December in Keokuk is the windiest month of the year. In December, the weather in Keokuk is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Keokuk has 11 cloudy, 7 sunny, 7 partly cloudy, 3 rainy, and 3 snowy days in December. The rains are usually moderate. December as well as January, February, March, and April is considered the most uncomfortable time to visit Keokuk.