The winter season  in Himachal begins from October . By October the sky is clear and morning and evenings are bracingly cold. Humidity is low. Morning and evening in the valleys are very cold. Snowfall occurs in the higher hills generally in December and January and occasionally it may be experienced earlier or later. The average snowfall is about three meters and lasts from December to March. Above 4.500 meters perpetual snow. By the end of February temperature begins to rise slow.