Average Weather in Waimea Hawaii, United States
The climate in Waimea is warm, humid, windy, and mostly clear. Over the course of the year, the temperature typically varies from 66°F to 85°F and is rarely below 61°F or above 87°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, 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 Waimea, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Waimea begins around December 11 and lasts for 4.2 months, ending around April 17. On January 17, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 80% of the time, and overcast or mostly cloudy 20% of the time.
The cloudier part of the year begins around April 17 and lasts for 7.8 months, ending around December 11. On October 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 42% of the time, and clear, mostly clear, or partly cloudy 58% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Waimea varies throughout the year.
The wetter season lasts 6.9 months, from October 6 to May 4, with a greater than 19% chance of a given day being a wet day. The chance of a wet day peaks at 29% on December 24.
The drier season lasts 5.1 months, from May 4 to October 6. The smallest chance of a wet day is 8% on June 4.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 29% on December 24.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Waimea experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Waimea. The most rain falls during the 31 days centered around January 14, with an average total accumulation of 4.5 inches.
The least rain falls around June 11, with an average total accumulation of 0.8 inches.
Average Monthly Rainfall
The length of the day in Waimea varies over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 48 minutes of daylight; the longest day is June 20, with 13 hours, 29 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:54 AM on June 7, and the latest sunrise is 1 hour, 25 minutes later at 7:19 AM on January 15. The earliest sunset is at 5:54 PM on November 26, and the latest sunset is 1 hour, 32 minutes later at 7:26 PM on July 3.
Daylight saving time (DST) is not observed in Waimea during 2017.
Sunrise & Sunset with Twilight
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
Waimea experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 7.6 months, from May 6 to December 25, during which time the comfort level is muggy, oppressive, or miserable at least 35% of the time. The muggiest day of the year is October 2, with muggy conditions 77% of the time.
The least muggy day of the year is March 9, with muggy conditions 20% of the time.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Waimea experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 2.7 months, from June 5 to August 27, with average wind speeds of more than 7.7 miles per hour. The windiest day of the year is July 3, with an average hourly wind speed of 8.6 miles per hour.
The calmer time of year lasts for 9.3 months, from August 27 to June 5. The calmest day of the year is January 4, with an average hourly wind speed of 6.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Waimea is from the east throughout the year.
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 water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 3.3 months, from July 28 to November 6, with an average temperature above 79°F. The day of the year with the warmest water is September 20, with an average temperature of 80°F.
The time of year with cooler water lasts for 3.8 months, from January 5 to April 29, with an average temperature below 76°F. The day of the year with the coolest water is February 16, with an average temperature of 75°F.
Average Water Temperature
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.
The brighter period of the year lasts for 4.5 months, from April 13 to August 28, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is June 2, with an average of 7.6 kWh.
The darker period of the year lasts for 2.9 months, from November 4 to February 1, with an average daily incident shortwave energy per square meter below 4.9 kWh. The darkest day of the year is December 13, with an average of 4.2 kWh.
Average Daily Incident Shortwave Solar Energy
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, 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).
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.