If not done right concrete will crack anywhere.
We're in the snow belt, our average temp last February was 6F - it gets cold here.
The concrete in one garage, which we did not build, is cracked in many places. The concrete in our big garage, which we did build, isn't. We built it in 2001, so I'm thinking if it was going to crack it probably would have by now.
The key is ground preparation, plenty of reinforcement, and relief cuts.
As you can see, we used rebar, mesh, and fiber reinforced concrete. You only have one chance to do it right the first time, skimping on the prep work is wasting foolish $$$.
Here is the before and where our MH now lives;
