January in Lancaster is the snowiest, the windiest, and the coldest month of the year. In January, the weather in Lancaster is typically freezing. Average daily high temperature in January is about zero. On average, Lancaster has 9 cloudy, 8 partly cloudy, 7 snowy, 4 rainy, and 3 sunny days in January. The snowfalls are usually moderate. January as well as February, March, April, and October is considered the most uncomfortable time to visit Lancaster.