The weather in Yukon for May is on average a high of 13 C (55 F) and n average low of +1 C (34 F). The weather in Yukon is always unpredictable, though. We say if you don't like the weather just wait 5 minutes and it will change. However, this is one of the exciting things about experiencing wilderness. All aspects of weather have something to teach us. Come prepared with rain gear, hiking shoes, summer hats, sunglasses and a winter hat and mitts, so you will be comfortable in any weather conditions.