Other facts from our historical weather data: Which is the warmest month in Invermoriston? 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 Invermoriston? The coldest month is February with an average maximum temperature of 6°C (43°F). Which is the wettest month in Invermoriston? January tops the wettest month list with 151mm (5.9 in) of rainfall. Which is the driest month in Invermoriston? April is the driest month with 91mm (3.6 in) of precipitation. Which is the sunniest month in Invermoriston? 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.