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Average Weather at Honiara-Henderson International Airport Solomon Islands

The climate at Honiara-Henderson International Airport is hot, oppressive, windy, and overcast. Over the course of the year, the temperature typically varies from 72°F to 88°F and is rarely below 70°F or above 90°F.

Based on the tourism score, the best time of year to visit Honiara-Henderson International Airport for warm-weather activities is from late May to early October.

Climate Summary

hotJanFebMarAprMayJunJulAugSepOctNovDecNowNow29%29%10%10%overcastprecipitation: 9.9 inprecipitation: 9.9 in2.7 in2.7 inmuggy: 100%muggy: 100%99%99%tourism score: 6.0tourism score: 6.04.04.0
Click on each chart for more information.

Temperature

The temperature at Honiara-Henderson International Airport varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

Average High and Low Temperature

Average High and Low Temperature at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°FAug 1786°FAug 1786°FNov 3088°FNov 3088°F72°F72°F74°F74°FOct 2487°FOct 2487°FJan 1787°FJan 1787°FJun 2587°FJun 2587°F73°F73°F75°F75°F73°F73°FLowHighNowNow
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 at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMNowNowcomfortablewarmwarmhot
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.

Quevedo, Ecuador (8,288 miles away); Padang, Indonesia (4,149 miles); and Yogyakarta, Indonesia (3,397 miles) are the far-away foreign places with temperatures most similar to Honiara-Henderson International Airport (view comparison).

Clouds

At Honiara-Henderson International Airport, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.

The clearer part of the year at Honiara-Henderson International Airport begins around June 20 and lasts for 3.5 months, ending around October 5. On August 21, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 29% of the time, and overcast or mostly cloudy 71% of the time.

The cloudier part of the year begins around October 5 and lasts for 8.5 months, ending around June 20. On February 9, the cloudiest day of the year, the sky is overcast or mostly cloudy 90% of the time, and clear, mostly clear, or partly cloudy 10% of the time.

Cloud Cover Categories

Cloud Cover Categories at Honiara-Henderson International AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2129%Aug 2129%Feb 910%Feb 910%Jun 2019%Jun 2019%Oct 520%Oct 520%NowNowpartly cloudymostly cloudyovercastmostly clearclear
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.

Precipitation

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

The wetter season lasts 3.6 months, from December 13 to April 2, with a greater than 34% chance of a given day being a wet day. The chance of a wet day peaks at 47% on February 15.

The drier season lasts 8.4 months, from April 2 to December 13. The smallest chance of a wet day is 21% on July 22.

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 47% on February 15.

Daily Chance of Precipitation

Daily Chance of Precipitation at Honiara-Henderson International AirportwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 1547%Feb 1547%Jul 2221%Jul 2221%Dec 1334%Dec 1334%Apr 234%Apr 234%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 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. Honiara-Henderson International Airport experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year at Honiara-Henderson International Airport. The most rain falls during the 31 days centered around February 21, with an average total accumulation of 9.9 inches.

The least rain falls around September 2, with an average total accumulation of 2.7 inches.

Average Monthly Rainfall

Average Monthly Rainfall at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in5 in10 in15 in20 inFeb 219.9 inFeb 219.9 inSep 22.7 inSep 22.7 inNowNow
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 at Honiara-Henderson International Airport does not vary substantially over the course of the year, staying within 40 minutes of 12 hours throughout. In 2020, the shortest day is June 21, with 11 hours, 34 minutes of daylight; the longest day is December 21, with 12 hours, 41 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2312 hr, 6 minSep 2312 hr, 41 minDec 2112 hr, 41 minDec 2112 hr, 7 minMar 2012 hr, 7 minMar 2011 hr, 34 minJun 2111 hr, 34 minJun 21daydaynightNowNow
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 5:47 AM on November 16, and the latest sunrise is 49 minutes later at 6:37 AM on July 14. The earliest sunset is at 6:05 PM on May 27, and the latest sunset is 43 minutes later at 6:48 PM on January 28.

Daylight saving time (DST) is not observed at Honiara-Henderson International Airport during 2020.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNov 165:47 AMNov 165:47 AM6:48 PMJan 286:48 PMJan 28May 276:05 PMMay 276:05 PM6:37 AMJul 146:37 AMJul 14daySolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2020. 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.

