Planning for the weather is a good way to make your trip to Nouméa relaxing and enjoyable, especially when you’re splurging. The hottest months are usually February and January, with an average temperature of 25°C, while the coldest months are August and July, with an average of 20°C. The rainiest months in Nouméa are January, February, March and April, with each month seeing an average of 288 mm of rainfall.