Using previously published results of' temperature log of the 2363 meter-deep borehole Hunt well (Alberta, Canada) and the results of its previous interpretation, the new reconstructions of ground surface temperature (GST) and surface heat flux (SHF) histories for the last 40 kyr have been obtained. Two ways of the timescale adjustment of geothermal reconstructions are discussed, namely the traditional method based on the a priori data on thermal diffusivity value, and the alternative one including the orbital tuning of the surface heat flux and Earth's insolation changes. It is shown that the second approach provides better agreement between geothermal reconstructions and proxy evidence of deglaciation chronology in the studied region.