It is the total of weather conditions and variations of an area for a long period of time. It includes study of temperature, rainfall, atmospheric pressure etc. 

Weather refers to day to day changes in our atmospheric conditions. It also includes temperature, rainfall and atmospheric pressure. 

Inter Tropic Convergence Zone 

1. The areas or the side of a mountain which gets more rain is called the windward side.

2. It receives more rain because it is front side of the mountain.

3. Mumbai is on the windward side. so gets heavy rainfall. 

1. The sloped side of a mountain which is dry and gets less rain is called the leeward side.

2. It is dryer because when the clouds climb the mountains, they lose most of its water, so this part remains dry.

3. Pune is on the leeward side, so gets the less rainfall. 

1. The Himalayas intercept the south west monsoon and cause rainfall in the northern India.

2. They prevent the cold wind of central Asia from entering into India.

3.  The Himalayas check the monsoon wind and do not allow them to cross otherwise the North India would be a desert. 

1. Monsoon advances in the month of June and covers the country in about a month.

2. The low pressure condition intensifies over the northern plains by the beginning of June.

3. It attracts the trade winds of the southern hemisphere.

4. These south east trade winds originate over the warm subtropical areas of the southern oceans flowing towards south westerly direction, crossing the equator and entering in the Indian peninsula like the south west monsoon. 

1. The monsoon trough or the low pressure trough becomes weaker over the northern plains with the apparent movement of the sun towards the south during October-November.  

2. This is replaced slowly by a high pressure system. The south-west monsoon winds begin withdrawing slowly and steady. 

C.  The monsoon withdraws from the northern plains in the beginning of October.  The October-November months from a transition period from hot rainy season to dry winter season.