The Brenne has a temperate maritime climate, for all it is 200km from the sea. The prevailing winds are from the west or south-west ie from the coast, bringing most of the rain and generally scooting along fairly smartly, with gusts regularly recorded of 70-100km/hour. Winds from the north or north-east are coming from Scandinavia or Russia and are cold.
(Note: Much of this information has been cribbed from 'Flore remarquarble du Parc naturel régional de la Brenne' by François Pinet. Any errors are the result of me either misunderstanding or mistranslating the French terminology.)