December in Eskilstuna is the windiest month of the year. In December, the weather in Eskilstuna is typically freezing. Average daily high temperature in December is about zero. On average, Eskilstuna has 11 rainy, 10 cloudy, 4 sunny, 3 snowy, and 3 partly cloudy days in December. The rains are usually light. December as well as March, April, August, and October is considered the most uncomfortable time to visit Eskilstuna.