The perceived humidity level at Honiara-Henderson International Airport, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 100% throughout.

Humidity Comfort Levels

Humidity Comfort Levels at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Aug 1799%Aug 1799%100%Apr 16100%Apr 16NowNowmiserablemiserableoppressiveoppressivemuggymuggy
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.

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 at Honiara-Henderson International Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.5 months, from June 1 to October 16, with average wind speeds of more than 10.5 miles per hour. The windiest day of the year is August 23, with an average hourly wind speed of 13.6 miles per hour.

The calmer time of year lasts for 7.5 months, from October 16 to June 1. The calmest day of the year is December 9, with an average hourly wind speed of 7.4 miles per hour.

Average Wind Speed

Average Wind Speed at Honiara-Henderson International AirportwindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mphAug 2313.6 mphAug 2313.6 mphDec 97.4 mphDec 97.4 mphJun 110.5 mphJun 110.5 mphOct 1610.5 mphOct 1610.5 mphNowNow
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 at Honiara-Henderson International Airport varies throughout the year.

The wind is most often from the east for 9.3 months, from March 17 to December 26, with a peak percentage of 80% on September 17. The wind is most often from the west for 2.7 months, from December 26 to March 17, with a peak percentage of 31% on January 1.

Wind Direction

Wind Direction at Honiara-Henderson International AirportWEJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
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).

Water Temperature

Honiara-Henderson International Airport 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 does not vary significantly over the course of the year, remaining within 1°F of 84°F throughout.

Average Water Temperature

Average Water Temperature at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec80°F81°F82°F83°F84°F85°F86°F87°F88°FJan 486°FJan 486°F83°FAug 2483°FAug 24Dec 585°FDec 585°FFeb 2985°FFeb 2985°FJul 1183°FJul 1183°FSep 2883°FSep 2883°FNowNow
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 at Honiara-Henderson International Airport 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 Honiara-Henderson International Airport for general outdoor tourist activities is from late May to early October, with a peak score in the third week of August.

Tourism Score

Tourism Score at Honiara-Henderson International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.06.04.04.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Honiara-Henderson International Airport for hot-weather activities is from mid April to mid November, with a peak score in the last week of August.

Beach/Pool Score

Beach/Pool Score at Honiara-Henderson International Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468105.95.94.44.4NowNow 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 at Honiara-Henderson International Airport 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 at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec0%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 2100%Jul 2NowNowcomfortablewarmhot
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.

Growing Degree Days

Growing Degree Days at Honiara-Henderson International AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F2,000°F4,000°F6,000°F8,000°F10,000°FJul 490°FJul 490°FSep 21,800°FSep 21,800°FJun 3010,742°FJun 3010,742°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 some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.7 months, from August 30 to November 22, with an average daily incident shortwave energy per square meter above 5.1 kWh. The brightest day of the year is October 20, with an average of 5.3 kWh.

The darker period of the year lasts for 2.5 months, from April 28 to July 12, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest day of the year is May 24, with an average of 3.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Honiara-Henderson International AirportbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWhOct 205.3 kWhOct 205.3 kWhMay 243.9 kWhMay 243.9 kWhAug 305.1 kWhAug 305.1 kWhJul 124.2 kWhJul 124.2 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.

Topography

For the purposes of this report, the geographical coordinates of Honiara-Henderson International Airport are -9.428 deg latitude, 160.055 deg longitude, and 20 ft elevation.

The topography within 2 miles of Honiara-Henderson International Airport contains only modest variations in elevation, with a maximum elevation change of 154 feet and an average elevation above sea level of 23 feet. Within 10 miles contains only modest variations in elevation (3,310 feet). Within 50 miles also contains extreme variations in elevation (7,638 feet).

The area within 2 miles of Honiara-Henderson International Airport is covered by water (38%), trees (28%), and cropland (22%), within 10 miles by water (52%) and trees (29%), and within 50 miles by water (75%) and trees (20%).

Data Sources

This report illustrates the typical weather at Honiara-Henderson International Airport, 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

Honiara-Henderson International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

There are no other weather stations in our network within 200 kilometers of this location. Consequently, in the case of missing or erroneous measurements from this station, we fall back on NASA's MERRA-2 modern-era reanalysis , adjusted according to typical seasonal and diurnal differences between this station and the wide-area MERRA-2 reconstructed values.

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 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.