Wiegele was born in
Graz. He turned professional in 2003 when he joined the second tier
Challenge Tour. He enjoyed some success during his first season finishing fourth on the end of season rankings to graduate to the top level
European Tour for 2004. He almost won his first European Tour event he ever played, losing a playoff against
Marcus Fraser in the 2003
BMW Russian Open. He could not keep his European Tour card and had to go back to the Challenge Tour. He struggled for form during the next few seasons due to massive swing changes, before picking up his first big victory at the 2007
Lexus Open. He went on to be medalist at the
European Tour Qualifying School at the end of the season to regain his place at the top level. Having finished 142nd on the Order of Merit in 2008, Wiegele returned to the Challenge Tour in 2009. He picked up his second tournament victory on the Challenge Tour in 2010 at the
Kärnten Golf Open, before winning his first European Tour title at the
Saint-Omer Open two weeks later which gave him a one-year exemption on the main tour. He gained his Tour card for the 2012 season by finishing 83rd in the 2011 Race to Dubai, a season in which he finished tied for third in the
Barclays Scottish Open. Wiegele missed most of the 2012 season because of two hip surgeries, and lost his full playing rights on the European Tour after his 2013 season. Hip problems and poor form since has kept him outside the world top-1000 most of the time from 2013 to early 2017. In June 2017, he was a surprise winner of the
KPMG Trophy, his best performance since 2011. Because of his ongoing hip injury, he received a total hip replacement in early 2018. ==Amateur wins==