graphing years of server temperature data

Question

I have a couple of HP M5 servers that I've been collecting temperature reference data for a year now.

The problem I have is with graphing this with PHP.

I've tried half a dozen methods from Google chart to SWF charts and JS but all seem cumbersome due to the large amount of data.

How could I graph this data successfully and easily?<

At this time i am using a graph setup like this:

Answer 1

Gnuplot is a great tool for on-demand plotting.

Answer 2

I use http://oss.oetiker.ch/rrdtool/doc/rrdtool.en.html RRDTool to graph temperature and everything else going on in a server.