The nice months are late-May through early-Oct, highs for most people of 60-90 and lows from 30-55 (a bell curve over those months, naturally). The rain/snow is the opposite - late-Oct through early-May, highs of 25-55 and lows of 10-40.

It's pretty much sunny through the mid period of the nice months, and pretty much consistent rain through the mid period of the other months. Outside of that it can either be pleasant or grey and drizzly. Some years you get grey and drizzle up until the Summer Solstice (like this year), and the sun can continue well past the Fall Equinox (like this year). Everything right now is all browned out and dry as a bone with little to no rain in sight for a lot of WA. Fires are a problem and there's a lot of smoke. Other years we'll be getting drenched.

You'll get some variation on this theme depending on East vs West and elevation. There's a banana belt out on the islands, a lot more snow in the mountains, and a lot more heat and cold out East. Overall it's decent enough but you have to like rain and cool more than dry and warm or you'll be miserable.