The results of the measurement of the surface temperature of a flat plate model streamlined by a supersonic air-droplet flow are presented. The plate was mounted in the test section of the supersonic wind tunnel. The droplets of a liquid (distilled water) were pulverized into an air flow in a plenum chamber through the centrifugal atomizers. The mass concentration of the liquid varied from 0.18 to 0.36% for the freestream Mach numbers from 2.0 to 3.0. Reynolds number based on the dynamic boundary layer length from the nozzle throat was at least 2·10⁷ at the nozzle exit section. The surface temperature was measured by an IR imager through ZnSe illuminator. The measured plate surface temperatures for the case of single-phase air flow (without droplets) were compared with those for the air-droplet flow at the same parameters in the plenum chamber. The mean droplet diameter and diameter distribution of droplets were measured with the use of laser shadow SSP method. To intensify the droplet sedimentation on the plate a shock wave generator in the form of a wedge was mounted ahead of the plate.