All I had to do was come up with a quick and dirty bash script to export the right information and mrtg does the rest. Here is the script:
#!/bin/bash
TEMP=`owread -F /10.8889C7000800/temperature`
echo $TEMP
echo $TEMP
echo "as long as I can remember"
echo "Basement Temperature Sensor"
And the output:
$ ./tempmrtg.sh
59
59
as long as I can remember
Basement Temperature Sensor
For the most part, you can graph just about anything with mrtg as long as your script outputs 4 things. In, Out, uptime, and a name. Since mrtg was designed mainly to be used with traffic monitoring, you need to specify input and output. But for something simple like temperature, those can both be the same number.
Yes it is 59 degrees in the basement. Whatever.