August in Thomaston is the warmest month of the year. In August, the weather in Thomaston is typically warm. Average daily high temperature in August is about 20 degrees above zero. On average, Thomaston has 15 partly cloudy, 12 sunny, 3 rainy, and 1 cloudy day in August. The rains are usually light. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Thomaston.