December in Alloa is the windiest month of the year. In December, the weather in Alloa is typically cold. Average daily high temperature in December is about 5 degrees above zero. On average, Alloa has 19 rainy, 6 cloudy, 4 sunny, and 2 partly cloudy 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 Alloa.