What temperature zone does the poinsettia live in?

Subtropical is the temperature zone in which poinsettia lives.

Specifically, the plant in question (Euphorbia pulcherrima) can be found growing natively in Mexico and parts of Central America. It favors drier, hotter, longer summers and milder, shorter, warmer winters. Its comfort zone in temperatures ranges settles between 60 °F/15.55 °C and 80 °F/26.66 °C although it can be grown as a houseplant or as a part-indoor, part-outdoor plant in temperate zones.