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Average Weather in Funafuti Tuvalu

In Funafuti, the temperature typically varies from 80°F to 88°F over the course of the year, and is rarely below 77°F or above 90°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, 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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecwarmwarmhothot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 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.

Sun

The length of the day in Funafuti does not vary substantially over the course of the year, staying within 37 minutes of 12 hours throughout. In 2017, the shortest day is June 21, with 11 hours, 38 minutes of daylight; the longest day is December 21, with 12 hours, 37 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 5:32 AM on November 17, and the latest sunrise is 46 minutes later at 6:19 AM on July 15. The earliest sunset is at 5:50 PM on May 26, and the latest sunset is 40 minutes later at 6:30 PM on January 28.

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

Sunrise & Sunset with Twilight

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.

Clouds

In Funafuti, 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 Funafuti begins around June 9 and lasts for 4.3 months, ending around October 17. On September 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 40% of the time, and overcast or mostly cloudy 60% of the time.

The cloudier part of the year begins around October 17 and lasts for 7.7 months, ending around June 9. On December 19, the cloudiest day of the year, the sky is overcast or mostly cloudy 87% of the time, and clear, mostly clear, or partly cloudy 13% of the time.

Cloud Cover

clearerclearercloudiercloudiercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 1987%Dec 1987%Sep 260%Sep 260%Jun 973%Jun 973%Oct 1773%Oct 1773%overcastovercastmostly cloudymostly cloudymostly clearmostly clearclearclear
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 Funafuti varies throughout the year.

The wetter season lasts 5.8 months, from October 11 to April 6, with a greater than 53% chance of a given day being a wet day. The chance of a wet day peaks at 66% on February 3.

The drier season lasts 6.2 months, from April 6 to October 11. The smallest chance of a wet day is 40% on April 23.

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 66% on February 3.

Daily Chance of Precipitation

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 in the year. Funafuti experiences very significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Funafuti. The most rain falls during the 31 days centered around January 26, with an average total accumulation of 12.0 inches.

The least rain falls around September 4, with and average total accumulation of 4.6 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.

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 in Funafuti, 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

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJul 3100%Jul 3100%miserablemiserablemuggymuggy
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 Funafuti experiences mildly seasonal variation over the course of the year.

The windier part of the year lasts for 4.1 months, from May 31 to October 2, with average wind speeds of more than 6.3 miles per hour. The windiest day of the year is July 20, with an average hourly wind speed of 7.5 miles per hour.

The calmer time of year lasts for 7.9 months, from October 2 to May 31. The calmest day of the year is November 20, with an average hourly wind speed of 5.1 miles per hour.

Average Wind Speed

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 Funafuti varies throughout the year.

The wind is most often from the north for 2.6 weeks, from January 1 to January 19, with a peak percentage of 35% on January 6. The wind is most often from the east for 11 months, from January 19 to January 1, with a peak percentage of 91% on July 21.

Wind Direction

NNEE0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestwestsouthsoutheasteastnorthnorth
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

Funafuti 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 85°F throughout.

Average Water Temperature

The daily average water temperature (purple line) with percentile bands, 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 2.1 months, from August 22 to October 24, with an average daily incident shortwave energy per square meter above 5.4 kWh. The brightest day of the year is September 18, with an average of 5.8 kWh.

The darker period of the year lasts for 1.9 months, from April 28 to June 26, with an average daily incident shortwave energy per square meter below 4.5 kWh. The darkest day of the year is May 26, with an average of 4.1 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 Funafuti are -8.524 deg latitude, 179.194 deg longitude, and 0 ft elevation.

The topography within 2 miles of Funafuti is essentially flat, with a maximum elevation change of 36 feet, and an average elevation above sea level of 1 foot. Within 10 miles is also essentially flat (62 feet). Within 50 miles is also essentially flat (66 feet).

The area within 2 miles of Funafuti is covered by water (100%), within 10 miles by water (100%), and within 50 miles by water (100%).

Data Sources

This report illustrates the typical weather in Funafuti, 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 is only a single weather station, Funafuti International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Funafuti.

At a distance of 3 kilometers from Funafuti, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Funafuti according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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 .