In March, the weather in Thomaston is typically cold. Average daily high temperature in March is about 2 degrees above zero. On average, Thomaston has 11 rainy, 7 sunny, 7 partly cloudy, 5 cloudy, and 1 snowy day in March. The rains are usually moderate. March as well as April, May, and December is considered the most uncomfortable time to visit Thomaston.