High demand for oil.

Dispite the increasing of oil price recently, the demand for oil is still high in the US. Acording to the BBC News, the demand for crude oil will grow even faster than expected. The International Energy Agency, set up by governments to monitor oil stocks in the 1970s, said demand would rise 1.8 million barrels a day to 84.3 million.
Beside some normal reasons that affect oil price like car industry... Do you think that freezing weather also affects oil price, since there are alot of electric equipment used in cold weather?