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CLIMWAT is a climatic database to be used in combination with the computer program CROPWAT. and allows the calculation of crop water requirements, irrigation supply and irrigation scheduling for various crops for a range of climatological stations worldwide.

CLIMWAT provides long-term monthly mean values of nine climatic parameters:

  • Mean daily maximum temperature in °C
  • Mean daily minimum temperature in °C
  • Mean relative humidity in %
  • Mean wind speed in km/day
  • Mean sunshine hours per day
  • Mean solar radiation in MJ/m2/day
  • Monthly rainfall in mm/month
  • Monthly effective rainfall in mm/month
  • Reference evapotranspiration calculated with the Penman-Monteith method in mm/day.