This raster dataset provides the maximum temperature in the Upper Devonian formations in the Midland Valley of Scotland. The reservoir temperature is modelled over the extent of the base of the Kinneswood Formation and Stratheden Group, based on an updated geological model created by Kearsey, T.I., Receveur, M. and Monaghan, A.A., 2024. Modelled hot sedimentary aquifer geothermal potential of Upper Devonian strata in the Midland Valley of Scotland. The model is presented with high uncertainty.