Other facts from our historical weather data: Which is the warmest month in Gairlochy? July has an average maximum temperature of 17°C (63°F) and is the warmest month of the year. Which is the coldest month in Gairlochy? The coldest month is February with an average maximum temperature of 6°C (43°F). Which is the wettest month in Gairlochy? January tops the wettest month list with 223mm (8.8 in) of rainfall. Which is the driest month in Gairlochy? April is the driest month with 119mm (4.7 in) of precipitation. Which is the sunniest month in Gairlochy? May is the sunniest month with an average of 189 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.