Boskoop Threshold Days by Year

4 fixed thresholds counted per year at Boskoop (NLE00109008): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boskoop Thresholds

Boskoop: days with 10 mm (0.39 in) or more of precipitation in 95 years, most in 2023 with 42.
Boskoop: days with 25 mm (0.98 in) or more of precipitation in 85 years, most in 2013 with 7.
Boskoop: days with 50 mm (1.97 in) or more of precipitation in 12 years, most in 1998 with 2.
Boskoop: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1951 with 1.
4 fixed thresholds have at least one qualifying day at Boskoop.

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

95 years with a qualifying day

Days per year at Boskoop with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 42 in 2023.

Days with 10 mm (0.39 in) or more of precipitation per year at Boskoop
Year	Days	Decade average
1932	24	20.5
1933	16	20.5
1934	15	20.5
1935	27	20.5
1936	20	20.5
1937	19	20.5
1938	14	20.5
1939	29	20.5
1940	24	18.9
1941	22	18.9
1942	17	18.9
1943	16	18.9
1944	20	18.9
1945	16	18.9
1946	21	18.9
1947	16	18.9
1948	18	18.9
1949	19	18.9
1950	25	20.3
1951	23	20.3
1952	18	20.3
1953	17	20.3
1954	19	20.3
1955	21	20.3
1956	18	20.3
1957	31	20.3
1958	18	20.3
1959	13	20.3
1960	29	26.4
1961	29	26.4
1962	21	26.4
1963	26	26.4
1964	27	26.4
1965	33	26.4
1966	32	26.4
1967	26	26.4
1968	19	26.4
1969	22	26.4
1970	21	18.4
1971	14	18.4
1972	10	18.4
1973	19	18.4
1974	30	18.4
1975	20	18.4
1976	11	18.4
1977	17	18.4
1978	19	18.4
1979	23	18.4
1980	22	24.7
1981	28	24.7
1982	14	24.7
1983	28	24.7
1984	28	24.7
1985	22	24.7
1986	26	24.7
1987	31	24.7
1988	30	24.7
1989	18	24.7
1990	25	27.3
1991	23	27.3
1992	32	27.3
1993	32	27.3
1994	35	27.3
1995	20	27.3
1996	18	27.3
1997	17	27.3
1998	32	27.3
1999	39	27.3
2000	33	27.2
2001	35	27.2
2002	26	27.2
2003	23	27.2
2004	23	27.2
2005	23	27.2
2006	29	27.2
2007	30	27.2
2008	26	27.2
2009	24	27.2
2010	29	26.6
2011	29	26.6
2012	26	26.6
2013	27	26.6
2014	22	26.6
2015	28	26.6
2016	25	26.6
2017	27	26.6
2018	19	26.6
2019	34	26.6
2020	29	25.6
2021	20	25.6
2022	28	25.6
2023	42	25.6
2024	35	25.6
2025	19	25.6
2026	6	25.6

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

First to last qualifying date each year at Boskoop
Year	First date	Last date
1932	1932-01-06	1932-11-08
1933	1933-02-01	1933-11-02
1934	1934-04-17	1934-12-02
1935	1935-02-03	1935-12-16
1936	1936-03-29	1936-12-06
1937	1937-01-01	1937-11-20
1938	1938-01-12	1938-12-03
1939	1939-01-01	1939-12-28
1940	1940-01-17	1940-12-30
1941	1941-01-18	1941-12-26
1942	1942-01-24	1942-12-05
1943	1943-01-01	1943-12-18
1944	1944-01-03	1944-12-12
1945	1945-04-26	1945-12-28
1946	1946-01-11	1946-11-19
1947	1947-02-22	1947-12-25
1948	1948-01-01	1948-12-31
1949	1949-04-06	1949-12-08
1950	1950-02-13	1950-12-15
1951	1951-01-11	1951-11-24
1952	1952-01-02	1952-12-16
1953	1953-01-31	1953-12-19
1954	1954-01-13	1954-11-07
1955	1955-01-16	1955-10-28
1956	1956-01-12	1956-12-11
1957	1957-02-11	1957-10-31
1958	1958-01-01	1958-12-08
1959	1959-01-01	1959-11-09
1960	1960-01-29	1960-12-04
1961	1961-01-06	1961-12-31
1962	1962-01-21	1962-12-30
1963	1963-03-11	1963-11-18
1964	1964-03-19	1964-12-13
1965	1965-01-07	1965-12-23
1966	1966-01-01	1966-12-19
1967	1967-02-01	1967-12-27
1968	1968-01-05	1968-12-27
1969	1969-01-18	1969-12-15
1970	1970-02-21	1970-12-04
1971	1971-01-25	1971-11-21
1972	1972-05-27	1972-11-20
1973	1973-02-12	1973-12-07
1974	1974-01-16	1974-12-25
1975	1975-01-06	1975-12-31
1976	1976-01-01	1976-12-03
1977	1977-01-27	1977-11-23
1978	1978-03-19	1978-12-28
1979	1979-02-01	1979-12-30
1980	1980-01-31	1980-12-20
1981	1981-01-02	1981-12-05
1982	1982-01-26	1982-12-19
1983	1983-01-03	1983-12-24
1984	1984-01-01	1984-12-20
1985	1985-01-21	1985-12-26
1986	1986-01-02	1986-12-30
1987	1987-01-01	1987-12-29
1988	1988-01-01	1988-12-19
1989	1989-03-07	1989-12-13
1990	1990-01-23	1990-12-26
1991	1991-01-01	1991-12-21
1992	1992-03-13	1992-12-11
1993	1993-01-20	1993-12-30
1994	1994-01-01	1994-12-28
1995	1995-01-09	1995-12-22
1996	1996-02-12	1996-12-18
1997	1997-02-04	1997-12-09
1998	1998-01-03	1998-12-15
1999	1999-01-03	1999-12-26
2000	2000-01-28	2000-12-31
2001	2001-01-05	2001-12-27
2002	2002-01-20	2002-12-29
2003	2003-01-01	2003-12-27
2004	2004-01-14	2004-12-24
2005	2005-01-17	2005-12-04
2006	2006-03-08	2006-12-08
2007	2007-01-07	2007-12-06
2008	2008-01-10	2008-12-02
2009	2009-01-22	2009-12-24
2010	2010-02-02	2010-12-16
2011	2011-01-06	2011-12-15
2012	2012-01-01	2012-12-31
2013	2013-01-29	2013-12-24
2014	2014-01-23	2014-12-26
2015	2015-01-08	2015-11-30
2016	2016-01-03	2016-11-17
2017	2017-01-12	2017-12-31
2018	2018-01-02	2018-12-20
2019	2019-01-16	2019-12-06
2020	2020-01-27	2020-12-23
2021	2021-01-07	2021-11-29
2022	2022-01-08	2022-12-30
2023	2023-01-03	2023-12-25
2024	2024-01-01	2024-12-18
2025	2025-01-01	2025-11-19
2026	2026-01-03	2026-06-27

Every Fixed Threshold

Fixed thresholds at Boskoop
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	95	42	2023	6
25 mm (0.98 in): Days with 25 mm or more rain	85	7	2013	1
50 mm (1.97 in): Days with 50 mm or more rain	12	2	1998	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1951	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

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Data for Boskoop 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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

Boskoop Threshold Days by Year

Key Facts for Boskoop Thresholds

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

Every Fixed Threshold

Download the Data

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