The temperature of a planet is a rough estimate of the average across the entire surface over the course of a year.
| Temperature | Kelvin |
|---|---|
| UltraCold | 50 |
| ExtremelyCold | 100 |
| VeryCold | 200 |
| Cold | 250 |
| Cool | 273 |
| Standard | 293 |
| Warm | 310 |
| Hot | 330 |
| VeryHot | 360 |
| ExtremelyHot | 400 |
| UltraHot | 600 |
Standard is about the only sensible temperature for human life.
Cool worlds will have some hospitable areas, and will probably have liquid water in places if there is an atmosphere. Surviving will be a challenge however.
Warm worlds can be of two types - wet or dry. Dry worlds are generally deserts, though liquid water may be plentiful life will be limited to a few wet areas. Wet worlds will be steamhouse jungle worlds with no ice caps.
Cold worlds are snowball Earths or worse, with no liquid surface water. They are unlikely to have much oxygen, and only the simplest life forms (lichens, bacteria) will be present.
Hot worlds are barren, desolate worlds. Any oceans are likely to be small and dead.