In January/February 2013 during the Junior World Championship in Obertilliach, Austria, Thingnes Bø won the silver medal in sprint, gold in the 12.5 km pursuit, and gold in the 7.5 km relay.
Thingnes Bø got his first World Cup win on 14 December 2013 in the sprint and his second the day after with a win in the pursuit. He won three more World Cup races in Kontiolahti, two sprints and one pursuit.