Can temples/widows peak be helped with a hairline lowering procedure?

Temples and sides can be addressed with a hair transplant procedure.  A hair transplant procedure can narrow your forehead.

Hairline lowering can be done surgically or through a hair transplant. Several issues to be noted with the surgical option.  The recovery time is longer and more painful, the scar may always be visible, and there may be a greater cost than hair transplant.  Many people may need a hair transplant to cover the scar of surgical procedure. Hair transplant can help with no scarring in front but some patients may need more than one procedure to achieve maximum density.

It is very amenable to hair transplantation if done properly. I prefer it over hairline advancement. Hair angles are very important to gain a natural appearance. 

The tip of your widow's peak is where your juvenile hairline was, sop if you lower your hairline to where it was when you were 10 years old, the widows peak would be buried in the lower hairline (see article in web reference below). Young children do not have widow's peaks, which appear only as the hairline is recedes. The temple peaks are easily restored in a hairline lower procedure in women or men.