You can use the WXDailyHistory.php script (see
https://github.com/ktrue/WU-History ) to fetch/cache the JSON and return what the old WXDailyHistory.asp page on the (defunct) wunderground site.
Note that Day, Month, and Year queries are supported, but not the 7-Day/Week or Custom formats. For Yearly queries, you should pre-load the monthly cache files (see the README.md on the github page for how to do that).
Hope this helps...