wear tights under the shorts in case it gets cold? :3 and you could take em off and shove them in a bag if it gets warm maybe? idk
(lol where i am everyone is so anxious to wear shorts that the minute the temperature hits like... high 40s, its just booty shorts for miles. xD its not uncommon to see girls sporting the tiny-shorts-winter-jacket-ugg-boots outfit haha.)