How to calculate the hourly wind speed

The hourly wind speed from the table has to be divided by 10, since it is defined in 0.1 m/s.

Notes

The wind speed (hourly, and daily average) can also be based on an other data source; Potentiele wind (UP): http://projects.knmi.nl/klimatologie/onderzoeksgegevens/potentiele_wind-sigma/. These values are often a few 0.1 m/s higher than the values from the historical KNMI weather data table.