CBC reports that William and Kate are expected to arrive in Yukon's capital Whitehorse on that day, where they will be joined by Prime Minister Justin Trudeau and his wife Sophie, though the palace is yet to confirm any dates or details about the tour.
David Johnston, Governor General of Canada, will also be on hand to welcome the royals to the stunning region.
The email also revealed that events and activities will reportedly take place within "driving distance" from Whitehorse.
On Wednesday, Yukon government spokesperson Sarah Crane said that the details in the email are "unconfirmed and developing."
This will be William and Kate's first visit to the mountainous territory of Yukon, coinciding with Mr Trudeau's first visit to the region as prime minister. Last month the royals accepted the Canadian government's invitation to tour parts of the country.
Kensington Palace tweeted: "The Duke and Duchess of Cambridge will visit Canada this autumn at the invitation of the Canadian Government. TRH hold very happy memories from their last visit to Canada in 2011 – their first overseas tour as a married couple.
"The Duke and Duchess look forward to exploring more of Canada, from British Columbia to the territory of Yukon, when they return this autumn."
A spokesperson for the palace added: "They are really looking forward to seeing other parts of this beautiful country and having the opportunity to meet many more Canadians along the way."
This would be Charlotte's first tour abroad and royal watchers are no doubt eager to see more of the little girl. It would also mark the second tour for George, who famously accompanied his parents to Australia and New Zealand on their official visit in 2014 when he was just eight months old.