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Climate and Average Weather Year Round in Solomon Islands Solomon Islands

The climate in Solomon Islands 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 Solomon Islands for warm-weather activities is from late May to early October.

Climate in Solomon Islands

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
Solomon Islands weather by month. Click on each chart for more information.

The temperature in Solomon Islands varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.

Average High and Low Temperature in Solomon Islands

Average High and Low Temperature in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FAug 1886°FAug 1886°FDec 188°FDec 188°F72°F72°F74°F74°FOct 2587°FOct 2587°FJan 1787°FJan 1787°FJun 2687°FJun 2687°F73°F73°F75°F75°F73°F73°FNowNow
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.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High87°F87°F87°F87°F87°F87°F86°F86°F87°F87°F87°F88°F
Temp.81°F80°F80°F80°F80°F79°F79°F79°F79°F80°F80°F81°F
Low75°F75°F75°F74°F74°F73°F73°F73°F73°F73°F74°F75°F

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 Solomon Islands

Average Hourly Temperature in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec12 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 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.
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© Esri, et al.

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In Solomon Islands, 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 in Solomon Islands begins around June 21 and lasts for 3.5 months, ending around October 6.

The clearest month of the year in Solomon Islands is August, during which on average the sky is clear, mostly clear, or partly cloudy 27% of the time.

The cloudier part of the year begins around October 6 and lasts for 8.5 months, ending around June 21.

The cloudiest month of the year in Solomon Islands is February, during which on average the sky is overcast or mostly cloudy 90% of the time.

Cloud Cover Categories in Solomon Islands

Cloud Cover Categories in Solomon IslandsclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2229%Aug 2229%Feb 910%Feb 910%Jun 2119%Jun 2119%Oct 620%Oct 620%NowNowpartly cloudymostly cloudyovercastmostly clear
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.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier88%90%87%84%83%81%78%73%77%82%84%87%
Clearer12%10%13%16%17%19%22%27%23%18%16%13%

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

The wetter season lasts 3.6 months, from December 14 to April 3, with a greater than 34% chance of a given day being a wet day. The month with the most wet days in Solomon Islands is February, with an average of 12.7 days with at least 0.04 inches of precipitation.

The drier season lasts 8.4 months, from April 3 to December 14. The month with the fewest wet days in Solomon Islands is July, with an average of 6.9 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Solomon Islands is February, with an average of 12.7 days. 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 in Solomon Islands

Daily Chance of Precipitation in Solomon IslandswetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 1547%Feb 1547%Jul 2321%Jul 2321%Jan 139%Jan 139%Apr 334%Apr 334%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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain12.5d12.7d12.7d9.4d8.7d7.1d6.9d7.3d7.0d7.9d8.5d10.8d

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. Solomon Islands experiences extreme seasonal variation in monthly rainfall.

Rain falls throughout the year in Solomon Islands. The month with the most rain in Solomon Islands is February, with an average rainfall of 9.7 inches.

The month with the least rain in Solomon Islands is August, with an average rainfall of 2.7 inches.

Average Monthly Rainfall in Solomon Islands

Average Monthly Rainfall in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in5 in5 in10 in10 in15 in15 in20 in20 inFeb 219.9 inFeb 219.9 inSep 32.7 inSep 32.7 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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall7.8″9.7″8.4″5.7″4.1″3.2″2.9″2.7″2.7″3.8″4.4″6.3″

The length of the day in Solomon Islands does not vary substantially over the course of the year, staying within 35 minutes of 12 hours throughout. In 2021, the shortest day is June 21, with 11 hours, 40 minutes of daylight; the longest day is December 22, with 12 hours, 36 minutes of daylight.

Hours of Daylight and Twilight in Solomon Islands

Hours of Daylight and Twilight in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minSep 2312 hr, 6 minSep 2312 hr, 36 minDec 2212 hr, 36 minDec 2212 hr, 7 minMar 2012 hr, 7 minMar 2011 hr, 40 minJun 2111 hr, 40 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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight12.5h12.4h12.1h11.9h11.7h11.7h11.7h11.9h12.1h12.3h12.5h12.6h

The earliest sunrise is at 5:54 AM on November 15, and the latest sunrise is 45 minutes later at 6:39 AM on July 15. The earliest sunset is at 6:12 PM on May 25, and the latest sunset is 39 minutes later at 6:51 PM on January 29.

Daylight saving time (DST) is not observed in Solomon Islands during 2021.

