I have about 7 1/2 hours in New York before I have to get on another plane. Is thier enough time to go see the 9/11 memorial and museum? My fiancé is worried we won't have enough time because we have to go through customs to go out of the country.

Although "on paper" it would appear that you have enough time, between customs, teaffic, and the weather, I would either stay put in the airport, or at least limit your sight seeing to one attraction or the other, and maybe add a quick lunch or dinner with your fiance'.

Yep

Hell noooooo... in this rain and Manhattan traffic at this time. You better enjoy the comfort of a warm and dry airport terminal before you lose your flight.