The meteogram 14-days shows the weather forecast for the next 14 days period, with a weather symbol, a range of maximum, average and minimum temperatures and precipitation amounts, as well as the precipitation probability for each day.
The range between possible minimum and maximum values shows the possible weather developments.

The weather symbols and the daily temperature maxima and minima appear below the dates, to give an approximate overview of the expected weather conditions.
The temperature diagram underneath the first tabular block also refers to the dates indicated above. The diagram indicates the range of possible maximum and minimum temperature predicted by various weather model runs (ensemble). The thick line in the center of each range is the most probable development, and the upper and lower lines indicate the most extreme development.

In the precipitation diagram, you see the precipitation amount as bars relative to the left Y-axis, with a range of possible amounts indicated by tick marks . The probability of precipitation is a single line, relative to the right Y-axis which ranges from 0 to 100%.  There is only one probability, since probability is based on an aggregation of various possible developments (incl. ensembles).

The darker the bar of precipitation, the more likely is the precipitation.
The bar is green with a chance of precipitation of less than 25%.
The bar is dark blue with a chance of precipitation of above 90%.