Grassmere Threshold Days by Year (ASN00009551)

4 fixed thresholds counted per year at Grassmere (ASN00009551): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grassmere Thresholds

Grassmere: days with 10 mm (0.39 in) or more of precipitation in 102 years, most in 1955 with 56.
Grassmere: days with 25 mm (0.98 in) or more of precipitation in 100 years, most in 1955 with 13.
Grassmere: days with 50 mm (1.97 in) or more of precipitation in 41 years, most in 1939 with 3.
Grassmere: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1921 with 1.
4 fixed thresholds have at least one qualifying day at Grassmere.

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

102 years with a qualifying day

Days per year at Grassmere with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 56 in 1955.

Days with 10 mm (0.39 in) or more of precipitation per year at Grassmere
Year	Days	Decade average
1907	38	35.3
1908	27	35.3
1909	41	35.3
1910	48	37.1
1911	31	37.1
1912	32	37.1
1913	39	37.1
1914	25	37.1
1915	42	37.1
1916	36	37.1
1917	47	37.1
1918	42	37.1
1919	29	37.1
1920	40	36.4
1921	34	36.4
1922	31	36.4
1923	43	36.4
1924	34	36.4
1925	34	36.4
1926	33	36.4
1927	37	36.4
1928	38	36.4
1929	40	36.4
1930	32	30.6
1931	30	30.6
1932	31	30.6
1933	35	30.6
1934	31	30.6
1935	34	30.6
1936	20	30.6
1937	31	30.6
1938	23	30.6
1939	39	30.6
1940	16	31.4
1941	24	31.4
1942	42	31.4
1943	40	31.4
1944	27	31.4
1945	38	31.4
1946	23	31.4
1947	33	31.4
1948	34	31.4
1949	37	31.4
1950	32	30.8
1951	38	30.8
1952	34	30.8
1953	26	30.8
1954	16	30.8
1955	56	30.8
1956	29	30.8
1957	25	30.8
1958	27	30.8
1959	25	30.8
1960	25	29.9
1961	30	29.9
1962	36	29.9
1963	32	29.9
1964	34	29.9
1965	24	29.9
1966	29	29.9
1967	33	29.9
1968	34	29.9
1969	22	29.9
1970	33	31.6
1971	33	31.6
1972	21	31.6
1973	31	31.6
1974	28	31.6
1975	36	31.6
1976	39	31.6
1977	31	31.6
1978	39	31.6
1979	25	31.6
1980	32	26.3
1981	29	26.3
1982	21	26.3
1983	24	26.3
1984	29	26.3
1985	24	26.3
1986	22	26.3
1987	17	26.3
1988	34	26.3
1989	31	26.3
1990	32	30.3
1991	31	30.3
1992	26	30.3
1993	33	30.3
1994	25	30.3
1995	30	30.3
1996	37	30.3
1997	27	30.3
1998	35	30.3
1999	27	30.3
2000	23	27.2
2001	28	27.2
2002	27	27.2
2008	29	27.2
2009	29	27.2
2010	29	26.8
2011	37	26.8
2012	27	26.8
2014	14	26.8

