|Universität für Bodenkultur Wien
University of Natural Resources and Life Sciences, Vienna
Institut für Meteorologie und Klimatologie (BOKU-Met)
Rough correspondence between day of hydrological year and month:
0 30 60 90 120 150 180 210 240 270 300 330 360
O N D J F M A M J J A S
Leap days are counted like 1 March in non-leap-years, so leap years have one additional day at the end. Updated daily at 08:16. Update at the beginning of the new hydrological year (1st of October) needs to be done manually, will not be immediate!