Other facts from our historical weather data: Which is the warmest month in Reeth? July has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Reeth? The coldest month is January with an average maximum temperature of 7°C (45°F). Which is the wettest month in Reeth? December tops the wettest month list with 98mm (3.9 in) of rainfall. Which is the driest month in Reeth? May is the driest month with 73mm (2.9 in) of precipitation. Which is the sunniest month in Reeth? May is the sunniest month with an average of 182 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.