The Weather and Climate in Vanuatu
Vanuatu has a subtropical climate. This island nation experiences approximately 9 months of a paradoxically hot rainy weather and 3 to 4 months of dry cool weather characterized by the southeast winds. During those times, cyclones are expected to occur. Trade winds visit the archipelago from May until October. Basically, there are 2 main seasons in Vanuatu, the cold season and the hot season.
The temperature of the country varies very little throughout the year. Being situated near the equator, its equatorial temperature is relatively uniform with a daily average of 26 °C in the coastal areas. In the hot season, temperature reaches its average maximum to 30°C and an average minimum of 24°C. There had been times in the coastal areas when extreme night time temperature has dropped to 13°C. In Port Vila which is the capital on the west coast of Efate, the temperature is a soothing 25°C and becomes 23°C in August during the wettest months and 27°C in February.
Vanuatu experiences an unusual rainfall season. It is during the hot season when the country is hit by heavy rainfall. It is because the topographic features of the country and the seasonal wind flow determine the rainfall distribution pattern. There is also the South Pacific Convergence Zone (SPCZ) that usually shifts over Vanuatu in the summer and especially during the La Nina years that causes rainfall in the hot season. There is variable rainfall on smaller islands.
The driest month in Vanuatu is usually August while the wettest month is March.