Yes, but you always want to be warmed up before you stretch.  Sometimes I have athletes do a 10 minutes stretching routine after a hot shower or bath.  This is what we call a passive warm-up.  Or take your dog for a 10 minute walk or jog to warm-up and come back in for stretching.  A good yoga DVD or Michele Assaf’s Active Isolated Flexibility program are ideal if you want something more structured.