Climate differences between the northern French coast, the western Atlantic coast, and the Mediterranean coast are extreme. The climate in north-eastern France is continental, so the summer is relatively warm, while the winter is rather rainy and cold. In the west, there is a moderate sea climate. In the Mediterranean regions, it can be very hot in the summer months. The winter time is pleasantly mild, but there are intense rainfalls. From the Rhône river valley coming, the aggressive Mistral can occur rapidly in the in the Mediterranean region of France.