How would you dress in the summertime in czech republic?

Simple clothes? Jeans & t shirts,shirts,dresses..etc..anything thats comfy.Cant tell the weather these days,prolly warm durin days or bit rain & chilly in the evenings.A medium warm jacket wud be good enuf,bring clothes that u can "layer" so that u dun need to be all that extra weight in ur luggage.Hope that helps :)