Groningen-1 Threshold Days by Year (NLE00100499)

3 fixed thresholds counted per year at Groningen-1 (NLE00100499): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Groningen-1 Thresholds

Groningen-1: days with 10 mm (0.39 in) or more of precipitation in 180 years, most in 2023 with 38.
Groningen-1: days with 25 mm (0.98 in) or more of precipitation in 130 years, most in 1984 with 6.
Groningen-1: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1950 with 2.
3 fixed thresholds have at least one qualifying day at Groningen-1.

Days with 10 mm (0.39 in) or more of precipitation

180 years with a qualifying day

Days per year at Groningen-1 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 2023.

Days with 10 mm (0.39 in) or more of precipitation per year at Groningen-1
Year	Days	Decade average
1847	10	15.3
1848	16	15.3
1849	20	15.3
1850	20	14.1
1851	21	14.1
1852	24	14.1
1853	6	14.1
1854	8	14.1
1855	13	14.1
1856	11	14.1
1857	9	14.1
1858	13	14.1
1859	16	14.1
1860	16	14.3
1861	13	14.3
1862	11	14.3
1863	13	14.3
1864	8	14.3
1865	14	14.3
1866	20	14.3
1867	13	14.3
1868	16	14.3
1869	19	14.3
1870	16	14.4
1871	10	14.4
1872	14	14.4
1873	12	14.4
1874	14	14.4
1875	17	14.4
1876	18	14.4
1877	13	14.4
1878	20	14.4
1879	10	14.4
1880	19	16.8
1881	19	16.8
1882	22	16.8
1883	12	16.8
1884	13	16.8
1885	24	16.8
1886	22	16.8
1887	6	16.8
1888	14	16.8
1889	17	16.8
1890	17	18.4
1891	12	18.4
1892	19	18.4
1893	17	18.4
1894	23	18.4
1895	21	18.4
1896	17	18.4
1897	17	18.4
1898	24	18.4
1899	17	18.4
1900	17	16.3
1901	16	16.3
1902	13	16.3
1903	26	16.3
1904	14	16.3
1905	15	16.3
1906	18	16.3
1907	11	16.3
1908	14	16.3
1909	19	16.3
1910	19	17.1
1911	9	17.1
1912	17	17.1
1913	13	17.1
1914	24	17.1
1915	18	17.1
1916	19	17.1
1917	19	17.1
1918	19	17.1
1919	14	17.1
1920	18	14.7
1921	11	14.7
1922	12	14.7
1923	16	14.7
1924	12	14.7
1925	16	14.7
1926	19	14.7
1927	16	14.7
1928	14	14.7
1929	13	14.7
1930	19	19
1931	21	19
1932	19	19
1933	21	19
1934	17	19
1935	18	19
1936	17	19
1937	14	19
1938	20	19
1939	24	19
1940	26	17.9
1941	15	17.9
1942	15	17.9
1943	15	17.9
1944	17	17.9
1945	18	17.9
1946	23	17.9
1947	15	17.9
1948	19	17.9
1949	16	17.9
1950	26	21.1
1951	19	21.1
1952	22	21.1
1953	22	21.1
1954	25	21.1
1955	20	21.1
1956	27	21.1
1957	21	21.1
1958	16	21.1
1959	13	21.1
1960	24	20.8
1961	29	20.8
1962	14	20.8
1963	19	20.8
1964	14	20.8
1965	25	20.8
1966	21	20.8
1967	20	20.8
1968	24	20.8
1969	18	20.8
1970	25	20.3
1971	17	20.3
1972	28	20.3
1973	22	20.3
1974	20	20.3
1975	22	20.3
1976	14	20.3
1977	18	20.3
1978	16	20.3
1979	21	20.3
1980	25	22.2
1981	21	22.2
1982	18	22.2
1983	24	22.2
1984	25	22.2
1985	21	22.2
1986	24	22.2
1987	21	22.2
1988	27	22.2
1989	16	22.2
1990	27	23.3
1991	15	23.3
1992	25	23.3
1993	30	23.3
1994	26	23.3
1995	30	23.3
1996	15	23.3
1997	17	23.3
1998	27	23.3
1999	21	23.3
2000	19	23.2
2001	29	23.2
2002	32	23.2
2003	20	23.2
2004	27	23.2
2005	17	23.2
2006	15	23.2
2007	28	23.2
2008	23	23.2
2009	22	23.2
2010	24	21
2011	20	21
2012	25	21
2013	20	21
2014	18	21
2015	21	21
2016	18	21
2017	25	21
2018	17	21
2019	22	21
2020	23	23.1
2021	20	23.1
2022	27	23.1
2023	38	23.1
2024	24	23.1
2025	21	23.1
2026	9	23.1

For each year, a bar from the first to the last day at Groningen-1 meeting 10 mm (0.39 in).

