August in St Andrews is the rainiest month of the year. In August, the weather in St Andrews is typically warm. Average daily high temperature in August is about 16 degrees above zero. On average, St Andrews has 20 rainy, 5 sunny, 3 cloudy, and 3 partly cloudy days in August. The rains are usually moderate. August as well as January, February, June, and October is considered the most uncomfortable time to visit St Andrews.