Climate and monthly weather forecast
Koumac, New Caledonia

englishespañol中文
Share

The climate of Koumac

Straddling the Tropic of Capricorn, Koumac in New Caledonia enjoys a Tropical wet and dry or savanna climate, classified as type As under the Köppen climate classification. A yearly cycle in Koumac consists of a wet season and a dry season with significant temperature and humidity variations.

Throughout the year, the temperature oscillates from a low of 18.9°C (66°F) in August to a high of 28.3°C (82.9°F) in February, indicating a fairly warm climate with minimal cold extremes. The humidity levels show relatively less fluctuation, with the lowest value noted at 74% from September to November and the maximum at 79% in March.

The precipitation pattern reveals an interesting aspect of Koumac’s weather - the wet-dry cycle. Rainfall is notably higher from January to April, peaking at 146mm (5.75") in February, while the driest period comes between July and September, with the minimum rainfall observed in September at just 15mm (0.59").

Furthermore, the town witnesses cloud coverage between 28% to 42% during the course of the year, the highest in March and December, and the lowest from August through October. Wind speeds average between 13.3km/h (8.3mph) to 15.4km/h (9.6mph), with the highest gust speed of 21.7km/h (13.5mph) recorded in June.

The best time to visit Koumac

With humidity at its lowest and temperatures in a comfortable range between 22.8°C (73°F) to 23.6°C (74.5°F), September paves the way for an ideal time for a visit. September also sees the least amount of rainfall at just 15mm (0.59"), ensuring outdoor activities are less likely to be disrupted by sudden showers. Additionally, with the number of sunshine days reaching 18.3, visitors in September will enjoy long, sunlit days.

The worst time to visit Koumac

Visitors may want to refrain from planning visits during February and March, marked by the highest rainfall, with February showing a significant 146mm (5.75") rainfall. The higher temperatures during these months, going up to 28.3°C (82.9°F) in February and combined with maximum humidity levels of 79% in March, may result in an oppressive, uncomfortable climate.

Spring weather in Koumac

As Koumac transitions from the wet period into the drier months, the spring season, fanning out from September to November, exhibits gradually intensive warmth. September sees temperatures averaging from 19.5°C (67.1°F) to 23.6°C (74.5°F), gradually rising to a high of 26.1°C (79°F) and a low of 22.1°C (71.8°F) in November. Coupled with reduced rainfall, and increased daylight, reaching 13.1 hours by November, the spring season in Koumac hosts ideal weather conditions for outdoor excursions.

Summer weather in Koumac

Summer in Koumac, running from December through February, greets visitors with its hottest temperatures, ranging from 23.7°C (74.7°F) to 28.3°C (82.9°F). However, along with soaring temperatures, this time of the year brings the highest rainfall, peaking at 146mm (5.75") in February, and diminished daylight hours, bottoming out at 12.2 hours in February. Hence, despite the longer sunshine hours, the weather can be unpredictable, making it necessary for travelers to be prepared for sudden showers.

Autumn weather in Koumac

The autumn months in Koumac, extending from March to May, offer a more moderate climate, with temperatures going from a low of 21.6°C (70.9°F) to a high of 28°C (82.4°F) in March, then gradually cooling to a range of 20.4°C (68.7°F) to 26.7°C (80.1°F) by May. While the rainfall from March to May declines from 114mm (4.49") to 38mm (1.5"), the number of daylight hours rise during this period, making autumn a suitable time for sightseeing and enjoying the local outdoors.

Winter weather in Koumac

Koumac’s winter spanning from June to August presents its most temperate weather with temperatures hanging between 18.9°C (66°F) to 23.6°C (74.5°F). The rainfall during these months is the lowest, with July and August receiving just 27mm (1.06") and 24mm (0.94") respectively. Despite lower temperatures, the number of sunshine days from June to August hovers between 16.3 to 19.7 days, shedding ample light for visitors to explore the town and its surrounding areas.

Weather in January

January in Koumac, New Caledonia, presents the ambient conditions of the tropical climate with increased humidity caused by the consistent rainfall in the earlier period of the year. The tropical weather is at its peak with the temperature ranging from 24.4°C (75.9°F) to 27.8°C (82°F) and a higher rate of rainfall reaching 103mm (4.06"). Weather in January »

Weather in February

Koumac experiences a progressive weather transition in February, even though the tropical climate is notably persisting. The rain is slightly more significant than the previous month, measuring up to 146mm (5.75") of precipitation. Weather in February »

Weather in March

Following February, March weather in Koumac adjusts subtly, marking the subtle transition to a drier season. The rainfall level decreases to 114mm (4.49"), a notable drop in comparison to the previous month. This month witnesses a slight decline in temperature, fostering a more comfortable and less muggy environment. Weather in March »

Weather in April

With April arrives an appreciable drop in the rainfall amounting to 64mm (2.52"), almost half of the preceding month, ushering in the dry season in Koumac. The temperature records a slight dip with the lowest temperature noted at 23.2°C (73.8°F), contributing to the ever-evolving weather dynamics of the town. Weather in April »

Weather in May

Come May, the weather in Koumac experiences further dryness, a climatic hallmark of this period of the year. A significant reduction in rainfall to 44mm (1.73") characterizes the month, and the general weather pattern turns drier than the previous month. Weather in May »

Weather in June

June in Koumac reveals a fascinating blend of weather elements, unveiling one of the most charming periods of the year. June sees the lowest temperature of the year, with the mercury dipping to 20.4°C (68.7°F), indicating a refreshing cool climate. Weather in June »

