 33% over the course of the month.
For reference, on October 2, the muggiest day of the year, there are muggy conditions 77% of the time, while on March 9, the least muggy day of the year, there are muggy conditions 20% of the time.
Humidity Comfort Levels in December
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Waimea is decreasing during December, decreasing from 14.7 miles per hour to 12.9 miles per hour over the course of the month.
For reference, on July 3, the windiest day of the year, the daily average wind speed is 16.0 miles per hour, while on January 4, the calmest day of the year, the daily average wind speed is 12.8 miles per hour.
Average Wind Speed in December
Wind Direction in December
Waimea is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Waimea is essentially constant during December, remaining within 1°F of 77°F throughout.
Average Water Temperature in December
Temperatures in Waimea are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in December
The average accumulated growing degree days in Waimea are rapidly increasing during December, increasing by 706°F, from 8,712°F to 9,418°F, over the course of the month.
Growing Degree Days in December
The average daily incident shortwave solar energy in Waimea is essentially constant during December, remaining within 0.1 kWh of 4.3 kWh throughout.
The lowest average daily incident shortwave solar energy during December is 4.2 kWh on December 18.
Average Daily Incident Shortwave Solar Energy in December
For the purposes of this report, the geographical coordinates of Waimea are 21.957 deg latitude, -159.669 deg longitude, and 46 ft elevation.
The topography within 2 miles of Waimea contains very significant variations in elevation, with a maximum elevation change of 1,007 feet and an average elevation above sea level of 146 feet. Within 10 miles contains very significant variations in elevation (4,196 feet). Within 50 miles also contains extreme variations in elevation (5,240 feet).
The area within 2 miles of Waimea is covered by water (31%), shrubs (23%), cropland (19%), and grassland (18%), within 10 miles by water (45%) and shrubs (18%), and within 50 miles by water (92%).
This report illustrates the typical weather in Waimea year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Waimea.
For each station, the records are corrected for the elevation difference between that station and Waimea according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Waimea is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Waimea and a given station.
The stations contributing to this reconstruction are: Kekaha, Pacific Missile Test Facility Barking Sands (78%, 14 kilometers, northwest) and Lihue Airport (22%, 34 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .