Other facts from our historical weather data: Which months have the greatest rainfall in Llwyngwril? Most rainfall (rainy season) is seen in November and December. Which is the warmest month in Llwyngwril? 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 Llwyngwril? The coldest month is February with an average maximum temperature of 9°C (48°F). Which is the wettest month in Llwyngwril? December tops the wettest month list with 163mm (6.4 in) of rainfall. Which is the driest month in Llwyngwril? April is the driest month with 88mm (3.5 in) of precipitation. Which is the sunniest month in Llwyngwril? May is the sunniest month with an average of 169 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.