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Hourly Forecast
Daylight Hours
05:51
Sunrise
17:56
Sunset
Moon
Waxing Gibbous
16:38
Moonrise
05:10
Moonset
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View stargazing scoreWeather in Koumac today, September 25, 2026
Rain features in Koumac on September 25, 2026, so keep waterproofs handy through the day. The damp theme is strongest where shower chances rise.
Temperatures climb from an overnight low near 19°C toward a daytime high of about 25°C. The air stays humid, with relative humidity between 62% and 76% and the peak around 23:00. Winds stay light, near 4.6 km/h by 14:00, so the day feels still more than breezy.
Expect the wet theme to continue later, as rain odds reach 90% near 14:00. Cloud amounts hold near 56% around 14:00. Visibility stays near 16.1 km. Sunrise is at 05:51 and sunset at 17:56, giving 12 hours 5 minutes of sunlight today.
In short, treat September 25, 2026 in Koumac as a damp day: pack covers, watch the wetter hours, and expect a high near 25°C.
Frequently asked questions about weather in Koumac
How warm does it get in Koumac?
The warmest month in Koumac is January, with average high temperatures of 29°C. The average temperature during this period is around 27°C.
How cold does it get in Koumac?
The coldest month in Koumac is August, with average low temperatures of 19°C. The average temperature during this period is around 21°C.
What is the wettest time of year in Koumac?
The wettest month in Koumac is February, with an average of 196mm of precipitation.
What is the driest time of year in Koumac?
The driest month in Koumac is September, with an average of 26mm of precipitation.
