The storms killed at least 425 people, destroyed thousands of homes and razed 60 percent of the island's agriculture.
Farrow, a UNICEF goodwill ambassador, will also visit sites in Port-au-Prince and the hard-hit town of Cabaret during a five-day tour.
The United Nations has distributed food and water to some 240,000 people, but raised only 2 percent of its US$108 million aid goal.
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