Climate and Average Weather Year Round in Dumbéa New Caledonia

In Dumbéa, the summers are warm, oppressive, wet, and partly cloudy; the winters are comfortable and mostly clear; and it is windy year round. Over the course of the year, the temperature typically varies from 62°F to 85°F and is rarely below 58°F or above 89°F.

Based on the tourism score, the best times of year to visit Dumbéa for warm-weather activities are from late April to early May and from early July to mid December.

The warm season lasts for 3.5 months, from December 11 to March 25, with an average daily high temperature above 83°F. The hottest month of the year in Dumbéa is February, with an average high of 85°F and low of 75°F.

The cool season lasts for 3.0 months, from June 12 to September 13, with an average daily high temperature below 75°F. The coldest month of the year in Dumbéa is August, with an average low of 62°F and high of 73°F.

In Dumbéa, 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 Dumbéa begins around June 15 and lasts for 5.8 months, ending around December 8.

The clearest month of the year in Dumbéa is September, during which on average the sky is clear, mostly clear, or partly cloudy 78% of the time.

The cloudier part of the year begins around December 8 and lasts for 6.2 months, ending around June 15.

The cloudiest month of the year in Dumbéa is February, during which on average the sky is overcast or mostly cloudy 58% of the time.

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

The wetter season lasts 6.0 months, from December 21 to June 20, with a greater than 22% chance of a given day being a wet day. The month with the most wet days in Dumbéa is February, with an average of 10.0 days with at least 0.04 inches of precipitation.

The drier season lasts 6.0 months, from June 20 to December 21. The month with the fewest wet days in Dumbéa is October, with an average of 3.3 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 Dumbéa is February, with an average of 10.0 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 36% on February 28.

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. Dumbéa experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Dumbéa. The month with the most rain in Dumbéa is March, with an average rainfall of 4.8 inches.

The month with the least rain in Dumbéa is September, with an average rainfall of 1.1 inches.

The length of the day in Dumbéa varies over the course of the year. In 2024, the shortest day is June 21, with 10 hours, 47 minutes of daylight; the longest day is December 21, with 13 hours, 30 minutes of daylight.

The earliest sunrise is at 5:01 AM on November 28, and the latest sunrise is 1 hour, 33 minutes later at 6:34 AM on July 4. The earliest sunset is at 5:17 PM on June 7, and the latest sunset is 1 hour, 26 minutes later at 6:43 PM on January 15.

Daylight saving time (DST) is not observed in Dumbéa during 2024.

The figure below presents a compact representation of key lunar data for 2024. 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.

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.

Dumbéa experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 8.1 months, from October 10 to June 13, during which time the comfort level is muggy, oppressive, or miserable at least 33% of the time. The month with the most muggy days in Dumbéa is March, with 29.4 days that are muggy or worse.

The month with the fewest muggy days in Dumbéa is August, with 4.0 days that are muggy or worse.

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 Dumbéa experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.5 months, from December 19 to June 4, with average wind speeds of more than 13.0 miles per hour. The windiest month of the year in Dumbéa is March, with an average hourly wind speed of 14.2 miles per hour.

The calmer time of year lasts for 6.5 months, from June 4 to December 19. The calmest month of the year in Dumbéa is September, with an average hourly wind speed of 12.0 miles per hour.

The predominant average hourly wind direction in Dumbéa is from the east throughout the year.

Dumbéa 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 experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.2 months, from January 2 to April 9, with an average temperature above 79°F. The month of the year in Dumbéa with the warmest water is February, with an average temperature of 81°F.

The time of year with cooler water lasts for 3.4 months, from June 30 to October 11, with an average temperature below 74°F. The month of the year in Dumbéa with the coolest water is August, with an average temperature of 73°F.

To characterize how pleasant the weather is in Dumbéa 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 times of year to visit Dumbéa for general outdoor tourist activities are from late April to early May and from early July to mid December, with a peak score in the last week of September.

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 Dumbéa for hot-weather activities is from early November to late April, with a peak score in the second week of December.

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 Dumbéa 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.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.9 months, from October 7 to February 3, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest month of the year in Dumbéa is December, with an average of 7.3 kWh.

The darker period of the year lasts for 2.9 months, from May 5 to August 2, with an average daily incident shortwave energy per square meter below 4.4 kWh. The darkest month of the year in Dumbéa is June, with an average of 3.6 kWh.

For the purposes of this report, the geographical coordinates of Dumbéa are -22.150 deg latitude, 166.450 deg longitude, and 36 ft elevation.

The topography within 2 miles of Dumbéa contains very significant variations in elevation, with a maximum elevation change of 869 feet and an average elevation above sea level of 143 feet. Within 10 miles contains very significant variations in elevation (4,469 feet). Within 50 miles also contains extreme variations in elevation (5,315 feet).

The area within 2 miles of Dumbéa is covered by trees (48%), shrubs (22%), and grassland (20%), within 10 miles by trees (51%) and water (31%), and within 50 miles by water (83%) and trees (13%).