Aren't dogs noses supposed to be cold?

Lexi's nose is very warm.

It has been warm since we picked her up 6.5 months ago. Otherwise, she is healthy.

Also, she makes me sweat when she sleeps on my lap because of the body heat she gives off. She's 8 months old, 5 pounds, and her girth is 13". Is this unusual? I never thought to bring it up to the vet and we're not scheduled to go back until June.