Question: how much weight can a woman gain in a month?
Answer: Based on all of this, here's how fast you can expect to build muscle on average: Average Natural MAN: between 0.25 and 0.5 pounds of muscle per week (or about 1-2 pounds of muscle gained per month). Average Natural WOMAN: between 0.12 – 0.25 pounds of muscle per week (or about 0.5-1 pound of muscle gained per month).