225°F is the optimal temperature for smoking a whole chicken for the first three-quarters of the smoking period. While you might be tempted to go lower at 200°F, sticking to 225°F ensures that the collagen and connective tissues break down more effectively, resulting in a tender and juicy texture every time. After your chicken reaches an internal temperature of 135 to 140°F measured in the breast or thigh, crank up the heat to 275°F for the last of its cooking to pull off perfect skin every time.