title_body: How does humidity affect roasting?
upvoted_answer: I believe heat and humidity play a key role in the role of energy transference in the roaster. I roast (professionally)in a very dry climate and find it easier (more forgiving) to roast in a climate that generally has a more humidity.
  
  Here is a link to a conversation about heating and humidity that hopefully will help answer your question.
  
  I think the 3rd answer is the most appropriate in its relation to heat transfer and "other" objects in a room (i.e. Coffee beans).
  
  How air humidity affects how much time is needed for heating the air?