December in Shreveport is the rainiest and the cloudiest month of the year. In December, the weather in Shreveport is typically warm. Average daily high temperature in December is about 12 degrees above zero. On average, Shreveport has 11 rainy, 9 sunny, 7 partly cloudy, and 4 cloudy days in December. The rains are usually heavy. December as well as January and August is considered the most uncomfortable time to visit Shreveport.