The tropical oceanic climate is moderated by southeastern trade winds, which blow between the months of May and October. Winds are variable during the remainder of the year, and cyclones may occur. Average midday temperatures in Port-Vila range from 25°C (77°F) in winter to 29°C (84°F) in summer. Humidity averages about 74%, and rainfall on Efate is about 230 cm (90 in) a year.