July weather forecast in Littleton

July in Littleton is the rainiest and the warmest month of the year. In July, the weather in Littleton is typically warm. Average daily high temperature in July is about 26 degrees above zero. On average, Littleton has 17 rainy, 12 sunny, and 2 partly cloudy days in July. The rains are usually heavy. July as well as January, February, May, and June is considered the most uncomfortable time to visit Littleton.