The diversity of the physical featurs results in a correponding
diversity of climate. In the plains, the climate is generally hot.
Though the mean maximum temperature is only around 900 F, the heat
is oppressive in the moisture laden atmosphere of the plains. Humidity
is very high and rises to about 90% during the south-west monsoon.
The anual variation of temperature is small; the diurnal range is
only about 100 F.
The south-west monsoon starts towards the end of May or the beginning
of June, heralded by thunder-storms and holds till September when
the rain fades out. October brings in the north-east monsoon. Dry
weather sets in by the end of December. January and February are
the coolest months of the year. March, April and May are generally
very hot. The district has an average annual rainfall of 3500 mm.
Summer & Winter :
Dry weather from December to February. March to May is the hot season.
The coolest months of the year are January-February.
Rainy Season :
The mean annual rainfall of the district is 3581mm, which is highest
in the state. The south west monsoon starts towards the end of May
or the beginning of June, heralded by thunder-storms and hold till
September when the monsoon fades out. October-November brings the
north-east monsoon. Out of the total rainfall, the months June,
July & August experience 2/3 of the quantity.