Tropical with average annual rainfall varying from about 37" to 228". South West quarter and Central Region (approx.1/3 of the Island) receives average 79" with a highest range between 158" to 228" being restricted to Western slopes of the Central Hills and North Eastern Hill Country. A little less than 2/3rd of Sri Lanka receives less than 79". The lowest average rainfall is less than 40" is confined to the extreme North Western and South East Region of Sri Lanka.

Average temperatures: