Bronnen:
MONV (februari 2020): https://cdn.knmi.nl/knmi/map/page/klimatologie/gegevens/monv/monv_202002.pdf
L13 (sinds 1906): https://climexp.knmi.nl/getindices.cgi?WMO=KNMIData/precip13stations&STATION=Nederland&TYPE=p&id=someone@somewhere&NPERYEAR=366
102 homogene neerslagreeksen (sinds 1910): https://climexp.knmi.nl/getdutchstations.cgi?id=someone@somewhere&TYPE=preciphom1910