We obtain the historical meteorological data from the website of DMI (Dutch Meteorological Institute). DMI measures and predicts various daily data, such as cloud cover, humidity, mean daily temperature, wind speed, precipitation amount, etc. We test all the major meteorological variables and whether there is a correlation between the particular variable and electricity infeed. Although there is some correlation between humidity and electricity demand for some hours of a day, it is decided to include only the temperature effect in the model, since the effect of humidity was only sporadically significant.