January in Newton is the snowiest and the coldest month of the year. In January, the weather in Newton is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Newton has 13 sunny, 11 partly cloudy, 5 cloudy, and 2 snowy days in January. The snowfalls are usually light. January as well as February, June, July, and August is considered the most uncomfortable time to visit Newton.