To generalise the weather we would just say it was unpredictable. It is not uncommon to hear people mention that you can experience 4 seasons in one day. But don’t let that put you off as we would contest that there is not such thing as bad weather just bad equipment.
The dominant influence on Ireland’s climate is the Atlantic Ocean. Consequently, Ireland does not suffer from the extremes of temperature experienced by many other countries at similar latitude. The warm North Atlantic Drift has a marked influence on sea temperatures. This maritime influence is strongest near the Atlantic coasts and decreases with distance inland. The hills and mountains, many of which are near the coasts, provide shelter from strong winds and from the direct oceanic influence. Winters tend to be cool and windy, while summers, when the depression track is further north and depressions less deep, are mostly mild and less windy.
To find more details about the Irish weather please visit: http://www.met.ie/