Abstract: A weather monitoring system comprising a laser precipitation sensor, including a housing, incorporating a bracket, for holding a prism or reflector means useful for deflecting the beam of laser light emitted from a transmitting diode, and for collimating said light and diverting it back into the housing for reception by a receptor diode, wherein the electronic components of the device including a microprocessor, RAM, ROM, and EEprom, all functioning in cooperation to provide an historical analysis and retention of data pertaining to the precipitation type, size, and intensity, of the precipitation that passes through the beam of laser light transmitted by the sensor.