Just an idea, but I do know 10°C for many is really cold, and I do know it is tiring to be exposed constantly to cold.... So... it would give one more variable for players to think about if they were forced to be cold. Might even enhance some gameplay aspects by giving a tangible result for your efforts of staying warm.
*for reference I think 25°C would be about room temperature on mars, because I expect the air to be quite dry in the habs as the moisture would condense on all exposed walls.
* of course make it a sliding scale so at 19 it is hardly noticeable but at 2°C it is very rapid fatigue with a need to rest every short bit.
Just a thought though.