@Kai_zp I’m using the legacy version of LB-HB, see this post. Surface temperatures are calculated by EnergyPlus, which indirectly uses air temperature (from EPW) for convection heat transfer. Direct/diff and Horizontal IR are all from EPW. for UTCI, Ta and RH are from the morphed EPW by UWG (in my previous comment), rather than the original EPW.
Best,