What is a reasonable weight loss goal for the summer?

Anonymous
I am 5'6'' and I weigh 160lbs. What is a good weight for me to get down to? My doctor recommended I work on losing some weight this summer but didn't give me an acceptable range. Is going from 160 to 130 unreasonable? If so what is reasonable?
Updates
+1 y
Okay thanks to everyone who responded... I've decided to try for 10-15lbs range for my weight-loss goal for the summer... Which is three months :) Then continue to try to lose weight at a lesser rate until I can get down to 130. My reason for wanting to lose weight was to help with my scoliosis. My doctor said losing weight would help a little bit. Thank you guys so much! You were very helpful. I never knew that you shouldn't try to lose more than 2lbs a week(:
What is a reasonable weight loss goal for the summer?
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