I have written on the Hugo static site generator here. Now I have written a migration program in the Go programming language to convert from WordPress export format to Hugo format. This program wp2hugo.go is in GitHub. It can be freely downloaded and does not need any further dependencies, except, of course, Go. The Go software is in Arch Linux or Ubuntu.
To convert a blog from WordPress you have to create an export file.
If the blog is not too voluminous one downloads a single XML-file which contains all posts and pages. If the blog in question is larger then you will receive an e-mail from WordPress.com that you can download a ZIP which contains two or more XML files in them. If you have such a ZIP-file, then unpack it, for example by using p7zip. Then run
go run wp2hugo.go XML1 XML2 ...