Other facts from our historical weather data: Which is the warmest month in Insh? 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 Insh? The coldest month is February with an average maximum temperature of 5°C (41°F). Which is the wettest month in Insh? January tops the wettest month list with 124mm (4.9 in) of rainfall. Which is the driest month in Insh? April is the driest month with 88mm (3.5 in) of precipitation. Which is the sunniest month in Insh? 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.