The GPM Ground Validation Ceilometers UConn dataset includes ceilometer cloud height measurements. These data were collected during the GPM Ground Validation Field Campaign at the University of Connecticut (UConn), which provided an unprecedented set of wintry precipitation observations from multiple traditional and novel precipitation measurement instruments that can be used for validating ground-based and satellite remote sensing observations. The ceilometer dataset files are available from December 15, 2023, through May 21, 2024, in netCDF-4 format, with associated browse data available in PNG format.