Irish weather and climate is influenced most by the Atlantic Ocean. As a result, it doesn’t have the extreme temperatures that other countries at similar latitude would have. The average temperature is a mild 50°F.
A major warm ocean current called the North Atlantic Drift keeps sea temperatures mild too. Hills and mountains, mainly around the coast, shelter the rest of the island from strong winds coming off the ocean.
So while the weather can be changeable – it’s rarely extreme.