Other facts from our historical weather data: Which is the warmest month in Wooler? 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 Wooler? The coldest month is January with an average maximum temperature of 8°C (46°F). Which is the wettest month in Wooler? August tops the wettest month list with 83mm (3.3 in) of rainfall. Which is the driest month in Wooler? March is the driest month with 57mm (2.2 in) of precipitation. Which is the sunniest month in Wooler? May is the sunniest month with an average of 183 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.