The Carfax looks fine on the '15. Too bad it wasn't a plum car that only resided in the PNW. It's unclear where the vehicle spent most of its time. SF is GREAT for a Leaf. I think Oakland usually doesn't get as hot as the South Bay. Sunnyvale and Fremont are much warmer but aren't crazy hot like Dublin, Concord and Walnut Creek. If it was used to commute, it's unknown where home and destinations were. See my earlier comments on the Bay Area microclimates.
Would be curious to see Leaf Spy, AHr, SOH and Hx values. Hopefully you still have at least 1-3 years before you lose your 1st capacity bar.
'13 blue Leaf SV w/premium package (owned)
'13 blue Leaf SV w/QC + LED & premium packages (lease over, car returned)