Other facts from our historical weather data: Which months have the greatest rainfall in High Newton? Most rainfall (rainy season) is seen in January, October, November and December. Which is the warmest month in High Newton? 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 High Newton? The coldest month is February with an average maximum temperature of 7°C (45°F). Which is the wettest month in High Newton? December tops the wettest month list with 171mm (6.7 in) of rainfall. Which is the driest month in High Newton? April is the driest month with 90mm (3.5 in) of precipitation. Which is the sunniest month in High Newton? May is the sunniest month with an average of 217 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.