That code you shared is very helpful. 
In maintaining the index I will need to have some sort of increment counter that advances
the "index value" by one each time another temp value is sent into the array?
So:
temp1 goes into array[0]
increment index value to 1 (starts with 0]
(20 mins later) temp2 goes into array(1]
increment index to 2
(15 more mins) temp3 goes into array[2]
increment index to 3
and so on and so on...
when index value gets to "maxCycleCount" revert index back to "0"....
rinse and repeat... ???