January in Baltimore is the snowiest and the coldest month of the year. In January, the weather in Baltimore is typically cold. Average daily high temperature in January is about 4 degrees above zero. On average, Baltimore has 10 sunny, 10 partly cloudy, 5 rainy, 4 cloudy, and 2 snowy days in January. The rains are usually heavy. January as well as February, March, July, and December is considered the most uncomfortable time to visit Baltimore.