In the Southern Interior, the number of birds per record is highest in April. In the Boreal Plains, a small movement is detectable at the end of August and the first week of September, and most birds have left that region by the end of September. In the Central Interior, Southern Interior Mountains, and Southern Interior there is an increase in numbers in the last 3 weeks of September, which may reflect the arrival of migrants from the north. Almost all Ruby-crowned Kinglets have left these regions of the province by the end of October. On the coast, autumn migrants move into the Georgia Depression during the last 2 weeks of September and the first week of October.
Numbers appear to be stable through the winter months.
In winter, the Ruby-crowned Kinglet is abundant in the Georgia Depression, and occasionally occurs on the coast as far north as the lower Skeena River valley. In the southern portions of the interior, there are scattered records from the Okanagan valley, from the Columbia valley north as far as Nakusp, and at Williams Lake and Riske Creek. The breeding distribution of the Ruby-crowned Kinglet is not well known, but the species probably breeds throughout its summer range in the province. All reports of nesting north of Prince George are of adults with fledglings. The highest numbers in summer occur in the Central Interior and Sub-Boreal Interior ecoprovinces.