Except in the central highlands, the climate is warm and humid. Average humidity in Managua in June, the most humid month, is 84%; in April, the driest month, 62%. The mean temperature, varying according to altitude, is between 20° and 30°C (68° and 86°F). In Managua, monthly average temperatures range from a minimum of 23°C (73°F) and a maximum of 30°C (86°F) in January to a minimum of 26°C (79°F) and a maximum of 31°C (88°F) in July. There are two seasons: a wet season, from May to December, and a dry season, from January through April. Rainfall, however, varies according to region, and the rainy season in the eastern area may extend 9 or even 12 months. Average annual rainfall along the Mosquito Coast reaches 254–635 cm (100–250 in) as a result of the easterly trade winds blowing in from the Caribbean; the highlands also have heavy rainfall. Managua receives 114 cm (45 in), while the Pacific coast averages over 102 cm (40 in) a year.