I found this Github Gist pretty useful. After exporting the xml file from wordpress admin account, you can call the wordpressxml2jekyll.rb like
ruby wordpressxml2jekyll.rb wordpress.xmlThen you should be able to find a folder named _posts under your current directory. I have to admit it’s not perfect and you’d be better off using wordpress plugins such as Jekyll Exporter. It would work if you have wordpress blog fully managed by you, but would fail in case you are using the free version on wordpress.com
Trust me, don’t even bother trying the method mentioned on jekyll’s website – it’s not going to work and the output markdown files are pretty much trash. pandoc didn’t work for me either.