December in Monroe is the cloudiest month of the year. In December, the weather in Monroe is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Monroe has 10 cloudy, 9 rainy, 6 partly cloudy, 5 sunny, and 1 snowy day in December. The rains are usually heavy. December as well as February and March is considered the most uncomfortable time to visit Monroe.