Mary Springer told me she wanted to have a tee shirt printed that said: First you're hot, then you're not! While this could apply to a number of things, over the past few "summer" days it's certainly applied to the weather.
Yesterday I was reminded that in Seattle, blue skies don't necessarily mean warmth. I nearly froze waiting for the C line to take me downtown; of course I didn't have a jacket.
Summer jackets seem wrong, but they do come in handy. Linen is a nice choice for one in a summer-weight, vis a vis this little number from Prairie Underground.