Below 35F! Thats almost half the year for me!
Anyway, I finished up the temperature hack shield this morning. I did make a small change to the schematic. To reduce the amount of resistors needed I put just one 560 ohm resistor before all of the resistors.
I also changed the code a tiny bit. I swapped some pins on the arduino to digital pot so it would be easier to wire up the shield.
Here is the finished board on the arduino.