Other facts from our historical weather data: Which months have the greatest rainfall in Castle Bruce? Most rainfall (rainy season) is seen in September, October and November. Which is the warmest month in Castle Bruce? September has an average maximum temperature of 29°C (84°F) and is the warmest month of the year. Which is the coldest month in Castle Bruce? The coldest month is February with an average maximum temperature of 26°C (79°F). Which is the wettest month in Castle Bruce? October tops the wettest month list with 162mm (6.4 in) of rainfall. Which is the driest month in Castle Bruce? March is the driest month with 46mm (1.8 in) of precipitation. Which is the sunniest month in Castle Bruce? April is the sunniest month with an average of 245 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.