Other facts from our historical weather data: Which is the warmest month in St Andrews? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in St Andrews? The coldest month is February with an average maximum temperature of 8°C (46°F). Which is the wettest month in St Andrews? October tops the wettest month list with 91mm (3.6 in) of rainfall. Which is the driest month in St Andrews? April is the driest month with 58mm (2.3 in) of precipitation. Which is the sunniest month in St Andrews? May is the sunniest month with an average of 193 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.