I've got two weather stations that are ~ 5 feet above the ground. They both briefly got to 32 this morning. I've also got one that is 6 inches off the ground. Usually it is my coldest reading (..closer to the ground); but it never got lower than 36. So in this case, the higher up the lower the temp.32.7 this morning but I relocated my sensor earlier this year, it's not down the hill and it's 9 ft off the ground.... I have a wireless sensor in our barn that is slightly down that hill, it read 32 (it's on the inside) so I think down the little hill in the back of our property might have touched freezing briefly. Not official and very isolated of course but a nice cold crisp morning