<Tr> <Td_colspan="14"> Source #1: Met Éireann </Td> </Tr> <Tr> <Td_colspan="14"> Source #2: European Climate Assessment & Dataset, </Td> </Tr> <P> Rainfall is the most common form of precipitation on the island, and is extremely common throughout Ireland, although some parts of the west coast receive over four times as much rain as the east coast . Rainfall in Ireland normally comes from Atlantic frontal systems which travel northeast over the island, bringing cloud and rain . Most of the eastern half of the country has between 750 and 1,000 mm (29.5 and 39.4 in) of rainfall in the year . Rainfall in the west generally averages between 1,000 and 1,250 mm (39.4 and 49.2 in). In many mountainous districts rainfall exceeds 3,000 mm (118.1 in) per year . The wettest months almost everywhere are December and January . April is the driest month generally, but in many southern parts June is the driest . </P> <P> The average number of "wet days" (days with more than 1 mm (0.039 in) of rain) ranges from about 151 days a year along the east and southeast coasts, to about 225 days a year in parts of the west . </P>

When does it rain the most in ireland