[hahy-et-uh-graf, -grahf, hahy-i-tuh-]
- a map or chart showing the average rainfall for the localities represented.
Origin of hyetograph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a chart showing the distribution of rainfall of a particular area, usually throughout a year
- a self-recording rain gauge