First to last qualifying date each year at Groningen-1
Year	First date	Last date
1847	1847-02-11	1847-11-30
1848	1848-02-24	1848-10-09
1849	1849-05-07	1849-12-28
1850	1850-01-25	1850-11-26
1851	1851-02-07	1851-11-25
1852	1852-01-12	1852-12-08
1853	1853-01-16	1853-09-25
1854	1854-01-07	1854-12-17
1855	1855-05-31	1855-11-01
1856	1856-01-21	1856-11-13
1857	1857-01-03	1857-09-28
1858	1858-03-07	1858-10-28
1859	1859-03-11	1859-12-29
1860	1860-01-30	1860-12-10
1861	1861-01-26	1861-12-06
1862	1862-03-20	1862-12-09
1863	1863-01-08	1863-12-29
1864	1864-03-08	1864-11-26
1865	1865-01-13	1865-10-27
1866	1866-01-01	1866-12-15
1867	1867-01-15	1867-10-03
1868	1868-01-22	1868-12-26
1869	1869-02-12	1869-12-18
1870	1870-06-24	1870-12-18
1871	1871-05-26	1871-11-30
1872	1872-02-25	1872-12-15
1873	1873-02-23	1873-10-22
1874	1874-03-17	1874-12-08
1875	1875-01-18	1875-11-19
1876	1876-03-05	1876-12-01
1877	1877-01-08	1877-10-29
1878	1878-01-15	1878-11-27
1879	1879-05-14	1879-12-31
1880	1880-03-02	1880-12-22
1881	1881-03-05	1881-12-20
1882	1882-02-14	1882-11-23
1883	1883-01-27	1883-11-22
1884	1884-01-22	1884-10-25
1885	1885-01-10	1885-11-26
1886	1886-01-03	1886-12-26
1887	1887-05-03	1887-10-10
1888	1888-03-11	1888-11-19
1889	1889-04-30	1889-11-26
1890	1890-01-26	1890-11-23
1891	1891-01-23	1891-12-10
1892	1892-01-05	1892-12-03
1893	1893-02-09	1893-12-01
1894	1894-02-25	1894-12-14
1895	1895-03-27	1895-12-30
1896	1896-03-08	1896-12-28
1897	1897-03-12	1897-12-07
1898	1898-01-05	1898-12-29
1899	1899-01-12	1899-11-08
1900	1900-01-19	1900-12-09
1901	1901-02-24	1901-12-24
1902	1902-04-05	1902-11-12
1903	1903-01-05	1903-11-25
1904	1904-01-08	1904-12-06
1905	1905-03-18	1905-11-26
1906	1906-01-06	1906-11-08
1907	1907-01-11	1907-12-13
1908	1908-01-07	1908-11-20
1909	1909-01-14	1909-12-22
1910	1910-01-24	1910-12-16
1911	1911-01-09	1911-11-06
1912	1912-02-12	1912-12-25
1913	1913-02-01	1913-12-26
1914	1914-03-08	1914-12-28
1915	1915-01-10	1915-12-24
1916	1916-01-02	1916-12-29
1917	1917-03-19	1917-12-25
1918	1918-01-11	1918-12-29
1919	1919-01-14	1919-12-21
1920	1920-01-10	1920-12-31
1921	1921-01-01	1921-12-30
1922	1922-01-01	1922-09-17
1923	1923-02-08	1923-12-20
1924	1924-03-02	1924-12-27
1925	1925-02-05	1925-12-22
1926	1926-01-01	1926-12-20
1927	1927-02-27	1927-12-25
1928	1928-01-07	1928-12-24
1929	1929-04-01	1929-12-11
1930	1930-04-16	1930-11-15
1931	1931-01-16	1931-12-29
1932	1932-01-02	1932-10-23
1933	1933-02-01	1933-10-31
1934	1934-01-14	1934-12-02
1935	1935-02-05	1935-12-22
1936	1936-02-15	1936-12-01
1937	1937-01-01	1937-11-19
1938	1938-01-26	1938-11-21
1939	1939-01-01	1939-11-29
1940	1940-06-12	1940-12-30
1941	1941-02-27	1941-12-14
1942	1942-03-31	1942-12-29
1943	1943-01-01	1943-12-30
1944	1944-02-09	1944-12-03
1945	1945-01-21	1945-12-28
1946	1946-01-11	1946-11-03
