A couple of years ago I rode an organized century called the Bay Country Century along the western side of Chesapeake Bay in the aftermath of hurricane Erensto. Lots of rain, down trees - the road looked like salad with some many leaves and branches down. It turned out to be a fun event and didn't rain the whole time.
In two days the Civil War Century is being held - again the aftermath of Hannah is forecast to bring rain and winds. Should be warm enough (around 80) - so far it is a go.