EnergyPlus weather files are designed for energy simulations. Weather
predictions don't enter into that.
Information on selecting weather data appropriate for energy simulation
is described in this paper:
Drury B. Crawley. 1998. "Which Weather Data Should You Use for
Energy Simulations of Commercial Buildings?" in ASHRAE Transactions,
pp. 498-515, Vol. 104, Pt. 2. Atlanta: ASHRAE. (PDF 197 KB)