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April Weather in Waihee-Waiehu Hawaii, United States

Daily high temperatures are around 82°F, rarely falling below 77°F or exceeding 86°F.

Daily low temperatures are around 67°F, rarely falling below 62°F or exceeding 71°F.

For reference, on August 26, the hottest day of the year, temperatures in Waihee-Waiehu typically range from 72°F to 87°F, while on January 27, the coldest day of the year, they range from 64°F to 80°F.

Average High and Low Temperature in April in Waihee-Waiehu

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April in Waihee-Waiehu

Average Hourly Temperature in April in Waihee-WaiehuApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMayNowNowcomfortablecomfortablewarm
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Altamira, Dominican Republic (5,480 miles away) and Vázquez, Puerto Rico (5,802 miles) are the far-away foreign places with temperatures most similar to Waihee-Waiehu (view comparison).

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The month of April in Waihee-Waiehu experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 32% throughout the month. The highest chance of overcast or mostly cloudy conditions is 34% on April 23.

The clearest day of the month is April 11, with clear, mostly clear, or partly cloudy conditions 69% of the time.

For reference, on October 30, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on January 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%.

Cloud Cover Categories in April in Waihee-Waiehu

Cloud Cover Categories in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayJan 1878%Jan 1878%Apr 169%Apr 169%Apr 3067%Apr 3067%Apr 1169%Apr 1169%Apr 2166%Apr 2166%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Waihee-Waiehu, the chance of a wet day over the course of April is gradually decreasing, starting the month at 17% and ending it at 14%.

For reference, the year's highest daily chance of a wet day is 23% on January 14, and its lowest chance is 7% on June 19.

Probability of Precipitation in April in Waihee-Waiehu

Probability of Precipitation in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%22%22%MarMayApr 117%Apr 117%Apr 3014%Apr 3014%Apr 1115%Apr 1115%Apr 2116%Apr 2116%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during April in Waihee-Waiehu is gradually decreasing, starting the month at 1.6 inches, when it rarely exceeds 4.4 inches, and ending the month at 1.2 inches, when it rarely exceeds 2.5 inches.

Average Monthly Rainfall in April in Waihee-Waiehu

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of April in Waihee-Waiehu, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 33 minutes, implying an average daily increase of 1 minute, 7 seconds, and weekly increase of 7 minutes, 51 seconds.

The shortest day of the month is April 1, with 12 hours, 22 minutes of daylight and the longest day is April 30, with 12 hours, 55 minutes of daylight.

Hours of Daylight and Twilight in April in Waihee-Waiehu

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The latest sunrise of the month in Waihee-Waiehu is 6:18 AM on April 1 and the earliest sunrise is 23 minutes earlier at 5:55 AM on April 30.

The earliest sunset is 6:40 PM on April 1 and the latest sunset is 10 minutes later at 6:50 PM on April 30.

Daylight saving time is not observed in Waihee-Waiehu during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:45 AM and sets 13 hours, 24 minutes later, at 7:10 PM, while on December 21, the shortest day of the year, it rises at 6:58 AM and sets 10 hours, 52 minutes later, at 5:50 PM.

Sunrise & Sunset with Twilight in April in Waihee-Waiehu

Sunrise & Sunset with Twilight in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay5:55 AM5:55 AMApr 306:50 PMApr 306:50 PM6:18 AM6:18 AMApr 16:40 PMApr 16:40 PM6:09 AM6:09 AMApr 116:44 PMApr 116:44 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in April in Waihee-Waiehu

Solar Elevation and Azimuth in April in Waihee-WaiehuApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMay00101020202030304040505050606070800001010202030303040405050606060707080NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for April 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in April in Waihee-Waiehu

Moon Rise, Set & Phases in April in Waihee-WaiehuApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 911:01 PMMar 911:01 PMMar 249:01 PMMar 249:01 PMApr 88:22 AMApr 88:22 AMApr 231:50 PMApr 231:50 PMMay 75:23 PMMay 75:23 PMMay 233:54 AMMay 233:54 AM6:21 AM6:21 AM6:18 PM6:18 PM6:30 PM6:30 PM6:43 AM6:43 AM6:11 AM6:11 AM7:06 PM7:06 PM6:55 PM6:55 PM6:22 AM6:22 AM5:25 AM5:25 AM6:55 PM6:55 PM6:38 PM6:38 PM5:42 AM5:42 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%12:49 AMESE11:39 AMWSW-6:14 AMS237,098 mi
2
44%1:46 AMESE12:42 PMWSW-7:14 AMS233,719 mi
3
32%2:39 AMESE1:47 PMWSW-8:13 AMS230,378 mi
4
22%3:27 AMESE2:52 PMWSW-9:10 AMS227,346 mi
5
12%4:11 AMESE3:56 PMWSW-10:04 AMS224,926 mi
6
5%4:52 AME5:00 PMW-10:55 AMS223,404 mi
7
1%5:31 AME6:03 PMW-11:46 AMS222,995 mi
8
0%6:11 AME7:06 PMWNW-12:36 PMS223,798 mi
9
2%6:52 AMENE8:11 PMWNW-1:29 PMS225,769 mi
10
7%7:36 AMENE9:16 PMWNW-2:24 PMN228,719 mi
11
15%8:25 AMENE10:21 PMWNW-3:21 PMN232,356 mi
12
24%9:17 AMENE11:24 PMWNW-4:20 PMN236,325 mi
13
34%10:14 AMENE--5:18 PMN240,276 mi
14
44%-12:22 AMWNW11:12 AMENE6:14 PMN243,902 mi
15
50%-1:13 AMWNW12:09 PMENE7:06 PMN246,976 mi
16
64%-1:58 AMWNW1:05 PMENE7:53 PMN249,356 mi
17
73%-2:38 AMWNW1:58 PMENE8:37 PMS250,979 mi
18
81%-3:13 AMWNW2:49 PMENE9:19 PMS251,850 mi
19
88%-3:45 AMW3:38 PME9:58 PMS252,025 mi
20
94%-4:15 AMW4:26 PME10:36 PMS251,591 mi
21
98%-4:45 AMW5:14 PME11:15 PMS250,651 mi
22
100%-5:15 AMW6:03 PME11:55 PMS249,310 mi
23
100%-5:47 AMWSW6:55 PMESE--
24
100%-6:22 AMWSW7:49 PMESE12:38 AMS247,659 mi
25
98%-7:02 AMWSW8:46 PMESE1:25 AMS245,769 mi
26
94%-7:46 AMWSW9:45 PMESE2:15 AMS243,691 mi
27
88%-8:37 AMWSW10:44 PMESE3:10 AMS241,454 mi
28
80%-9:33 AMWSW11:41 PMESE4:09 AMS239,082 mi
29
70%-10:34 AMWSW-5:08 AMS236,606 mi
30
59%12:34 AMESE11:37 AMWSW-6:06 AMS234,086 mi

