January in Preston is the rainiest, the windiest, and the coldest month of the year. In January, the weather in Preston is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Preston has 25 rainy, 4 sunny, and 2 cloudy days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Preston.