Subject: Does heat and/ or humidity affect the rate of hair growth?

Some people contend that their hair grows faster during the summer. Is 
this true, and if so, is the increased growth rate caused by the higher 
temperatures and / or humidity experenced during the summer? A dentist 
contends that his facial hair grows faster under his surgical mask. A hair 
stylist contends his clients' hair grows faster in the summer requiring 
more frequent visits. Has any research been done on hair growth and heat / 
moisture?

Re: Does heat and/ or humidity affect the rate of hair growth?