Warm gulf flow

Why is it almost always nice weather in the Vendée?

This is mainly caused by the warm gulf flow, which arises in the Caribbean area, then crosses the Atlantic ocean and arrives in Europe in the Bay of Biscay, then it goes north and the Vendée is one of the first regions where it passes. This warm gulf flow works as a type of buffer against the bad weather. Furthermore the strong wind ensures that when it rains, it is only for a short period of time.

How much is many sun hours in the Vendée?

In the Netherlands the highest number of sun hours is approximately 1600 hours per year. The Vendée has an average above the 2300 hours per year. 

The average total annual sunshine in the United Kingdom is 1339.7 hours, which is just under 30% of the maximum possible.