Last full trip (going North) I took was in 2018...how time flies....we left Ewe-stun TX circa April 10...arrived in Los Anchorage circa May 26 or so, late May in any case. We entered Canada from Montana and I seem to recall crossing the border circa May 17 -19 or so. Did not encounter snow on any of the main roads, had one snow flurry (turned into rain as soon as it hit something, no accumulation) around Whitehorse, no temps that were below freezing enough to notice (i.e. it may have toyed with 32 for a bit, never stayed that low).
Lakes in Northern BC, YT, and Alaska north of Los Anchorage were still frozen / snow covered.
...all as best as I can recall..