1. WeatherSpark.com
  2. United States
  3. Hawaii
  4. Honolulu

Average Weather in Honolulu Hawaii, United States

In Honolulu, the summers are hot, oppressive, and dry; the winters are comfortable and humid; and it is windy and mostly clear year round. Over the course of the year, the temperature typically varies from 68°F to 87°F and is rarely below 63°F or above 89°F.

Climate Summary

warmhotwarmJanFebMarAprMayJunJulAugSepOctNovDec79%79%59%59%clearovercastprecipitation: 2.6 inprecipitation: 2.6 in0.3 in0.3 inmuggy: 93%muggy: 93%29%29%beach/pool score: 8.5beach/pool score: 8.55.85.8
Click on each chart for more information.

Based on the beach/pool score, the best time of year to visit Honolulu for hot-weather activities is from mid May to mid October.

Temperature

The hot season lasts for 3.6 months, from June 27 to October 14, with an average daily high temperature above 85°F. The hottest day of the year is August 23, with an average high of 87°F and low of 76°F.

The cool season lasts for 3.6 months, from December 13 to April 1, with an average daily high temperature below 81°F. The coldest day of the year is January 28, with an average low of 68°F and high of 79°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in HonoluluJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMcomfortablecomfortablecomfortablewarmhotcomfortable
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Suva, Fiji (3,166 miles away) is the far-away foreign place with temperatures most similar to Honolulu (view comparison).

Clouds

In Honolulu, 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 Honolulu begins around December 8 and lasts for 4.3 months, ending around April 17. On January 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 79% of the time, and overcast or mostly cloudy 21% of the time.

The cloudier part of the year begins around April 17 and lasts for 7.7 months, ending around December 8. On October 31, the cloudiest day of the year, the sky is overcast or mostly cloudy 41% of the time, and clear, mostly clear, or partly cloudy 59% of the time.

Cloud Cover Categories

Cloud Cover Categories in HonoluluclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jan 1879%Jan 1879%Oct 3159%Oct 3159%Dec 868%Dec 868%Apr 1769%Apr 1769%clearmostly clearmostly cloudyovercastpartly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Honolulu varies throughout the year.

The wetter season lasts 5.5 months, from October 15 to March 31, with a greater than 16% chance of a given day being a wet day. The chance of a wet day peaks at 25% on January 11.

The drier season lasts 6.5 months, from March 31 to October 15. The smallest chance of a wet day is 6% on June 20.

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 25% on January 11.

Daily Chance of Precipitation

Daily Chance of Precipitation in HonoluluwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 1125%Jan 1125%Jun 206%Jun 206%Jan 124%Jan 124%Oct 1516%Oct 1516%Mar 3116%Mar 3116%rain
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 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. Honolulu experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 11 months, from July 6 to May 27, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around January 1, with an average total accumulation of 2.6 inches.

The rainless period of the year lasts for 1.4 months, from May 27 to July 6. The least rain falls around June 12, with an average total accumulation of 0.3 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Sun

The length of the day in Honolulu varies over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 50 minutes of daylight; the longest day is June 20, with 13 hours, 26 minutes of daylight.

Hours of Daylight and Twilight

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 earliest sunrise is at 5:48 AM on June 6, and the latest sunrise is 1 hour, 23 minutes later at 7:11 AM on January 15. The earliest sunset is at 5:48 PM on November 26, and the latest sunset is 1 hour, 29 minutes later at 7:17 PM on July 3.

Daylight saving time (DST) is not observed in Honolulu during 2017.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in HonoluluJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 65:48 AMJun 65:48 AM7:17 PMJul 37:17 PMJul 3Nov 265:48 PMNov 265:48 PM7:11 AMJan 157:11 AMJan 15daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

Humidity

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.

Honolulu experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.5 months, from May 11 to December 28, during which time the comfort level is muggy, oppressive, or miserable at least 45% of the time. The muggiest day of the year is September 21, with muggy conditions 93% of the time.

The least muggy day of the year is March 9, with muggy conditions 29% of the time.

Humidity Comfort Levels

Humidity Comfort Levels in HonolulumuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Mar 929%Mar 929%93%Sep 2193%Sep 21May 1145%May 1145%Dec 2845%Dec 2845%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Honolulu experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 3.2 months, from May 31 to September 7, with average wind speeds of more than 14.4 miles per hour. The windiest day of the year is July 3, with an average hourly wind speed of 16.5 miles per hour.

The calmer time of year lasts for 8.8 months, from September 7 to May 31. The calmest day of the year is January 10, with an average hourly wind speed of 12.3 miles per hour.

Average Wind Speed

Average Wind Speed in HonoluluwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mph22 mphJul 316.5 mphJul 316.5 mphJan 1012.3 mphJan 1012.3 mphSep 714.4 mphSep 714.4 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Honolulu is from the east throughout the year.

Wind Direction

Wind Direction in HonoluluJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%eastnorthwestsouth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Honolulu 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 3.1 months, from August 2 to November 6, with an average temperature above 79°F. The day of the year with the warmest water is September 16, with an average temperature of 80°F.

The time of year with cooler water lasts for 4.1 months, from January 1 to May 6, 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

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

Best Time of Year to Visit

To characterize how pleasant the weather is in Honolulu throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Honolulu for general outdoor tourist activities is from mid November to mid August, with a peak score in the third week of January.

Tourism Score

Tourism Score in Honolulubest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468108.28.26.96.9 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Honolulu for hot-weather activities is from mid May to mid October, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in Honolulubest timeJanFebMarAprMayJunJulAugSepOctNovDec02468108.58.55.85.8 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

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 Honolulu 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

Time Spent in Various Temperature Bands and the Growing Season in HonoluluJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%100%Jan 1100%Jan 1100%Jul 3100%Jul 3comfortablewarmhotcool
The percentage of time spent in various temperature bands: 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 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.

Growing Degree Days

Growing Degree Days in HonoluluJanFebMarAprMayJunJulAugSepOctNovDec0°F2,000°F4,000°F6,000°F8,000°F10,000°FJan 590°FJan 590°FMar 201,800°FMar 201,800°FDec 319,778°FDec 319,778°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 4.7 months, from April 10 to September 2, with an average daily incident shortwave energy per square meter above 7.0 kWh. The brightest day of the year is June 9, with an average of 7.6 kWh.

The darker period of the year lasts for 2.8 months, from November 6 to January 31, with an average daily incident shortwave energy per square meter below 5.0 kWh. The darkest day of the year is December 20, with an average of 4.3 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Honolulu are 21.307 deg latitude, -157.858 deg longitude, and 23 ft elevation.

The topography within 2 miles of Honolulu contains significant variations in elevation, with a maximum elevation change of 810 feet and an average elevation above sea level of 79 feet. Within 10 miles contains significant variations in elevation (3,104 feet). Within 50 miles contains large variations in elevation (4,121 feet).

The area within 2 miles of Honolulu is covered by artificial surfaces (72%) and water (22%), within 10 miles by water (47%) and artificial surfaces (24%), and within 50 miles by water (91%).

Data Sources

This report illustrates the typical weather in Honolulu, 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 Honolulu.

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

The stations contributing to this reconstruction are: Honolulu International Airport (79%, 8 kilometers, west) and Marine Corps Air Station Kaneohe Bay (21%, 18 kilometers, northeast).

Other Data

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.

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.