Chipping Sparrows are very rare in winter. There are hundreds of Tree Sparrows for every Chipping Sparrow that overwinters, and most winter chippers are found at bird feeders. Only 11 Chipping Sparrows have been reported to eBird in Ontario this winter.
Compare American Tree Sparrow, Swamp Sparrow, White-throated Sparrows and particularly first-year White-crowned Sparrows, all of which are far more common in winter.