“I thought about that and am wondering if I put a fan blowing on it if that would counteract the humidity? There has to be a way to do this.”
Here in Florida you can drill down to the aquifer and get water at a nice 72 degrees to use. Evaporation cooling wont work except for a short time in winter.
You can also use two clay pots where the humidity is low enough. Works well enough to keep vegatables cool.
Your humidity is worse than mine in Texas and our winter weather is colder than yours, however, so far this winter, there hasn't been cold weather.
I'm going to make the clay pots refrigerator when pots come back in Lowes for spring planting. I will make that work somehow. If I don't try, it surely won't happen.