March in Hamilton is the coldest month of the year. In March, the weather in Hamilton is typically warm. Average daily high temperature in March is about 18 degrees above zero. On average, Hamilton has 13 rainy, 9 partly cloudy, 8 sunny, and 1 cloudy day in March. The rains are usually moderate. March as well as January, February, August, and September is considered the most uncomfortable time to visit Hamilton.