Since SF is on the narrow tip of a peninsula and surrounded by water on 3 sides, the temperature fluctuates much less than locations inland or even just along the coast. The temperature basically hovers around 60F year-round, a few degrees cooler in the winter, a few degrees warmer in the autumn.

I didn't know this before moving here, I don't know if I'd call it _amazing_ weather but it's certainly odd to watch the rest of the country deal with insane heat and cold while SF basically just... stays at 60.