Weather in July

As Koumac moves into July, the weather takes a turn towards a blend of tropical and temperate features. The reduced rainfall measures up to 27mm (1.06"), characterizing a typical dry season. The temperature exhibits stability with minimal variation, creating a more predictable weather phenomenon. Weather in July »

Weather in August

August is another month of weather stability in Koumac, New Caledonia. Following a similar pattern to July, the rainfall quantity further drops to 24mm (0.94"), underpinning the continuance of the dry period. The cloudiness decreases, resulting in longer hours of daylight and increased visibility. Weather in August »

Weather in September

The weather in September manifests a gradual transition from dry to slightly wet conditions in Koumac. A minimal rainfall increase is noted, marking at 15mm (0.59"), indicating the beginning of a slightly wetter period compared to the preceding months. Weather in September »

Weather in October

October in Koumac signals a shift towards a wetter weather pattern, indicated by the increased rainfall. Doubling the previous month's rainfall, the city records 33mm (1.3") of precipitation. Additionally, the temperatures tend to rise gradually, providing a slight warmness in the general weather conditions. Weather in October »

Weather in November

With the arrival of November, Koumac experiences a renewed period of rainfall with a substantial leap to 45mm (1.77"), a visible upturn from the preceding month. The weather is characterized by increased cloudiness leading to lesser daylight hours. Weather in November »

Weather in December

A bustling December in Koumac, New Caledonia, brings with it an amplified version of November's weather traits. December experiences enhanced rainfall, with a notable jump to 80mm (3.15") of precipitation compared to November. Weather in December »

Frequently asked questions

How many days does it rain in Koumac?

Throughout the year, in Koumac, New Caledonia, there are 190.5 rainfall days, and 733mm (28.86") of precipitation is accumulated.

When is the highest UV index in Koumac?

January through March, with an average maximum UV index of 7, are months with the highest UV index in Koumac.

What month is the hottest in Koumac?

In Koumac, the average temperatures in February are the highest, with a peak at 28.3°C (82.9°F) and a low of 24.8°C (76.6°F).

What is the wettest month in Koumac?

February is the month with the most rainfall in Koumac. Rain falls for 21.8 days and accumulates 146mm (5.75") of precipitation.

What is the most humid month in Koumac?

The most humid month is March, with an average relative humidity of 79%.

What is the month with the lowest UV index in Koumac?

April through December, with an average maximum UV index of 6, are months with the lowest UV index in Koumac, New Caledonia.

What is the month with the shortest days in Koumac?

June has the shortest days of the year, with an average of 10h and 54min of daylight.

What are the coldest months in Koumac?

July and August are identified as the coldest months in Koumac, with an average high-temperature of 22.8°C (73°F).

What is the month with the least sunshine in Koumac?

The month with the least sunshine in Koumac, New Caledonia, is August, with an average of 6.1h of sunshine.

What is the least humid month in Koumac?

September through November, with an average relative humidity of 74%, are the least humid months.

What is the driest month in Koumac?

The month with the least rainfall is September, when the rain falls for 8.2 days and typically collects 15mm (0.59") of precipitation.

What month has the most sunshine in Koumac?

The month with the most sunshine in Koumac is October, with an average of 10.1h of sunshine.

When are the longest days in Koumac?

With an average of 13h and 24min of daylight, December has the longest days of the year in Koumac, New Caledonia.

Is there Daylight Saving Time (DST) in Koumac?

Koumac, New Caledonia, does not utilize Daylight Saving Time (DST). +11 timezone is used over the entire year.

Average temperature
Koumac, New Caledonia

Average temperature - Koumac, New Caledonia

The warmest month (with the highest average high temperature) is February (28.3°C).
The months with the lowest average high temperature are July and August (22.8°C).

The month with the highest average low temperature is February (24.8°C).
The coldest month (with the lowest average low temperature) is August (18.9°C).

Average pressure
Koumac, New Caledonia

Average pressure - Koumac, New Caledonia

The month with the highest atmospheric pressure is August (1016.4mbar).
The month with the lowest atmospheric pressure is February (1007.6mbar).

Average wind speed
Koumac, New Caledonia

Average wind speed - Koumac, New Caledonia

The windiest month (with the highest average wind speed) is June (15.4km/h).
The calmest month (with the lowest average wind speed) is December (13.3km/h).

Average humidity
Koumac, New Caledonia

Average humidity - Koumac, New Caledonia

The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are September, October and November (74%).

Average rainfall
Koumac, New Caledonia

Average rainfall - Koumac, New Caledonia

The wettest month (with the highest rainfall) is February (146mm).
The driest month (with the least rainfall) is September (15mm).

Average rainfall days
Koumac, New Caledonia

Average rainfall days - Koumac, New Caledonia

The month with the highest number of rainy days is March (24.8 days).
The months with the least rainy days are August and September (8.2 days).

Average daylight / Average sunshine
Koumac, New Caledonia

Average daylight / Average sunshine - Koumac, New Caledonia

The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).

The month with the most sunshine is October (Average sunshine: 10h and 6min).
The month with the least sunshine is August (Average sunshine: 6h and 6min).

Average sunshine days
Koumac, New Caledonia

Average sunshine days - Koumac, New Caledonia

The month with the most sunshine days is July (19.7 days).
The month with the least sunshine days is March (2.5 days).

Average UV index
Koumac, New Caledonia

Average UV index - Koumac, New Caledonia

The months with the highest UV index are January, February and March (UV index 7).
The months with the lowest UV index are April, May, June, July, August, September, October, November and December (UV index 6).

Average visibility
Koumac, New Caledonia

Average visibility - Koumac, New Caledonia

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

Koumac, New Caledonia

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location