A panoramic view of an upcoming thunderstorm on a habitable exomoon.

This earth-like moon orbits a jupiter-like host planet somewhere in the universe. The gas giant itself revolves in the habitable zone around a sun-like main sequence star. So to say a „warm” Jupiter.

Billions of years ago, the gas giant formed in the outer regions of this system, then moved in by gravitational perturbances to its present position, stable for the next couple of billions of years. This movement devastates and changed the whole system, by ejecting planets in the interstellar space or in the sun itself.

I am supposing a geologically very active moon with a „heavy climate”, because the near gas giant is affecting its moon with its gravitation much more than our moon is affecting the earth.

Big tides not only in the water but also in the atmosphere, so severe climatic events are common, but life is very adaptable.

Terragen 4 and Pixelmator