Summertime in Alaska cannot be beat. The weather from June through August is warm and relatively dry. There are seldom any heavy downpours, however, light drizzle does occur. This summer is forecast to be one of the drier summers.
If you are planning to prospect in the Kenai Peninsula it is always a good idea to bring a large tarp along to hang up over your camp area. It keeps the tent and everything around it dry. The picture below was a camp setup on Canyon Creek.