You may have heard that the National Weather Service Summer Outlook for June - August calls for above normal temperatures across all of the Northwest and below normal rainfall. The news is not good as we come off of Portland's record dry spring, picking up just 27% of normal rainfall for March - May or 2.52" in comparison to the climate average of 9.37 inches.
Individual weather models show above normal rainfall in August, which could be an indicator of convective activity, meaning lightning, but we can hope for the best. (The 2nd map shows Canadian model August rainfall - green color being above normal.) The core of summer heat this summer is likely to be centered over the upper Rockies and upper midwest, as seen on the 3rd map in the darker tan color from the Canadian July outlook.