New to the cold...Lipo Storage Safe Temperatures???

[Desert Rc]

So new to Utah and looking for best storage option in the cold. Dont really want as many lipos as I have on the inside. So I have a ammo box that stays out in the garage. My garage probably drops sometimes down to 30 degrees. Is this a safe temp for lipo storage??

I have probably 30 Lipos from 2s to 6s in this box.... is this just a fireball waiting to happen. All have adequate charge.