The ranges are optimized for each individual station, i.e. they most likely differ from station to station.
The time period can differ between the stations due to potential problems in the data transfer or sensor failure.
The graphics are updated daily. They are generated automatically and show raw, i.e. not controlled values,
and base on mean hourly values. Grey areas indicate missing values. Most gaps are given by calibration of the instrument.
Time information is given in local wintertime (UTC+1).