County Szabolcs-Szatmár-Bereg produces more than the half of the total sour cherry grown in Hungary. Successful production,i.e. yield, depends largely on weather conditions. Most attention should be paid to the weather during the blooming period, being mostdecisive from the points of view of quality as well as quantity. In order to predict yields expected, the characterisation of the most importantweather parameters is necessary. For that purpose, the database of the Institute of Research and Extension Service for Fruit Growing atÚjfehértó Ltd. has been utilised. Records of weather conditions were collected throughout the period 1984-2005, i.e. daily minimum,maximum and mean temperatures (°C), precipitation (mm), and phonological diary of sour cherry varieties ’Újfehértói fürtös’, ’Kántorjánosi’and ’Debreceni bôtermô’. Data of 7 indicators have been traced: number of frosty days, the absolute minimum temperatures, means ofminimum temperatures, number of days when daily means were above 10°C, means of maximum temperatures, number of days withoutprecipitation, and number of days when precipitation was more than 5 mm. On the one hand, we surveyed the changes; on the other hand,estimates have been attempted for the future changes expected during the following decades. The indicators being associated with certainrisky events may serve for the prediction of the future recommendations to prevent damages
