Other facts from our historical weather data: Which is the warmest month in Alyth? 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 Alyth? The coldest month is December with an average maximum temperature of 7°C (45°F). Which is the wettest month in Alyth? October tops the wettest month list with 106mm (4.2 in) of rainfall. Which is the driest month in Alyth? April is the driest month with 74mm (2.9 in) of precipitation. Which is the sunniest month in Alyth? 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.