I live in Maryland and lemme just say - the weather fluctuates like crazy! Especially in the spring and fall. One night you're layering blankets and the next you're ripping them off. I always find it more convenient when the quilt is 'heavy' as opposed to 'warm' in this kind of climate. That way it weighs down my other blankets or just lets me rest with nothing more than a sheet.
Regardless, I'm sure they'll love it! I sleep with a quilt from my great aunt every night.