Grafton Threshold Days by Year (USC00113572)

6 fixed thresholds counted per year at Grafton (USC00113572): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grafton Thresholds

Grafton: days with 10 mm (0.39 in) or more of precipitation in 96 years, most in 1990 with 45.
Grafton: days with 25 mm (0.98 in) or more of precipitation in 96 years, most in 1998 with 19.
Grafton: days with 50 mm (1.97 in) or more of precipitation in 74 years, most in 1946 with 7.
Grafton: days with 10 cm (3.9 in) or more of snowfall in 16 years, most in 1980 with 5.
6 fixed thresholds have at least one qualifying day at Grafton.

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

96 years with a qualifying day

Days per year at Grafton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1990.

Days with 10 mm (0.39 in) or more of precipitation per year at Grafton
Year	Days	Decade average
1895	26	32.6
1896	30	32.6
1897	32	32.6
1898	42	32.6
1899	33	32.6
1901	14	32.8
1902	33	32.8
1904	39	32.8
1905	30	32.8
1906	36	32.8
1907	35	32.8
1908	34	32.8
1909	41	32.8
1910	33	31.3
1911	35	31.3
1912	38	31.3
1913	27	31.3
1914	23	31.3
1915	39	31.3
1916	32	31.3
1917	24	31.3
1918	33	31.3
1919	29	31.3
1920	25	34
1922	25	34
1923	39	34
1924	34	34
1925	29	34
1926	39	34
1927	44	34
1928	30	34
1929	41	34
1930	22	29.7
1932	27	29.7
1933	33	29.7
1934	23	29.7
1935	44	29.7
1936	24	29.7
1937	25	29.7
1938	35	29.7
1939	34	29.7
1940	25	34.1
1941	35	34.1
1942	41	34.1
1943	30	34.1
1944	29	34.1
1945	38	34.1
1946	34	34.1
1947	29	34.1
1948	41	34.1
1949	39	34.1
1950	23	26.4
1951	32	26.4
1952	21	26.4
1953	16	26.4
1954	20	26.4
1955	23	26.4
1956	32	26.4
1957	41	26.4
1958	32	26.4
1959	24	26.4
1960	27	29.9
1961	35	29.9
1962	29	29.9
1963	22	29.9
1964	30	29.9
1965	27	29.9
1967	33	29.9
1968	26	29.9
1969	40	29.9
1970	31	29.8
1971	27	29.8
1972	32	29.8
1973	37	29.8
1975	34	29.8
1976	21	29.8
1977	26	29.8
1978	36	29.8
1979	24	29.8
1980	26	32.5
1981	44	32.5
1982	31	32.5
1983	36	32.5
1984	36	32.5
1987	32	32.5
1988	31	32.5
1989	24	32.5
1990	45	35.6
1991	28	35.6
1992	28	35.6
1993	45	35.6
1994	36	35.6
1995	33	35.6
1996	34	35.6
1997	28	35.6
1998	43	35.6

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

First to last qualifying date each year at Grafton
Year	First date	Last date
1895	1895-03-01	1895-12-24
1896	1896-01-23	1896-10-12
1897	1897-01-03	1897-12-14
1898	1898-01-12	1898-12-22
1899	1899-01-13	1899-12-19
1901	1901-01-10	1901-12-14
1902	1902-01-21	1902-12-21
1904	1904-01-21	1904-12-17
1905	1905-01-12	1905-12-29
1906	1906-01-03	1906-12-30
1907	1907-01-14	1907-12-23
1908	1908-01-04	1908-12-30
1909	1909-01-12	1909-12-26
1910	1910-01-13	1910-12-29
1911	1911-02-06	1911-12-26
1912	1912-01-06	1912-11-06
1913	1913-01-11	1913-12-21
1914	1914-01-24	1914-11-08
1915	1915-01-17	1915-12-28
1916	1916-01-12	1916-11-23
1917	1917-01-05	1917-10-18
1918	1918-01-06	1918-12-24
1919	1919-01-01	1919-11-29
1920	1920-02-21	1920-12-21
1922	1922-01-21	1922-12-28
1923	1923-01-14	1923-12-13
1924	1924-01-20	1924-12-19
1925	1925-02-11	1925-12-04
1926	1926-01-18	1926-12-24
1927	1927-03-07	1927-12-28
1928	1928-01-19	1928-12-17
1929	1929-01-05	1929-12-18
1930	1930-01-02	1930-11-30
1932	1932-01-01	1932-12-31
1933	1933-01-18	1933-12-20
1934	1934-01-05	1934-12-19
1935	1935-01-08	1935-12-07
1936	1936-01-25	1936-12-31
1937	1937-01-08	1937-12-16
1938	1938-01-24	1938-12-23
1939	1939-01-05	1939-12-24
1940	1940-01-07	1940-12-16
1941	1941-01-01	1941-12-23
1942	1942-01-01	1942-12-27
1943	1943-02-03	1943-12-29
1944	1944-02-22	1944-12-10
1945	1945-02-17	1945-12-24
1946	1946-01-09	1946-12-29
1947	1947-01-02	1947-12-04
1948	1948-01-01	1948-12-29
1949	1949-01-04	1949-12-26
1950	1950-01-03	1950-11-20
1951	1951-02-06	1951-12-14
1952	1952-03-18	1952-12-20
1953	1953-01-02	1953-10-27
1954	1954-01-27	1954-12-29
1955	1955-01-05	1955-11-02
1956	1956-01-30	1956-12-20
1957	1957-01-22	1957-12-20
1958	1958-01-21	1958-11-26
1959	1959-01-21	1959-12-18
1960	1960-01-15	1960-12-11
1961	1961-02-03	1961-12-17
1962	1962-01-06	1962-12-21
1963	1963-03-05	1963-11-23
1964	1964-01-12	1964-11-28
1965	1965-01-02	1965-12-25
1967	1967-01-26	1967-12-22
1968	1968-01-30	1968-12-28
1969	1969-01-16	1969-12-23
1970	1970-03-03	1970-12-21
1971	1971-01-04	1971-12-15
1972	1972-03-13	1972-12-30
1973	1973-01-04	1973-12-31
1975	1975-01-10	1975-12-30
1976	1976-02-21	1976-12-07
1977	1977-02-24	1977-12-14
1978	1978-01-17	1978-12-30
1979	1979-01-01	1979-12-25
1980	1980-02-15	1980-11-27
1981	1981-02-10	1981-12-23
1982	1982-01-03	1982-12-25
1983	1983-02-02	1983-12-11
1984	1984-02-17	1984-12-30
1987	1987-01-10	1987-12-28
1988	1988-01-19	1988-12-28
1989	1989-01-06	1989-09-14
1990	1990-01-20	1990-12-30
1991	1991-01-10	1991-12-12
1992	1992-02-14	1992-12-16
1993	1993-01-04	1993-12-02
1994	1994-01-17	1994-12-22
1995	1995-01-14	1995-12-19
1996	1996-01-19	1996-12-01
1997	1997-01-08	1997-12-24
1998	1998-01-06	1998-12-06

Every Fixed Threshold

Fixed thresholds at Grafton
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	96	45	1990	43
25 mm (0.98 in): Days with 25 mm or more rain	96	19	1998	19
50 mm (1.97 in): Days with 50 mm or more rain	74	7	1946	3
100 mm (3.94 in): Days with 100 mm or more rain	9	2	1946	2
10 cm (3.9 in): Days with 10 cm or more snowfall	16	5	1980	2
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1987	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

Data for Grafton 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).

Grafton Threshold Days by Year (USC00113572)

Key Facts for Grafton Thresholds

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

Every Fixed Threshold

Download the Data

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