SF itself has even more fine-grained microclimates than the peninsula (which only has a few). I didn't (immediately) find out how the wikipedia climate numbers were assembled nor what weather station(s) weatherspark gets data from, but if it's a single weather station, the data gathered is nigh-useless.

weatherspark looks very nice btw, I'm going to go look if they have an android app.... seems there isn't one. oh well.

Is there any neighborhood that experiences higher average temperatures in the winter? I've spent most of my time in South Beach, FiDi, and Outer Sunset, and while I never kept records, it always seemed to me like each of those had a higher average temperatures in the (late) summer.