Recalibrated data of the REMS-H relative humidity sensor of the Mars Science Laboratory (MSL) Curiosity rover. The dataset is based on the raw sensor data available in NASA's data product archive Planetary Data System (PDS). A detailed description of the dataset and the recalibration process is presented in the manuscript "REMS-H Revisited: Updated calibration and results of the humidity sensor of the MSL Curiosity" by Hieta et al. (submitted to Space Science Reviews). The dataset includes the relative humidity and temperature of the sensor, the derived water vapor volume mixing ratio and uncertainties.