The area's varied climate is governed by the monsoons. Although Hong Kong lies within the Tropics, it enjoys a variety of weather because of these seasonal winds. The winter monsoon blows from the north or northeast from September to mid-March, and the summer wind blows from the south or southwest from mid-March to September. During the summer monsoon, the weather is hot and humid; during the winter monsoon it is cool. Average temperatures range from 58°F in February (with lows in the 40's) to 82°F in July (with highs in the 90's.) The mean relative humidity ranges from a low of 67% in November to 84% in May; many days the humidity approaches 100%, accompanied by heavy clouds. Late fall is the most pleasant time of year, generally with dry and sunny weather and high temperatures of 70° to 75°F. The average annual rainfall is 95 inches.