In case of food retail industry, the extreme weather conditions
play a minor role in sales increase and decrease (Agnew and Thornes, 1995). In this study, the weather parameters such as
maximum air temperature (degrees Centigrade), precipitation (mm), fresh snow depth (cm), snow
depth (cm), sunshine duration (hours) and relative humidity (%) are considered and the data are
collected from German Weather Service (Deutscher Wetterdienst (DWD)) (from January 2010 to April
2014). The weather station is situated nearly 5 km from the food retail store under study. The
collected weather data are used here to model the extreme weather conditions, not the
seasonal effects, which can be modeled using month-of-the year seasonality. Maximum air temperature, precipitation, sunshine duration and relative humidity of a day are the average values
from 7 am to 8 pm (around working hours of store) at the selected weather station. The fresh
snow depth is the snow depth in last 24 h. The fresh snow depth and
snow depth are taken as the average values of a day.