Answer. T-shirts and shorts are good clothing options during the daytime but after the sunsets the climate gets chilly and one requires a jacket and pullover. If you are trekking to the peaks of 4000 meters above sea level, you need warm woolen clothes. Rain and snowfall can take place in June and July and if you are travelling in this season then you should carry windcheaters and raincoats. If you are into trekking, a pair of waterproof shoes is a must.