When I used to live there it was quite warm. We had a great house right on the edge of the Valles Marineris.
But we were pretty boring. We just called it the Grand Canyon. The gliders that used the edge as a launching point got to be a real nuisance, though. The updraft was strong enough that cities were built along the edge and one could go from city to city, over hundreds of miles, gliding all the way.
The low gravity helped too.
Yes, life was good on Barsoom.