Why does the climate determine the quality of wine?

Climate is the main reason that affects wine.

Climate is the predictable weather in a typical year, including temperature, rainfall, sunshine and other factors.

The best quality wine is made from grapes planted in an environment with sufficient climatic factors but not too many.

One example can explain everything.

Chablis in the north of Burgundy has only one Grand cru, and the wine produced here is the best among Chablis. It is because the cold area like Chablis in Burgundy, above 48 degrees north latitude, is the geographical boundary of producing calm wine, and this place designated as Grand cru is the place with the most sunshine in Chablis. High sunshine temperature and good grape maturity. This is why the climate affects the quality of wine.