Climate of Northern Ireland

 Northern Ireland’s climate is temperate and maritime; most of its weather comes from the southwest in a series of low-pressure systems bringing the rain and clouds that often lend character to the landscape. Because Northern Ireland is near the central track of such lows, it often experiences high winds. In the north and on the east coast, particularly, severe westerly gales are common. Above the 800-foot (245-metre) level, distorted trees and windbreaks testify to the severity of the weather. Annual rainfall decreases from west to east, although the hills accentuate the amount to some 80 inches (2,000 mm) in parts of the west, and there is as little as 32.5 inches (825 mm) at Lough Neagh and the extreme southeast. A relatively dry spring gives way to a wet summer and a wetter winter. Daily conditions generally are highly changeable, but there are no extremes of heat and cold. The region is exposed to the ameliorating effects of the North Atlantic Current, a northeastward extension of the Gulf Stream. Average January temperatures vary from 38 °F (3.3 °C) on the north coast to 35 °F (1.7 °C) in the east; in July temperatures of 65 °F (18.3 °C) are common. In late spring and early summer the east has slightly lower temperatures accompanied by coastal fog. These mild and humid climatic conditions have, in sum, made Northern Ireland a green country in all seasons.