Complex sentence: The temperature on the periphery of the cluster varies with the outside air temperature and in the winter cluster, the internal temperature may be as low as 20-22 ° C (68-71.6 ° F).
Split into simpler sentences: The temperature on the periphery of the cluster varies with the outside air temperature. In the winter cluster, the inside temperature is as low as 20-22 ° C (68-71.6 F).