Weather patterns in Yoho are similar to adjacent parks, although the summer tourist season in Yoho is shorter than in the other national parks. Emerald Lake doesn’t become ice free until early June, and the road to Takakkaw Falls remains closed until mid-June. While July and August are the prime months to visit, September is also pleasant, both weather- and crowd-wise. Lake O’Hara doesn’t become snow free until early July, but the best time to visit is the last week of September, when the forests of larch have turned a brilliant gold color. Late spring and early fall are excellent times to visit Yoho National Park for two reasons: you’ll avoid the crowds, and you’ll save money. Spring (mid-Apr. to late June) is notable for long days of sunlight (in late June it stays light until after 10 p.m.) and a sense of optimism for the upcoming warm months. Fall (mid-Sept. to Nov.) can be delightful, especially September, with lingering warm temperatures and a noticeable decrease in crowds immediately after the long weekend (at the beginning of the month). While fall colors in general lack the intensity of those in the eastern provinces and New England, larch at Lake O’Hara turn a brilliant yellow through the last two weeks of September.
*closest weather station is Golden, on the west side of the park