Temperature: average temperature of the hour (0C);
Precipitation: total precipitation of the hour (mm);
Snow: whether it has snowed or not in the hour (1 yes, 0 no);
Visibility: the distance could be clearly seen in the hour (km);
Pre. Rain: whether it has rained or not in the previous two hours (1 yes, 0 no);
Pre. Snow: whether it has snowed or not in the previous two hours (1 yes, 0 no).