It has two seasons: a warm, humid summer from November to April, with an average temperature of 24.7 degrees Celsius, and a relatively cool, dry winter from June to September, with an average temperature of 20.4 degrees Celsius. The warmest months are January and February. Although there is no distinct rainy season, most rainfall occurs during the summer months. There are occasional tropical cyclones, usually between January and March, which bring torrential rains.
Mauritius ranked second in an air quality index published by the World Health Organization in 2011.
