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 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 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.
However he missed most of the 2012 season through a hip injury.
1997 Austrian Amateur Closed Championship European Tour wins (1) Challenge Tour wins (3) Alps Tour wins (1) DNP = Did not play CUT = missed the half-way cut "T" = tied Green background for wins. Yellow background for top-10. Amateur Eisenhower Trophy (representing Austria): 2000, 2002 Bonallack Trophy (representing Europe): 2002 Street Andrews Trophy (representing Continental Europe): 2002 Professional WGC-World Cup (representing Austria): 2004 Ponte Veccio Challenge: 2011.
1997 Austrian Amateur Closed Championship 2000 Austrian Amateur Closed Championship 2001 Austrian Amateur Closed Championship 2002 Slovak Amateur Open Championships, Austrian Amateur Closed Championship *Dual-ranking event with the Challenge Tour European Tour playoff record (0–1) *Dual-ranking event with the European Tour.