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.

The chance that a given day will be muggy in Waihee-Waiehu is gradually increasing during April, rising from 32% to 34% over the course of the month.

For reference, on August 16, the muggiest day of the year, there are muggy conditions 84% of the time, while on February 18, the least muggy day of the year, there are muggy conditions 27% of the time.

Humidity Comfort Levels in April in Waihee-Waiehu

Humidity Comfort Levels in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 132%Apr 132%Apr 3034%Apr 3034%Apr 1131%Apr 1131%Apr 2132%Apr 2132%NowNowmuggymuggyhumidhumidcomfortablecomfortabledrydryoppressiveoppressive
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Waihee-Waiehu is essentially constant during April, remaining within 0.3 miles per hour of 14.8 miles per hour throughout.

For reference, on June 25, the windiest day of the year, the daily average wind speed is 15.9 miles per hour, while on January 12, the calmest day of the year, the daily average wind speed is 11.6 miles per hour.

The highest daily average wind speed during April is 15.1 miles per hour on April 8.

Average Wind Speed in April in Waihee-Waiehu

Average Wind Speed in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mphMarMayApr 815.1 mphApr 815.1 mphApr 3014.5 mphApr 3014.5 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Waihee-Waiehu throughout April is predominantly from the east, with a peak proportion of 88% on April 22.

Wind Direction in April in Waihee-Waiehu

Wind Direction in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNoweastnorthwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Waihee-Waiehu 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 Waihee-Waiehu is essentially constant during April, remaining around 76°F throughout.

Average Water Temperature in April in Waihee-Waiehu

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Waihee-Waiehu 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 April in Waihee-Waiehu

Time Spent in Various Temperature Bands and the Growing Season in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMay100%Apr 16100%Apr 16NowNowcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Waihee-Waiehu are rapidly increasing during April, increasing by 693°F, from 1,989°F to 2,682°F, over the course of the month.

Growing Degree Days in April in Waihee-Waiehu

Growing Degree Days in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930301,900°F1,900°F2,000°F2,000°F2,100°F2,100°F2,200°F2,200°F2,300°F2,300°F2,400°F2,400°F2,500°F2,500°F2,600°F2,600°F2,700°F2,700°F2,800°F2,800°FMarMayApr 11,989°FApr 11,989°FApr 302,682°FApr 302,682°FApr 112,225°FApr 112,225°FApr 212,462°FApr 212,462°FNowNow
The average growing degree days accumulated over the course of April, with 25th to 75th and 10th to 90th percentile bands.

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 in Waihee-Waiehu is gradually increasing during April, rising by 0.6 kWh, from 6.6 kWh to 7.2 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April in Waihee-Waiehu

Average Daily Incident Shortwave Solar Energy in April in Waihee-WaiehuApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMarMayApr 16.6 kWhApr 16.6 kWhApr 307.2 kWhApr 307.2 kWhApr 116.9 kWhApr 116.9 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Waihee-Waiehu are 20.930 deg latitude, -156.505 deg longitude, and 79 ft elevation.

The topography within 2 miles of Waihee-Waiehu contains very significant variations in elevation, with a maximum elevation change of 1,739 feet and an average elevation above sea level of 235 feet. Within 10 miles contains very significant variations in elevation (5,810 feet). Within 50 miles also contains extreme variations in elevation (10,069 feet).

The area within 2 miles of Waihee-Waiehu is covered by water (58%), trees (17%), and artificial surfaces (16%), within 10 miles by water (40%) and trees (23%), and within 50 miles by water (85%).

This report illustrates the typical weather in Waihee-Waiehu, 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 Waihee-Waiehu.

For each station, the records are corrected for the elevation difference between that station and Waihee-Waiehu 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 Waihee-Waiehu is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Waihee-Waiehu and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Waihee-Waiehu and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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