The wet summer season lasts from December through March. The cooler, drier winter season falls between May and October. Although temperature changes are noticeable, the average number of days of rainfall in Suva varies little from month to month. Humidity during summer is usually high, often reaching 90% and above. Fiji is in the hurricane zone. The last hurricane to hit Suva directly was Cyclone Kina, in January 1991. In March 1997, Cyclone Gavin swept through northern Vanua Levu and the northwestern part of Viti Levu, devastating several outer island-groups. Southeast trade winds blow steadily from March to October, with variable winds during the Southern Hemisphere summer.