Kerala is a small state in the southwest corner of India with pristine waters of the Arabian Sea washing its shores and an equable climate that varies from season to season. The Western Ghats on the eastern side of the state fall across the path of the southwest monsoon, thus, creating two major climatic zones, one with heavy rainfall on the windward side and a dry belt on the leeward side in the east.
Kerala's climate can be classified roughly into three main categories.
From February to May, it is summertime and the climate is generally hot
and humid. The southwest monsoons begin in June and continue till the
middle of October or the beginning of November. In this season, there is
fairly good rainfall without intermission. It is followed by fair
weather during December and January. Though, northeast monsoons do being
some thunderstorms with rains and linger on till the month of February.
However, these spells of rain do not last long but the weather becomes
very sultry. In the mountain ranges, there is heavy fog from April.
Kerala has a moderate and balanced climate throughout the year. Even at
the height of the monsoons, the temperature rarely dips below a pleasant
18 oC. It has a warm and pleasant tropical monsoon climate with
seasonally excessive rainfall. The peak tourist season or the best time
to visit the area is from September to February. The summer months are
warm and humid with a mean max temperature of about 33 oC.
Blessed with plentiful rain, the southwest monsoon or the Edavappathi
bring rains during June-September and the northeast monsoon or the
Thulavarsham during October to December. The total annual rainfall in
the state varies from 380 cm over the extreme northern parts to about
180 cm to the south. The amount of rainfall decreases towards the south
almost in proportion with the decrease in altitude of the Western Ghats.
July receives the maximum rainfall that count up to about 25 rainy days
as calculated by all meteorological centres of the region.