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Hail, a climatic hazard in the Western Romanian Plain, North of Mureş River. In the present paper meteorological data have been used, as far as the annual number of days with hail is concerned, from a number of 10 weather stations, during the period 1961-2002. In the Western Romanian Plain, North of Mureş River, an annual average of 0.7-1.3 days with hail is recorded. The most frequent cases are registered in Arad Plain, Ier Plain and at the eastern limit of Crişuri Plain, on the contact with Crişana Hills, where the air and soil humidity is high, or where the plain meets the hills. In Crişuri, Arad and Aranca Plains, most days with hail were produced in the second decade, while in the low Someş Plain, in the third decade of the analysed period. On the analysed territory, the hazards generated by hail occurrence decreased in the latest years, except for the low Someş Plain and the area around the city of Oradea, where they increased. The cause of the decrease of hail resides in the persistence of a long dry period during the latest years (1982-1994), and in the decrease of the values of the relative air humidity, especially between 1990 and 1995 and in the years 2000 and 2002.