December Weather in Atuona French Polynesia

Daily high temperatures are around 79°F, rarely falling below 77°F or exceeding 81°F.

Daily low temperatures are around 78°F, rarely falling below 76°F or exceeding 80°F.

For reference, on April 7, the hottest day of the year, temperatures in Atuona typically range from 79°F to 80°F, while on September 10, the coldest day of the year, they range from 76°F to 78°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Soufrière, St. Lucia (5,595 miles away) and Malibago, Philippines (6,975 miles) are the far-away foreign places with temperatures most similar to Atuona (view comparison).

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The month of December in Atuona experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 48% throughout the month. The highest chance of overcast or mostly cloudy conditions is 49% on December 12.

The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 53% of the time.

For reference, on March 31, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 62%, while on August 9, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Atuona, the chance of a wet day over the course of December is gradually decreasing, starting the month at 12% and ending it at 9%.

For reference, the year's highest daily chance of a wet day is 25% on April 1, and its lowest chance is 2% on September 17.

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during December in Atuona is gradually increasing, starting the month at 0.8 inches, when it rarely exceeds 2.8 inches or falls below -0.0 inches, and ending the month at 1.2 inches, when it rarely exceeds 3.6 inches or falls below -0.0 inches.

Over the course of December in Atuona, the length of the day is essentially constant. The shortest day of the month is December 1, with 12 hours, 39 minutes of daylight and the longest day is December 20, with 12 hours, 42 minutes of daylight.

The earliest sunrise of the month in Atuona is 5:15 AM on December 1 and the latest sunrise is 13 minutes later at 5:28 AM on December 31.

The earliest sunset is 5:55 PM on December 1 and the latest sunset is 15 minutes later at 6:10 PM on December 31.

Daylight saving time is not observed in Atuona during 2025.

For reference, on December 21, the longest day of the year, the Sun rises at 5:23 AM and sets 12 hours, 42 minutes later, at 6:05 PM, while on June 21, the shortest day of the year, it rises at 6:01 AM and sets 11 hours, 33 minutes later, at 5:34 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for December 2025. 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 chance that a given day will be muggy in Atuona is essentially constant during December, remaining around 100% throughout.

For reference, on January 24, the muggiest day of the year, there are muggy conditions 100% of the time, while on August 18, the least muggy day of the year, there are muggy conditions 98% of the time.

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 Atuona is gradually increasing during December, increasing from 13.0 miles per hour to 13.6 miles per hour over the course of the month.

For reference, on July 24, the windiest day of the year, the daily average wind speed is 15.2 miles per hour, while on March 27, the calmest day of the year, the daily average wind speed is 12.2 miles per hour.

The hourly average wind direction in Atuona throughout December is predominantly from the east, with a peak proportion of 90% on December 21.

Atuona 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 surface water temperature in Atuona is essentially constant during December, remaining around 82°F throughout.

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 Atuona 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.

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.

The average accumulated growing degree days in Atuona are rapidly increasing during December, increasing by 850°F, from 4,194°F to 5,044°F, over the course of the month.

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 in Atuona is essentially constant during December, remaining within 0.1 kWh of 7.2 kWh throughout.

For the purposes of this report, the geographical coordinates of Atuona are -9.803 deg latitude, -139.042 deg longitude, and 52 ft elevation.

The topography within 2 miles of Atuona contains extreme variations in elevation, with a maximum elevation change of 4,058 feet and an average elevation above sea level of 592 feet. Within 10 miles also contains extreme variations in elevation (4,259 feet). Within 50 miles also contains extreme variations in elevation (4,324 feet).

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