In recent years, the computation of load and energy requirement in bui
ldings, energy conservation studies in buildings, and the design of so
lar systems are not accomplished using long-term averages of weather d
ata as inputs, but preferably with data-sets representative of the cli
matological features of the site that are generated for this purpose.
Such data-sets are the test reference year, typical meteorological yea
r and weather year for energy calculations. In this paper, the basis,
the selection procedure and the use of each of these data-sets are dis
cussed Also, an attempt is made to generate typical weather years for
the cities of Dhahran, Riyadh, Jeddah, Khamis-Mushayt and Hail, using
the standard meteorological data obtained by measurements by the Meteo
rology and Environmental Protection Administration.