The Thousand Isles has an oceanic tropical climate, warm and humid. Temperatures in the region are stable all year round, varying from the low 90's F during the day to the low 80's at night. Precipitation is highly variable, depending greatly on the direction of the dominate Trade Winds. During the springtime rainfall is greater in the northern and western (windward) coastal areas and mountains, averaging 50 inches annually; much lower in the western (leeward) areas. However the heaviest rainfall generally occurs in the fall and winter, when the Trade Winds reverse, and the southern and eastern coastal areas receive the lions share of precipitation.
The winter also often brings typhoons and monsoonal rain, some regions can experience 200 inches or more annually.
Rainfall can also be highly variable depending on local geography and the associated rain effects created by the regions many high volcanic mountains. Some coastal areas receive heavy rain the entire year round, especially at sunset, while other inland areas in the rain shadow of mountains may be virtual deserts year round. For instance, average annual precipitation in the "desert" region of Cerro Rico is only 20 inches.
Droughts are frequent, sometimes lasting several years. The typical variability of the sea-level climate in the region is well illustrated by measurements made at the Haven University weather station at Haven Towne. The highest recorded annual rainfall there is 148.2 inches; the lowest is 22 inches, a year when the monsoonal rains did not arrive at all.
see also: Weather in the Thousand Isles