Abstract: The rain gauge with a particulate separator is a balance-type precipitation gauge having a particulate separator for removing sand, dust and other environmental particulate matter. The particulate separator includes a spherical particulate separator mounted beneath a central nozzle and above first and second receptacles of the gauge. A frustoconical particulate separator is mounted beneath the spherical particulate separator and above the first and second receptacles, a central channel being formed therethrough. In operation, liquid flows through the central nozzle and clings to an outer surface of the spherical particulate separator, flowing through the central channel to alternately fill the first and second receptacles. Particulate matter flowing through the central nozzle is deflected by the outer surface of the spherical particulate separator to strike an inclined upper surface of the frustoconical particulate separator, falling through at least one vent formed through the housing to exit the housing.