Although we're suffering through endless summer and tropical moistness, we should, in theory, be only weeks away from the first freeze in our region (minus DCA, which may never have a freeze again).
You are forecasting the first day the temperature reaches 32F at these locations:
DCA:
BWI:
IAD:
RIC:
Tiebreaker: October rainfall at IAD.
Lowest total departure wins! This thread will lock at midnight September 30th.