Keep in mind that this is an 'average' and that exogenous events can greatly affect the normalized results.
Chart courtesy of friend Brian at ContraryInvestor. 
Gold Seasonality with Gold 2010 Daily Price Chart Overlay
“All governments suffer a recurring problem: power attracts pathological personalities. It is not that power corrupts but that it is magnetic to the corruptible. Such people have a tendency to become drunk on violence, a condition to which they are quickly addicted."
Frank Herbert, Chapterhouse Dune, March 1985
Keep in mind that this is an 'average' and that exogenous events can greatly affect the normalized results.
Chart courtesy of friend Brian at ContraryInvestor. 
Gold Seasonality with Gold 2010 Daily Price Chart Overlay