Other facts from our historical weather data: Which is the warmest month in Nethy Bridge? July has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Nethy Bridge? The coldest month is February with an average maximum temperature of 5°C (41°F). Which is the wettest month in Nethy Bridge? August tops the wettest month list with 102mm (4 in) of rainfall. Which is the driest month in Nethy Bridge? March is the driest month with 83mm (3.3 in) of precipitation. Which is the sunniest month in Nethy Bridge? 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.