weather

when you say ' it is cold today ', or it is rainy day ',you are talking about the weather . weather refers to how , cold , rainy , windy or cloudy it is , in a particular place at a particular time

climate

when you say, 'it is very cold in the mountians ' , or ' the coastal plains are warm and humid ', you are talking about the climate . Climate refers to the weather conditions of a large area taken over a long period of time .