Flow chart providing an overview of the methodological steps implemented in the framework of this study. The chart consists of two interrelated sections, pointing out for (right) parametrization and assessment of the frost stress model for winter pea crop and (left) daily climate data interpolation at 12-km-grid resolution from 1961 to 2015. KED is the kriging with external drift method which is similar to regression kriging (Hengl et al., 2007). An automated interpolation based on the AUTOMAP R packages (R Core Team, 2016; Hiemstra et al., 2009) has been used in this study.