Same as you a Herpstat ND.
I keep mine in the garage it holds temps pretty well. I insulated and sealed the holes I drilled. It heats up pretty fast after I open it up even when its cold outside. My garage might drop down into the low 60s, on a freezing night, the hot water heater keeps a decent ambient temp. I almost used a wine cooler but I didn't want to be cut short on space, lol. Oh well, a man can dream can't he.
Jeff