Sunspots Overview
Sunspots appear darker than the rest of the visible solar surface because they are cooler.  Most of the visible surface of our Sun has a temperature of about  5400 C, but in a large sunspot the temperature can drop to about 4000 C. They usually come in sizes between about 2500 km and about 50,000 km.  The temperature of the visible surface of Etoile has been calculated to be  approximately 3000 C. The larger sunspots there may have a temperature  of 2000 to 2500 C.  

Approximate temperature (for Sun): 
Light sections:  5400 C 
Dark sections:  4000 C