The WeaTran software, which is available free-of-charge through the University of Dayton via the link below reads TMY and EPW files and translates the data to other useful formats.
In addition, to help summarize a climate graphically, it displays a psychrometric chart of monthly temp and humidity data as well as a time-series chart of monthly solar radiation. It can also calculate solar radiation on any surface (or on any four walls) using TMY or TMY2 data.

http://academic.udayton.edu/kissock/http/RESEARCH/WeaTran.htm