clay pot vs plastic pot?

[neophyte]

hi, i keep reading that orchids don't like cold roots, and i'm wondering whether the evaporative heat loss in clay pots would chill the roots of my orchids too much. all of my terracotta clay pots are much cooler than the surrounding air temperature and i'm worried that this could retard plant growth. if this is so, would plastic pots be better (since evaporation only happens at the top rather than from all sides of the pot)?