Stroll down to the Rose Test Garden and sniff the roses all dripping with rain drops. Some smell like bananas. Some smell like tea. Some smell like jasmine. Some smell like roasted caramels. When you start to get cold, pop into the gift shop for a sample of rose petal tea. Sip it while you wait for the bus.
Go downtown. Stop at The Nordstrom Rack for some retail therapy. Buy a pair of skinny jeans because Portland's uniform this summer is Tom's, a pair of vividly colored skinny jeans and a loose fitting button down, preferably a chambray shirt or a subtle plaid. Step outside to see that the rain is now torrential. Hop on the bus and ride around for fun, watching people darting through the rain, jumping over puddles and hustling inside.
Pop into World Famous Powell's Books and browse through acres and acres of glorious books. Buy a few cute postcards and some great father's day cards. (Why are cards for men so impossible to find?) Grab a cheap slice of vegan pizza and a side salad at Sizzle Pie.
Head back to your home away from home via Airbnb. Stay with Heather in Arbor Lodge. Her house is clean, pretty inside, has wireless and is near the Max line. How else could you stay so comfortably in Portland for around $50 a night?