SHORT ANSWER: Moss requires moist conditions to grow, so it tends to flourish in autumn and winter, then die back during the summer.

What temperatures does moss grow in?

To photosynthesize, moss needs sunlight (not necessarily direct), moisture, and temperatures above about -5 degrees Celsius (20 Fahrenheit) simultaneously.

What temperatures can moss survive?

Mosses grow in winter weather… not just survive but actually thrive. Most plants exhibit growth patterns between 65-85 degrees F. In contrast, bryophytes can grow in sub-zero temperatures.