As has been discussed, we've had a number of historically warm and dry Mays recently that have effectively spelt the beginning of our summer. For our grass as well. You don't have to go back to 1983 since I'm pretty sure we've all witnessed it.
Have you ever had a summer where it didn't go brown? It definitely still takes semi-consistent rainfall that soaks relatively deep into the soil. Which is why even on the coast the grass tends to be browning by August, even with the cooler temps and more regular marine layer drizzle.
Troughy days can be gorgeous too. Yesterday was spectacular... so is today. But its not going to be troughy all the time. I love a sunny day after a rainfall in the warm season too. It's even more special when it happens in the middle of summer.
If you want this weather all summer then I would suggest Sitka or Juneau. The climo reality is that Seattle and Portland average 200+ days a year without rain so climo says the day you are experiencing today is in the minority.