December weather forecast in Riverdale

In December, the weather in Riverdale is typically warm. Average daily high temperature in December is about 12 degrees above zero. On average, Riverdale has 9 rainy, 9 sunny, 9 partly cloudy, and 4 cloudy days in December. The rains are usually moderate. December as well as January, February, March, and July is considered the most uncomfortable time to visit Riverdale.