Terracotta pots for cooling a terrarium?

[Kevinator]

Hey guys. I was wondering if terracotta pots would be an effective way for keeping the temperature of a terrarium down by say, five degrees? My house has an ac, but without my knowledge, our family registered for a program that would save us money but the ac can be turned on or off by the electric company to supply it to factories in the summer. Because of this, the house can get up to 86 degrees F at times. I have also observed that the terrarium absorbs heat through a greenhouse effect, raising the temperature by at most 3 degrees F. Would the overall temperature drop if enough clay pots are used? If not, then is there any other way of temporarily reducing the temperature of the enclosure at night? The plants should be fine as long as the night temperatures drop comparatively to the daytime temperature .