July weather forecast in Carnac

July in Carnac is the warmest month of the year. In July, the weather in Carnac is typically warm. Average daily high temperature in July is about 20 degrees above zero. On average, Carnac has 14 partly cloudy, 12 sunny, 3 rainy, and 2 cloudy days in July. The rains are usually light. July as well as June is considered the most comfortable time to visit Carnac.