Among all the factors of geographical environment to which man is subjected climate is of prime importance. Climate governs not only the agricultural activities but also natural vegetation, water, supply, human settlement and industries.

In general the climate of the state of Assam characterised by -

(a) Relative coolness: The state is experienced with maximum temperature i.e. July-August ranges from 30°C to 33°C, the minimum temperature i.e. December-January ranges from 8°C to 15°C. The Lowest recorded temperature is found in January.

(b) Relative Humidity: The climate of the state with mo, e humidity According the Vadimir Koppur. Assam enjoys Humic Mesothermal Gangetic type climate But local observation reveals that the climate of the state varies considerably from the normal 'CWG climate of the Gangetic valley. Moreover, the winter is dry which the summer is we're The average humidity of Assam is about 80% (summer) which slightly drops to 65% to 70% from January to April.

(c) Rainfall: Assam experiences an average annual rainfall of 250 cm. During winter (December to February) the average annual rainfall is 6 cm and in Summer (March to May) it is about 64 cm. The Maximuni fall is experienced in June to September 1.e 146 cm and about 14 cm in October and November. The average rain fall in Assam is more than 2.30 cm. There is a district drought period. Number of rainy days with more

then 2.5 mm is 122 days in the eastern part, 106 days in the central part and 130 days in the western part of the state.