It is recommended that salmon be fully cooked at medium which is an internal temperature of about 145 F to 147 F or 60 to 63°C (measure at the thickest part of the fish).But, salmon can be eaten medium-rare if you buy from a trusted source. The internal temperature for medium-rare should be about 122 to 127°F or 50 to 53°C (this is what I like to serve my salmon)