Name: Water indicators for Northern Ireland
Creator: Hydrionis

Headline indicators

Annual precipitation

1,106 mm

2025

Where this number comes from

Spatially aggregatedHigh confidence2025

Source: Met Office — HadUK-Grid gridded climate observations, HadUK-Grid areal series, Rainfall, Northern Ireland, annual. Licence: Open — attribution required (attribution required).

Method: Met Office published area-average total precipitation, from the HadUK-Grid 1 km gridded analysis of the national rain gauge network. Gauge density is far lower in the nineteenth century than today, and mountain precipitation is systematically under-measured, so early values carry greater uncertainty than recent ones.

Retrieved 1 October 2026.

Rainfall

Annual rainfall — Northern Ireland

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
European drought	Drought declaration	2022-05-01 – 2022-10-31	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Hurricane Katrina water and sanitation collapse — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	Northern Ireland (mm)
1836	776
1837	688
1838	822
1839	957
1840	963
1841	984
1842	1,079
1843	1,098
1844	911
1845	1,109
1846	1,065
1847	938
1848	1,137
1849	1,156
1850	1,094
1851	983
1852	1,268
1853	913
1854	916
1855	803
1856	800
1857	844
1858	884
1859	900
1860	1,041
1861	1,088
1862	1,115
1863	1,053
1864	877
1865	1,016
1866	1,111
1867	1,081
1868	1,002
1869	1,004
1870	954
1871	980
1872	1,418
1873	953
1874	999
1875	1,043
1876	1,195
1877	1,315
1878	1,024
1879	1,039
1880	958
1881	1,053
1882	1,230
1883	1,149
1884	1,084
1885	890
1886	1,126
1887	786
1888	1,032
1889	1,042
1890	1,032
1891	1,016
1892	1,044
1893	927
1894	1,068
1895	983
1896	1,076
1897	1,180
1898	1,046
1899	1,115
1900	1,226
1901	1,069
1902	1,014
1903	1,313
1904	1,048
1905	966
1906	1,075
1907	1,107
1908	1,080
1909	1,021
1910	1,128
1911	937
1912	1,217
1913	1,044
1914	1,040
1915	996
1916	1,153
1917	1,132
1918	1,145
1919	992
1920	1,177
1921	951
1922	1,007
1923	1,249
1924	1,227
1925	1,065
1926	1,079
1927	1,074
1928	1,343
1929	1,099
1930	1,171
1931	1,169
1932	1,024
1933	788
1934	1,114
1935	1,047
1936	1,133
1937	1,044
1938	1,205
1939	1,037
1940	1,157
1941	963
1942	1,182
1943	1,102
1944	1,138
1945	1,030
1946	1,137
1947	1,100
1948	1,165
1949	1,035
1950	1,249
1951	1,096
1952	953
1953	856
1954	1,303
1955	970
1956	1,038
1957	1,112
1958	1,194
1959	964
1960	1,200
1961	1,102
1962	1,024
1963	1,084
1964	999
1965	1,166
1966	1,266
1967	1,201
1968	1,078
1969	994
1970	1,141
1971	899
1972	1,036
1973	961
1974	1,119
1975	841
1976	1,045
1977	1,074
1978	1,116
1979	1,156
1980	1,176
1981	1,225
1982	1,167
1983	962
1984	1,068
1985	1,134
1986	1,199
1987	983
1988	1,242
1989	990
1990	1,268
1991	1,035
1992	1,178
1993	1,156
1994	1,159
1995	1,071
1996	1,081
1997	1,045
1998	1,266
1999	1,255
2000	1,235
2001	898
2002	1,411
2003	937
2004	1,090
2005	1,074
2006	1,157
2007	1,091
2008	1,276
2009	1,256
2010	1,041
2011	1,262
2012	1,178
2013	1,134
2014	1,288
2015	1,318
2016	1,050
2017	1,146
2018	1,078
2019	1,209
2020	1,319
2021	1,055
2022	1,105
2023	1,375
2024	1,032
2025	1,106

Use this data

Machine-readable JSON /api/v1/observations/by-subject/uk-northern-ireland.json
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No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Attribution you are required to give

These are conditions of the licences the underlying data is published under. They are obligations to the publishers, not to Hydrionis, and they apply to you directly whether or not you mention Hydrionis at all.

Contains public sector information licensed under the Open Government Licence v3.0.

Met Office — Open Government Licence v3.0 (licence text)

Suggested citation for Hydrionis

Hydrionis (2026), Water data for Northern Ireland, accessed 2026-10-05, hydrionis.com/places/northern-ireland/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Northern Ireland record changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

Hydrionis works to make data accurate, traceable and internally consistent through source validation, automated checks and documented methodology. Errors can still occur in original source data or in Hydrionis processing. For critical decisions, review the cited original source, the methodology and the known limitations. See accuracy and corrections.

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