In April, the weather in Glenrothes is typically warm. Average daily high temperature in April is about 11 degrees above zero. On average, Glenrothes has 13 rainy, 8 partly cloudy, 5 cloudy, and 4 sunny days in April. The rains are usually moderate. April as well as January, February, March, and May is considered the most uncomfortable time to visit Glenrothes.