The climate of Assam is characterised by its extreme humidity. Its
most distinguishing feature is the copious rainfall between March
and May at a time when precipitation in upper India is at its minimum.
Climatically the year may be divided into the cold season and the
rainy. The cold weather lasts from October to February and the rest
of the year is rainy. The southwest monsoon begin from middle of June.
The neighbourhood of Cherapunji and Mawsynram are known to receive
the highest rainfall in the world. It is concentrated in four months,
June to September.