1 a region reputed to have a relatively moderate climate (often used facetiously).
1897  This is a truthful pen-picture of a mid-January day in the now far-famed "banana belt" country. . . .
1958  We called back bantering remarks about the softness of his summer's work in the "banana belt."
1965  The weather office said that the Arctic temperatures and snow that changed Canada's winter banana belt [south-western B.C.] to one of its unhappiest regions are moving inland.
2North the more populated, southerly regions of Canada; outside (def. 1).