Hard to tell. It looks mostly hit-and-miss showery until probably after your event when more sustained rain moves in. But, of course, if you are in the "hit" area prior to that, you'll be wet.
Morning mesos don't have much for later today, pretty isolated and a better chance to the NW. Most of our upcoming rain is going to happen behind the frontal boundary which comes through midday tomorrow.
Another 80 and another +20 at DCA. Going to end up between +6 and +7 on the month, so despite the wind it was a torch.
edit - and probably a record high minimum.