I think the general rule is that it's fine for the face and hands to be cool to the touch, as long as the body's nice and warm. Cot death wise, it's better for them to be on the cool side than to overheat.
With regards to temperature, we work in Celsius, and I don't know how to convert :oops: , but the advice here is room temp to be around 18C, in a sleepsuit/grobag, or two lightweight blankets. That actually seems cold to me, but he seems perfectly happy.
HTH
Caroline