1. The source region of air at particular time.a northerly wind will bring warm air to sydney as it is coming from closer to equator whilts a southerly will bring cooler weather as it is coming from closer to pole.
2.THE amount of insolation(INcoming SOlar radiATION)and the angle of incidence of this radiation...
3.the albedo(reflecive index of the area).As air is heated from below and a dark surface will heat the air above it faster,than a light surface,air does not warm fast in winter when there is a snow cover......
i hope ill help you........
GOD BLESS!!!!!
