This is an interesting idea, but the very first page I looked at was wrong (current weather in Alameda county shows as 72* - it's almost 30* below that here, and the daily high in the warmest areas is projected to be 65).

Next I looked at San Francisco, and oddly it listed a bunch of minor earthquakes in San Ramon - none of which are listed in Alameda county, which is actually next to (and parts of which actually felt) those tremors.