This comes straight from SFFaudio… they did great work on this. You can view their entire list of Weird Tales scans here, but I’ve singled out links to the issues containing Lovecraft’s stories.

View PDF scans of issues of Weird Tales containing Lovecraft’s stories and letters to the editor, below (click the links):

• Letter to the editor of Weird Tales, September 1923 – September 1923
• Letter to the editor of Weird Tales, October 1923 – October 1923
• Letter to the editor of Weird Tales, January 1924 – January 1924
• Letter to the editor of Weird Tales, March 1924 – March 1924
• Imprisoned With The Pharaohs – May/June/July 1924
• Hypnos – May/June/July 1924
• The Tomb – January 1926
• The Terrible Old Man – August 1926
• Yule Horror – December 1926
• The White Ship – March 1927
• Letter to the editor of Weird Tales, February 1928 – February 1928
• The Dunwich Horror – April 1929
• The Tree – August 1938
• Fungi From Yuggoth Part XIII: The Port – September 1946
• Fungi From Yuggoth Part X: The Pigeon-Flyers – January 1947
• Fungi From Yuggoth Part XXVI: The Familiars – January 1947
• The City – July 1950
• Hallowe’en In A Suburb – September 1952

Enjoy!