In this work, the weather conditions and wind power in the eastern part of Saudi Arabia over a period of 36 years (1961-1996) are studied and modelled. The study involves temperature, relative humidity, fog, wind speed, wind power and dust storms. A regression analysis is carried out by using the linear regression technique to model the weather parameters. The models developed can be used in any study related to weather and its effect on the environment and energy. Copyright (C) 1999 John Wiley & Sons, Ltd.