The island of Saba enjoys warm temperatures; the trade winds and the mountain create ever-changing cloud movements. Winter evenings often require a light sweater. The annual mean temperature is 27°C (80°F), varying by no more than two or three degrees throughout the year. The temperature can drop to 16°C (60°F) on winter evenings. When climbing Mount Scenery, the temperature will drop by approximately 0.2°C (0.4°F) for each 100m (330ft) gained in altitude. The average rainfall is 1667mm annually.