1947	1947-02-28	1947-12-27
1948	1948-01-07	1948-09-06
1949	1949-02-28	1949-12-05
1950	1950-01-05	1950-12-10
1951	1951-01-05	1951-12-10
1952	1952-01-11	1952-12-16
1953	1953-01-31	1953-09-22
1954	1954-01-13	1954-12-25
1955	1955-01-10	1955-12-26
1956	1956-01-01	1956-12-11
1957	1957-01-31	1957-12-31
1958	1958-01-06	1958-10-31
1959	1959-01-01	1959-12-25
1960	1960-01-25	1960-12-03
1961	1961-01-02	1961-12-31
1962	1962-01-20	1962-12-15
1963	1963-03-11	1963-11-19
1964	1964-03-19	1964-12-13
1965	1965-01-16	1965-12-31
1966	1966-02-08	1966-12-31
1967	1967-02-27	1967-12-30
1968	1968-05-04	1968-11-03
1969	1969-03-13	1969-12-02
1970	1970-01-25	1970-11-02
1971	1971-01-23	1971-12-22
1972	1972-01-20	1972-11-15
1973	1973-02-08	1973-12-07
1974	1974-01-07	1974-12-25
1975	1975-01-06	1975-12-31
1976	1976-01-01	1976-12-11
1977	1977-01-09	1977-12-29
1978	1978-01-02	1978-12-28
1979	1979-02-01	1979-12-28
1980	1980-03-12	1980-12-31
1981	1981-01-02	1981-12-03
1982	1982-01-05	1982-12-20
1983	1983-01-03	1983-12-08
1984	1984-01-01	1984-12-31
1985	1985-01-29	1985-12-17
1986	1986-01-02	1986-12-30
1987	1987-01-01	1987-12-29
1988	1988-01-05	1988-12-18
1989	1989-03-07	1989-12-20
1990	1990-01-25	1990-12-28
1991	1991-04-18	1991-12-17
1992	1992-01-05	1992-12-11
1993	1993-01-10	1993-12-30
1994	1994-01-12	1994-12-28
1995	1995-01-01	1995-12-22
1996	1996-02-12	1996-12-18
1997	1997-02-12	1997-12-11
1998	1998-01-03	1998-12-25
1999	1999-01-26	1999-12-24
2000	2000-01-03	2000-12-11
2001	2001-01-05	2001-12-27
2002	2002-01-20	2002-12-29
2003	2003-01-01	2003-12-28
2004	2004-01-31	2004-12-18
2005	2005-01-17	2005-10-24
2006	2006-03-25	2006-12-07
2007	2007-01-10	2007-12-06
2008	2008-01-10	2008-12-09
2009	2009-02-09	2009-12-24
2010	2010-02-02	2010-12-16
2011	2011-02-14	2011-12-29
2012	2012-01-01	2012-12-31
2013	2013-01-29	2013-12-24
2014	2014-01-06	2014-12-23
2015	2015-01-08	2015-12-12
2016	2016-01-07	2016-12-10
2017	2017-01-12	2017-12-31
2018	2018-01-02	2018-12-21
2019	2019-01-25	2019-11-03
2020	2020-01-13	2020-12-27
2021	2021-01-11	2021-10-31
2022	2022-01-01	2022-12-31
2023	2023-01-03	2023-12-31
2024	2024-01-01	2024-12-18
2025	2025-01-01	2025-11-18
2026	2026-02-21	2026-06-27

Every Fixed Threshold

Fixed thresholds at Groningen-1
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	180	38	2023	9
25 mm (0.98 in): Days with 25 mm or more rain	130	6	1984	1
50 mm (1.97 in): Days with 50 mm or more rain	10	2	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1847.

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Data for Groningen-1 threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Groningen-1 Threshold Days by Year (NLE00100499)

Key Facts for Groningen-1 Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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