IN Ok. We go from the 100's in the summer to the 20's and 30's in the winter. We try to avoid the most extreme weather where we can. As the boat does have A/C heat is a less signigicant problem other the limiting out outdoor activities. If I have ice or snow, I willl close the boat down as the deck become unsave at that point. Tornados is not a problem as the fire mashal states that the sub is the safest place around. Not much chance of a tornado lifting a 300 foot long piece of steal.....