Taking the local weather in Bwlchtocyn into account can help you maximise your time at the pool during your trip. The hottest months are usually August and July, with an average temperature of 14°C, while the coldest months are February and January, with an average of 7°C. The rainiest months in Bwlchtocyn are December, November, October and January, with each month seeing an average of 180 mm of rainfall.