Inter-annual boxplot of the October to March average minimal and maximal temperature in Burgundy-Franche-Comté for observed (station scale) and interpolated i (grid-scale) data. Each dot is the average T_min or T_max temperature of a station (observed) or its nearest grid point (interpolated). The dark bold line in the boxplot is the median. The two ‘hinges’ of the box are the first (Q1) and third quartile (Q3). The upper whisker is equal to: min(max(x), Q3 + 1.5 × IQR); the lower whisker is equal to: max(min(x), Q1 − 1.5 × IQR) where IQR is the inter quartile range equal to: Q3 − Q1, i.e. the box length. A point corresponds to an outlier which is defined as a data point that is located outside the fences (“whiskers”) of the boxplot (e.g. outside 1.5 times the IQR range above the upper quartile and bellow the lower quartile).