On 28 February 2013 achieved title of World Champion 2013. In the first series of the competition he showed the longest jump on 131.5 m and earned high marks for style, including the "20" from the Swiss judge. He was the leader after the first round. In the final series, like most of the top competitors he competed with reduced at the request of the coach – the nineteenth beam. Stoch jumped 130 m, again without providing any judicial note below "19" and won the gold medal with 6.1 points more than Peter Prevc, but about 6.7 from the third Anders Jacobsen. Immediately after the competition Stoch and Prevc were threatened with disqualification for image suits. This provision was to be introduced the day before, ultimately anonymous protest was rejected by the judges. Gold medal Stoch picked up a day later in Cavalese. He won the title of World Champion in Val di Fiemme – exactly ten years after winning the first title of World Champion by Adam Małysz. On 2 March 2013 Stoch took part in the team competition on the large hill, which was submitted to the fourth group of players. Before his first attempt Poland was classified in fifth place. Makes a stroke on the 134-meter and after the first round of Poland took fourth place, losing five points to third Germans. The second started at the request of head coach Łukasz Kruczek, with a reduction of two positions beams and reached 130 meters. Polish team, including Stoch, won there a bronze medal in team competition in squad: Kamil Stoch, Dawid Kubacki, Piotr Żyła and Maciej Kot. The primary outcome of the competition his team took fourth place, but after re-counting the scores because of Thomas Morgenstern, who noticed a mistake in points and at the request of the Germans, they finished in third place (Norway was in front of the Polish, but Bardal's jump was badly counted).