Akram,
Any enclosure, less it is very small, drafty (wind) and/or heat-conductive (e.g., metal),
should maintain the inside ambient-temp a "few" degrees above the outside - due
to the geothermal-buffer-heat coming from the (warmer) ground below...
Sorry, if (?) I had mislead anyone before?
Also, being in an enclosed space; the another killer, drying-wind is minimized.