All humanoid type races do best on a type 50 planet (Temperate - warm).
The Crystalline race does best on temp 100 (Desert World).
The Siliconoids also like temp 100 worlds.
Both races have their maximum growth rate on hot worlds.
The Lizards are unable to regulate their body temp so they to like type 50 planets the best.
Two races are able to withstand desert climates well enough to support a small desert outpost of 6,000 colonists.
These races are:
The Rebels are able to build outposts that support up to 9,000,000 colonists on ice planets. An ice planet is any planet with a temperature of 19 or less.
All other races can only have one clan on a desert or arctic planet.
There are three ship classes that are able to transform a planet's climate just by orbiting it. Each ship will change the climate type by 1 each turn.
Ships which are transforming the climate of a planet will report the temperature of the surface of the planet each turn.