December in Clovis is the coldest month of the year. In December, the weather in Clovis is typically warm. Average daily high temperature in December is about 11 degrees above zero. On average, Clovis has 19 sunny, 8 partly cloudy, 2 cloudy, 1 rainy, and 1 snowy day in December. The rains are usually light. December as well as January, June, July, and August is considered the most uncomfortable time to visit Clovis.