It has nothing to do with Juno Beach. Altho that would certainly be a more than worthy reason..
The awards began in 1970, when organizers Stan Klees and Walt Grealis, who published RPM, a weekly trade publication, held the Gold Leaf Awards in the St. Lawrence Hall in Toronto.
A year later, the event changed its name to the Juno Awards in honour of Pierre Juneau, the then head of the CRTC, which had implemented the Canadian Content Regulations in 1971. (CanCon)
The Junos remained exclusively an industry event for the next few years, but in 1975, they assumed a much higher profile when they were telecast for the first time and the Canadian Academy of Recording Arts and Sciences (CARAS) was established to handle the event, working with all segments of the music industry in Canada.
Now the Juno Awards are traveling to different Canadian cities: St. John's, Ottawa - Gatineau, Edmonton, Winnipeg, Halifax, and Saskatoon, thus establishing its claim as a fully coast-to-coast event.
JUNO website:
http://www.junoawards.ca/