I am the proud owner of an Oregon Scientific WMR-918 weather station. I record the data from the station onto my PC, and capture the data in archival files. Early each morning I have a cron job generate all the plots on the linked pages, and upload them to my website.

The software is all written in perl, and runs on Linux. See my weather tools page for details.
 

Historical Weather Plots and Data

Temperatures for 2000 (from August)	Temperatures for 2001	Temperatures for 2002
Temperatures for 2003	Temperatures for 2004

Data Files

R Code for Plots