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Northern Ireland

General Facts

Area: 13,360 km2 (5,158 sq miles)

Capital City: Belfast

Population: 1,876,695 (2017 estimate)

Official Languages: English

Boarding Countries: Republic of Ireland

Coastline: 539 km (334 miles)  

Currency: Pound Sterling (GBP)

Government: Constitutional Monarchy


The mean annual temperature at low altitudes in Northern Ireland varies from about 8.5 °C to 10.0 °C, with the higher values occurring around or near to the coasts. The mean annual temperature decreases by approximately 0.5 °C for each 100m increase in height. In winter, temperatures are influenced to a very large extent by those of the surface of the surrounding sea, which reach their lowest values in late February or early March. The January mean daily minimum temperatures vary from about 0.5 °C in the upland areas to about 2.5 °C on the coast. July is normally the warmest month in Northern Ireland, with mean daily maximum temperatures varying from about 17.5 °C in the upland areas and along the north coast to almost 20 °C in low lying areas south of Lough Neagh and in Fermanagh.

Five Largest Cities/Towns: 

1. Belfast (333,000)

2. Derry (85,016)

3. Lisburn (71,465)

4. Newtownabbey (62,056)

5. Bangor (58,388)

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