Other facts from our historical weather data: Which months have the greatest rainfall in Inis Mor? Most rainfall (rainy season) is seen in January, October, November and December. Which is the warmest month in Inis Mor? August has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Inis Mor? The coldest month is February with an average maximum temperature of 10°C (50°F). Which is the wettest month in Inis Mor? November tops the wettest month list with 184mm (7.2 in) of rainfall. Which is the driest month in Inis Mor? May is the driest month with 95mm (3.7 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.