We know the exact rate at which seawater expands with temperature, and the expected increase in sea level calculated from the observed increase in temperature matches the observed rate of increase of sea level.
But it is impossible to say, without running the whole exercise afresh, what the properly calculated range of projections for temperature changes would be.
It presupposes that there is such a thing in a chaotic system as a "global climate" from which a global mean temperature can be calculated and that it can in any way measurable with any accuracy.
When the effects are calculated in a standard climate model, the result is a reduction in average temperature of 0.00005oC (one twenty-thousandth of a degree Celsius, or one ten-thousandth of a degree Fahrenheit).
The most basic of the indexes rates a world's suitability for life based on its place within a habitable zone, which is calculated by a planet's distance from its parent star, the star's luminosity and temperature.