Iced coffee on a hot day

Today, I was drinking an iced coffee when I noticed that as the ice was melting when I was about to finish my drink, water condensed on the outside of the cup.  This was due to the lower temperatures on the surface of the cup.  The lower temperature cooled the air near the cup. At lower temperatures, the air can hold less water, causing the water in the air nearest to the cup to condense.