Ok, here's the basic pattern of weather in Eugene...It is cloudy and rains a lot starting in October. By July summer should arrive and July, August, and September are usually amazing: sunny, warm but not hot.
In recent years the impacts of climate change seems to be in evidence. Although it is nothing like the drought in California, there has been a decrease in the amount of rain. Last winter (2013-14) there were two extended snow storms which caused significant damage through downed trees and power lines and exploded water pipes.