Sunrise & Sunset with Twilight in Solomon Islands

Sunrise & Sunset with Twilight in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNov 155:54 AMNov 155:54 AM6:51 PMJan 296:51 PMJan 29May 256:12 PMMay 256:12 PM6:39 AMJul 156:39 AMJul 15daynightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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 key lunar data for 2021. 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.

Moon Rise, Set & Phases in Solomon Islands

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.

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 in Solomon Islands, 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 in Solomon Islands

Humidity Comfort Levels in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Aug 1899%Aug 1899%100%Apr 17100%Apr 17NowNowmiserablemiserableoppressiveoppressivemuggymuggy
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.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days31.0d28.0d31.0d30.0d31.0d30.0d30.9d30.9d29.9d30.9d30.0d31.0d

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 Solomon Islands experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 4.5 months, from June 2 to October 17, with average wind speeds of more than 10.5 miles per hour. The windiest month of the year in Solomon Islands is August, with an average hourly wind speed of 13.5 miles per hour.

The calmer time of year lasts for 7.5 months, from October 17 to June 2. The calmest month of the year in Solomon Islands is December, with an average hourly wind speed of 7.6 miles per hour.

Average Wind Speed in Solomon Islands

Average Wind Speed in Solomon IslandswindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mphAug 2413.6 mphAug 2413.6 mphDec 107.4 mphDec 107.4 mphJun 210.5 mphJun 210.5 mphOct 1710.5 mphOct 1710.5 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph)8.29.08.67.99.411.513.213.512.310.48.37.6

The predominant average hourly wind direction in Solomon Islands varies throughout the year.

The wind is most often from the east for 9.3 months, from March 18 to December 27, with a peak percentage of 80% on September 18. The wind is most often from the west for 2.7 months, from December 27 to March 18, with a peak percentage of 31% on January 1.

Wind Direction in Solomon Islands

Wind Direction in Solomon IslandsWEJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Solomon Islands 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 in Solomon Islands

Average Water Temperature in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°F86°F86°F87°F87°F88°F88°FJan 486°FJan 486°F83°FAug 2583°FAug 25Dec 685°FDec 685°FMar 185°FMar 185°FJul 1283°FJul 1283°FSep 2983°FSep 2983°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature86°F85°F85°F85°F84°F84°F83°F83°F83°F84°F84°F85°F

To characterize how pleasant the weather is in Solomon Islands 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 Solomon Islands for general outdoor tourist activities is from late May to early October, with a peak score in the third week of August.

Tourism Score in Solomon Islands

Tourism Score in Solomon Islandsbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.06.04.04.0NowNowcloudscloudstemperaturetemperature tourism 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 Solomon Islands for hot-weather activities is from mid April to mid November, with a peak score in the last week of August.

Beach/Pool Score in Solomon Islands

Beach/Pool Score in Solomon Islandsbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.95.94.44.4NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/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.

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 Solomon Islands 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 Solomon Islands

Time Spent in Various Temperature Bands and the Growing Season in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec0%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 3NowNowcomfortablewarmhot
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 in Solomon Islands

Growing Degree Days in Solomon IslandsJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FJul 490°FJul 490°FSep 21,800°FSep 21,800°FJun 3010,742°FJun 3010,742°FNowNow
The average growing degree days accumulated over the course of the year, 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 experiences some seasonal variation over the course of the year.

The brighter period of the year lasts for 2.8 months, from August 31 to November 23, with an average daily incident shortwave energy per square meter above 5.1 kWh. The brightest month of the year in Solomon Islands is October, with an average of 5.3 kWh.

The darker period of the year lasts for 2.5 months, from April 29 to July 13, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest month of the year in Solomon Islands is June, with an average of 4.0 kWh.

Average Daily Incident Shortwave Solar Energy in Solomon Islands

Average Daily Incident Shortwave Solar Energy in Solomon IslandsbrightdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhOct 215.3 kWhOct 215.3 kWhMay 253.9 kWhMay 253.9 kWhAug 315.1 kWhAug 315.1 kWhJul 134.2 kWhJul 134.2 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh)4.64.54.54.44.04.04.34.95.25.35.14.9

For the purposes of this report, the geographical coordinates of Solomon Islands are -8.000 deg latitude, 159.000 deg longitude, and 0 ft elevation.

The topography within 2 miles of Solomon Islands is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).

The area within 2 miles of Solomon Islands is covered by trees (76%) and grassland (13%), within 10 miles by trees (51%) and water (33%), and within 50 miles by water (84%) and trees (12%).

This report illustrates the typical weather in Solomon Islands, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used for this report can be found on the Honiara-Henderson International Airport page.

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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