Other facts from our historical weather data: Which is the warmest month in Tain? July has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in Tain? The coldest month is December with an average maximum temperature of 8°C (46°F). Which is the wettest month in Tain? October tops the wettest month list with 89mm (3.5 in) of rainfall. Which is the driest month in Tain? April is the driest month with 65mm (2.6 in) of precipitation. Which is the sunniest month in Tain? May is the sunniest month with an average of 178 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.