<quote>Mars is F'ing cold. any H2O there is either frozen*, or so saturated with acids and salts that we would hardly call it "water".</quote>

Except at those times and places where it is *hot*:

Title: Thermal environment of Mars
Authors: Martin, T. Z.
Affiliation: AA(JPL, Pasadena, CA)
Journal: IN: The environmental model of Mars; Proceedings of the 2nd COSPAR Colloquium, Sopron, Hungary, Jan. 22-26, 1990 (A92-37298 15-91). Oxford, England and New York, Pergamon Press, 1991, p. 89-100.
Publication Date: 00/1991
"Thermal observations of Mars are reviewed focusing on surface and atmospheric temperatures. Data obtained indicate that the effect of increasing dust in the atmosphere is to reduce diurnal temperature variation at the surface, while enhancing atmospheric thermal variation. Atmospheric thermal effects can be induced by global dust storms even in regions of polar night. Maximum temperatures occur near the equator in summer or at local sites with sunward facing slopes, where low surface thermal inertias make it possible to achieve values up to about 310 K. Radiation and convection in the daytime affect atmospheric temperatures near the surface, which are limited by radiation at night. Results of thermal observations confirm that Mars' thermal state and climate can significantly vary from year to year, due to the variation in dust activity."
http://adsabs.harvard.edu/cgi-bin/bib_query?1991emma.proc...89M

310 K is 37 C or 98.6 F, a rather familiar temperature.

Bob Clark