Coffee futures increased on the unfavorable weather conditions in Brazil and Colombia, the world's largest coffee exporters. The Colombia's coffee output is expected to be steady in the 2011-2012 season as strong rains damaged plants, said the National Federation of Coffee Growers of Colombia. On the ICE Futures Exchange, Arabica coffee for March delivery was traded at USD2.3105 a pound at the early U.S. trade, gaining 0.62% since opening.