Abstract: The paper aims at investigating the thermal stress and risk factors within the maximum sensitivity period of the winter wheat (heading – flowering – grain filling). Through their intensity, frequency and duration, they may have negative effects on the vegetation state, finally determining the reduced, moderate or severe crop yield reduction. The study was carried out at two meteorological stations, situated in the Timiş Plain: Timişoara and Banloc. Knowing the incidence, frequency, duration and intensity of the agrometeorological stress and risk parameters and of crops vulnerability, it gives the possibility to minimize their impact on the yields by adopting certain efficient strategies and measures for protection at local level.