It can take from two to six months to find an internship.
It depends on whether you apply for early admission, which provides students with considerable lead time to research internship organizations and contact MIW alums who have worked in those organizations about their experience. Early admission also provides students an opportunity to manage housing arrangements (i.e., find sublets or month-to-month leases). Internships at the CIA, FBI, and DOJ require 6 months for security clearance (and therefore early admission to the program).
Winter term students who are admitted to the program in October have only two months to find an internship. Fall term students who are admitted in March have approximately five months (because of the summer) to find their internships. However, many organizations in Washington do not consider fall internship applicants until late in August because they are busy managing the large volume of students who come in the summer for internship experiences.