December in Monroe is the cloudiest month of the year. In December, the weather in Monroe is typically warm. Average daily high temperature in December is about 12 degrees above zero. On average, Monroe has 10 rainy, 8 sunny, 7 partly cloudy, and 6 cloudy days in December. The rains are usually heavy. December as well as January, February, July, and August is considered the most uncomfortable time to visit Monroe.