Other facts from our historical weather data: Which is the warmest month in Gatehouse of Fleet? July has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Gatehouse of Fleet? The coldest month is February with an average maximum temperature of 8°C (46°F). Which is the wettest month in Gatehouse of Fleet? October tops the wettest month list with 151mm (5.9 in) of rainfall. Which is the driest month in Gatehouse of Fleet? May is the driest month with 86mm (3.4 in) of precipitation. 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.