This report describes the typical weather at the Fua'Amotu International Airport (Fua'amotu, Tonga) weather station over the course of an average year. It is based on the historical records from 1998 to 2012. Earlier records are either unavailable or unreliable.
Fua'amotu has a tropical rainforest climate with no dry season. The area within 25 mi of this station is covered by oceans and seas (100%).
Over the course of a year, the temperature typically varies from 66°F to 85°F and is rarely below 61°F or above 87°F.
The warm season lasts from December 17 to April 11 with an average daily high temperature above 83°F. The hottest day of the year is February 19, with an average high of 85°F and low of 75°F.
The cold season lasts from June 18 to October 6 with an average daily high temperature below 78°F. The coldest day of the year is August 17, with an average low of 66°F and high of 76°F.
The length of the day varies significantly over the course of the year. The shortest day is June 20 with 10:50 hours of daylight; the longest day is December 21 with 13:26 hours of daylight.
The earliest sunrise is at 5:49am on November 28 and the latest sunset is at 7:28pm on January 14. The latest sunrise is at 7:19am on July 5 and the earliest sunset is at 6:06pm on June 5.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 72% (partly cloudy) and does not vary substantially over the course of the year.
On July 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 45% of the time, and overcast or mostly cloudy 39% of the time.
On November 25, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 66% of the time, and clear or mostly clear 18% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around March 23, occurring in 59% of days. Precipitation is least likely around November 12, occurring in 41% of days.
Over the entire year, the most common forms of precipitation are moderate rain and light rain.
Moderate rain is the most severe precipitation observed during 48% of those days with precipitation. It is most likely around February 8, when it is observed during 30% of all days.
Light rain is the most severe precipitation observed during 40% of those days with precipitation. It is most likely around September 11, when it is observed during 23% of all days.
During the warm season, which lasts from December 17 to April 11, there is a 55% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (51% of days with precipitation have at worst moderate rain), light rain (36%), and thunderstorms (8%).
During the cold season, which lasts from June 18 to October 6, there is a 47% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of moderate rain (47% of days with precipitation have at worst moderate rain) and light rain (44%).
Either snow is exceptionally unlikely to fall at any time during the year at this location or this station does not reliably report precipitation types.
The relative humidity typically ranges from 65% (mildly humid) to 96% (very humid) over the course of the year, rarely dropping below 52% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around July 7, at which time the relative humidity drops below 73% (humid) three days out of four; it is most humid around March 12, exceeding 94% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 60°F (comfortable) to 77°F (oppressive) and is rarely below 53°F (very comfortable) or above 79°F (oppressive).
Over the course of the year typical wind speeds vary from 1 mph to 14 mph (light air to moderate breeze), rarely exceeding 21 mph (fresh breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around September 24, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around March 10, at which time the average daily maximum wind speed is 12 mph (moderate breeze).