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

First to last qualifying date each year at Grassmere
Year	First date	Last date
1907	1907-03-27	1907-11-21
1908	1908-04-05	1908-12-06
1909	1909-03-03	1909-11-08
1910	1910-01-05	1910-11-27
1911	1911-04-23	1911-10-29
1912	1912-03-01	1912-10-20
1913	1913-01-12	1913-12-22
1914	1914-02-18	1914-12-23
1915	1915-02-21	1915-11-17
1916	1916-01-05	1916-11-24
1917	1917-01-29	1917-12-20
1918	1918-01-20	1918-12-01
1919	1919-02-06	1919-11-05
1920	1920-02-21	1920-10-21
1921	1921-01-01	1921-12-09
1922	1922-03-02	1922-12-23
1923	1923-03-25	1923-10-04
1924	1924-05-04	1924-11-10
1925	1925-01-20	1925-12-27
1926	1926-02-07	1926-12-15
1927	1927-01-09	1927-10-29
1928	1928-01-09	1928-12-21
1929	1929-01-23	1929-12-24
1930	1930-03-03	1930-12-28
1931	1931-04-13	1931-12-19
1932	1932-01-31	1932-10-30
1933	1933-01-17	1933-11-14
1934	1934-03-09	1934-11-07
1935	1935-02-25	1935-12-01
1936	1936-01-12	1936-10-01
1937	1937-03-03	1937-10-08
1938	1938-01-18	1938-11-02
1939	1939-01-19	1939-11-13
1940	1940-04-10	1940-12-18
1941	1941-03-16	1941-10-24
1942	1942-03-14	1942-12-02
1943	1943-01-01	1943-11-01
1944	1944-04-30	1944-12-16
1945	1945-03-27	1945-12-26
1946	1946-04-26	1946-12-12
1947	1947-04-07	1947-12-19
1948	1948-03-31	1948-12-24
1949	1949-03-12	1949-11-19
1950	1950-01-05	1950-11-12
1951	1951-02-14	1951-12-01
1952	1952-01-23	1952-12-18
1953	1953-02-02	1953-12-06
1954	1954-03-16	1954-11-11
1955	1955-02-06	1955-12-15
1956	1956-03-05	1956-12-05
1957	1957-04-21	1957-10-20
1958	1958-04-05	1958-12-21
1959	1959-02-08	1959-12-31
1960	1960-01-08	1960-12-17
1961	1961-01-26	1961-11-18
1962	1962-04-01	1962-12-30
1963	1963-01-01	1963-11-01
1964	1964-01-30	1964-11-30
1965	1965-03-26	1965-12-20
1966	1966-04-12	1966-10-24
1967	1967-03-14	1967-12-24
1968	1968-01-27	1968-10-31
1969	1969-03-13	1969-11-04
1970	1970-02-05	1970-11-04
1971	1971-01-31	1971-11-22
1972	1972-04-07	1972-10-06
1973	1973-04-10	1973-11-30
1974	1974-01-29	1974-11-24
1975	1975-04-03	1975-11-19
1976	1976-01-07	1976-11-28
1977	1977-04-27	1977-12-23
1978	1978-01-02	1978-12-15
1979	1979-03-28	1979-11-10
1980	1980-04-04	1980-11-26
1981	1981-04-11	1981-11-26
1982	1982-01-21	1982-11-27
1983	1983-02-06	1983-11-21
1984	1984-02-18	1984-12-09
1985	1985-01-17	1985-10-28
1986	1986-02-22	1986-10-17
1987	1987-03-17	1987-11-30
1988	1988-03-24	1988-11-07
1989	1989-01-06	1989-11-11
1990	1990-01-10	1990-11-17
1991	1991-01-03	1991-12-25
1992	1992-02-07	1992-11-20
1993	1993-03-18	1993-10-31
1994	1994-04-15	1994-10-25
1995	1995-03-25	1995-12-24
1996	1996-01-30	1996-12-13
1997	1997-02-20	1997-12-03
1998	1998-03-11	1998-10-18
1999	1999-05-06	1999-10-15
2000	2000-01-16	2000-12-29
2001	2001-03-25	2001-12-06
2002	2002-04-17	2002-11-01
2008	2008-04-01	2008-11-24
2009	2009-03-31	2009-10-27
2010	2010-01-25	2010-12-03
2011	2011-01-06	2011-12-08
2012	2012-04-30	2012-12-06
2014	2014-04-29	2014-11-13

Every Fixed Threshold

Fixed thresholds at Grassmere
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	102	56	1955	14
25 mm (0.98 in): Days with 25 mm or more rain	100	13	1955	3
50 mm (1.97 in): Days with 50 mm or more rain	41	3	1939	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1921	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

Data for Grassmere 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Grassmere Threshold Days by Year (ASN00009551)

Key Facts for Grassmere Thresholds

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

Every Fixed Threshold

Download the Data

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