Like most reptiles, rattle snakes are poikilotherms meaning their internal temperature changes along with the external temperatures of their environment. But in short; Yes, rattle snakes are cold blooded.
Hope this helps:)
Asked in Rattlesnakes
How is a rattlesnake different from a bat?
I bat is a mammal, warm blooded, covered with hair, that feeds milk to its young and is able to fly. A rattlesnake is a reptile, cold blooded, covered with scales, provides no parental care to its young and is not able to fly. ...
Asked in Animal Life, Chimpanzees, Seahorses
Is there an animal which is cold-blooded and warm- blooded?
no there isn't an animal who is cold blooded and warm blooded they are either cold blooded or warm blooded. ...