Where abouts are you located? I'm in Olivebridge (right by the Ashohan Reservoir)
I did a similar experiment one year on a nuc in my basement, except I used a string of Dallas 1-wire sensors hooked to my serial port, recorded the temperature every 5 minutes and graphed it. I have been going to do it on a full hive outside, but it seems that I'm always in a rush in the fall and never get it set up in time.
Good luck with your endeavor.
edit - I missed the infra-red the first time, neat :shock: