How hot do red giants get? How does this compare to our sun?
Red giant stars have a surface temperature between 3,000 and 5,000K.
The colour of a star depends on its surface temperature. Red giant stars are so massive that their surface temperature is relatively low. Typically red giant stars have surface temperatures of 3,000K - 5,000K.
In contrast the surface temperature of the Sun is almost 6,000K.
The cores of stars are much hotter. The Sun's core is about 14,000,000K.