Explanation:

The contrast between summer and winter is well marked, and these two primary seasons are associated with two main crop seasons of
kharif in Summer and rabbi in winter West Punjab recieves more rain in winter from Westerly cyclones.The Bist-Doab region is semi-arid to sub-humid. Its average annual rainfall is slightly more than 60 cms. Year-to-year fluctuations are great which may be about 25 percent on either side of the annual rainfall. Rainfall varies from about 150 cms in the Shivalik hills in the north and northeast to less than 25 cms in the west and southwest. Rainfall belts parallel to the Shivalik hills,and the amount of rainfall declines as one move from them. The number ofrainy days also differs in the same manner. The Shivalik hills may receive rainfall of at least 2.5 mm on about 45 days in year.The intensity of rainfall is high on and near the Shivalik hills and it gradually declines as one recedes towards the south and the southwest.