While quickly looking into it, I didn’t find relevant information about the effect of temperature, unless you like to extract cafestol using methanol. That will spice up your morning brew!

However, I did find this graph, that shows the effect if roast level. Dammit, why did it have to be this way. I don’t even like dark roast.

Regardless, temperature usually has an impact on extraction rates. Higher temperatures make things happen faster and better as long as we’re not talking about dissolved gases.