September weather forecast
New Caledonia

September in New Caledonia marks the commencement of the spring season, with the weather gradually warming up. The influence of the Tropical Monsoon climate starts to strengthen during this month, leading to a rise in both temperature and humidity. Average temperatures increase to between 22°C (71.6°F) and 25°C (77°F), signaling a departure from the cooler winter months. Coastal cities such as Nouméa and Bourail see a similar rise in temperature, with the warmth accentuated by the increasing humidity levels.

Humidity in September starts to rise noticeably, marking a transition to the more humid conditions characteristic of the warmer months. Rainfall also sees an increase during this month, with precipitation levels ranging from 50mm (1.97") to 90mm (3.54"). Rain events become more frequent, typically occurring in the form of short showers during the afternoon or evening.

Compared to August, September experiences a significant increase in both temperature and rainfall, ushering in the spring season. Looking ahead to October, the warming and wetting trend continues, with temperatures and rainfall increasing as the Tropical Monsoon climate's influence further strengthens.

September's weather conditions favor a broad range of outdoor activities. The increasing temperatures and sea temperatures make water-based activities particularly enjoyable. Although rainfall is on the rise, showers are typically brief and confined to late afternoons and evenings, leaving most of the day suitable for exploration and sightseeing. The increasing humidity brings a resurgence of vibrant vegetation, adding a unique charm to the landscapes of New Caledonia during this time of the year.

---

• Noumea - September »
  The months with the coldest seawater in Noumea are August and September, with an average sea temperature of 22.8°C (73°F). August and September, with an average sea temperature of 22.8°C (73°F), are months with the coldest seawater in Noumea.
• Mont-Dore - September »
  In Mont-Dore, during September, the rain falls for 14.3 days and regularly aggregates up to 29mm (1.14") of precipitation. On the last day of September, in Mont-Dore, sunrise is at 05:35 and sunset at 17:52 +11.
• Dumbea - September »
  The month with the least rainfall in Dumbea is September, when the rain falls for 14.3 days and typically collects 29mm (1.14") of precipitation. In September, in Dumbea, New Caledonia, the rain falls for 14.3 days.
• Tadine - September »
  The month with the least rainfall in Tadine, New Caledonia, is September, when the rain falls for 11 days and typically collects 35mm (1.38") of precipitation. The month with the least rainfall in Tadine is September, when the rain falls for 11 days and typically collects 35mm (1.38") of precipitation.
• Poindimie - September »
  In the transition from August to September, Poindimie reports an average high-temperature of a still agreeable 22.7°C (72.9°F), indicating a close resemblance to the prior month. Poindimie's average temperature throughout the nights in September exhibits a minor decrease from daytime highs, stabilizing at an enjoyable 18.7°C (65.7°F).
• Kone - September »
  The arrival of September in Kone sees a recorded average high-temperature of a still pleasant 22.7°C (72.9°F), showing little divergence from the previous month's conditions. January through July, September through December, with an average maximum UV index of 6, are months with the highest UV index in Kone, New Caledonia.
• Houailou - September »
  The least humid month in Houailou is September, with an average relative humidity of 74%. In Houailou in September, during 8.9 rainfall days, 21mm (0.83") of precipitation is typically accumulated.
• La Foa - September »
  The month with the least rainfall is September, when the rain falls for 8.9 days and typically collects 21mm (0.83") of precipitation. In September, on the first day of the month, sunrise is at 06:06 and sunset at 17:47.
• Voh - September »
  The month with the least rainfall is September, when the rain falls for 8.2 days and typically collects 15mm (0.59") of precipitation. The month with the least rainfall in Voh is September, when the rain falls for 8.2 days and typically collects 15mm (0.59") of precipitation.
• Isle of Pines - September »
  July through September, with an average high-temperature of 23°C (73.4°F), are marked as the coldest months in Isle of Pines, New Caledonia. In Isle of Pines, New Caledonia, in September, the average water temperature is 23°C (73.4°F).
• Mare - September »
  With ample sunshine, moderate temperatures, and reduced rainfall, September provides an ideal spring setting in Mare, New Caledonia. In Mare, New Caledonia, in September, during 12 rainfall days, 66mm (2.6") of precipitation is typically accumulated.