Jeans are fine, really.... we did think the other day we didn't mention that.... seems we assume if it's sunny you'd rather have shorts than a dress. But definately, bring jeans if you think that's what you'd rather be in! I am planning to change into clam diggers.
Well...just give us an idea of what to expect in the way of temperature ranges and all and say "dress appropriately".
Maybe I'd better look at the climate data for Seattle in June. :)