The people of the city I live in self-identify with the term "four seasons in one day", because of how quickly our weather can change, and the extremes it can reach. As of me posting this, the weather is overcast, and the temperature is just below 20C, but I believe is expected to change to only partially cloudy and reach the mid-twenties by the early afternoon. Very annoying weather for the start of Autumn now, but okay in the afternoon... if the forecast is right.
I wish it would now here. It did in Oakland once a few years ago, but that like 20 minutes away from my house. The weather here is all wacky, and it always is. Its been cold, then it randomly rained the other day. Its been cold, but now its warm outside and the sun is shining. That Bay Area weather for you I guess.