January in Troon is the coldest month of the year. In January, the weather in Troon is typically cold. Average daily high temperature in January is about 6 degrees above zero. On average, Troon has 18 rainy, 5 cloudy, 5 partly cloudy, and 3 sunny days in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Troon.