Grundy Ctr Threshold Days by Year (USC00133487)

18 fixed thresholds counted per year at Grundy Ctr (USC00133487): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grundy Ctr Thresholds

Grundy Ctr: days with a maximum temperature at or above 30 C (86 F) in 129 years, most in 1931 with 76.
Grundy Ctr: days with a maximum temperature at or below 0 C (32 F) in 129 years, most in 1978 with 94.
Grundy Ctr: days with a maximum temperature at or above 90 F (32.2 C) in 128 years, most in 1936 with 58.
Grundy Ctr: nights with a minimum temperature at or below 0 C (32 F) in 128 years, most in 1966 with 179.
18 fixed thresholds have at least one qualifying day at Grundy Ctr.

Days at or above 30 C (86 F)

129 years with a qualifying day

Days per year at Grundy Ctr with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 1931.

Days at or above 30 C (86 F) per year at Grundy Ctr
Year	Days	Decade average
1893	37	47.7
1894	73	47.7
1895	47	47.7
1896	37	47.7
1897	55	47.7
1898	42	47.7
1899	43	47.7
1900	44	35.1
1901	67	35.1
1902	19	35.1
1903	17	35.1
1904	16	35.1
1905	24	35.1
1906	44	35.1
1907	30	35.1
1908	43	35.1
1909	47	35.1
1910	62	59.3
1911	67	59.3
1912	40	59.3
1913	73	59.3
1916	56	59.3
1918	52	59.3
1919	65	59.3
1920	39	45.4
1921	70	45.4
1922	56	45.4
1923	50	45.4
1924	18	45.4
1925	56	45.4
1927	43	45.4
1928	35	45.4
1929	42	45.4
1930	65	59.8
1931	76	59.8
1932	45	59.8
1933	66	59.8
1934	70	59.8
1935	34	59.8
1936	73	59.8
1937	58	59.8
1938	51	59.8
1939	60	59.8
1940	48	43
1941	56	43
1942	30	43
1943	41	43
1944	36	43
1945	27	43
1946	26	43
1947	62	43
1948	53	43
1949	51	43
1950	20	31.2
1951	7	31.2
1952	43	31.2
1953	35	31.2
1954	32	31.2
1955	59	31.2
1956	41	31.2
1957	25	31.2
1958	19	31.2
1959	31	31.2
1960	32	30.6
1962	26	30.6
1963	43	30.6
1964	49	30.6
1965	24	30.6
1966	30	30.6
1967	17	30.6
1968	34	30.6
1969	20	30.6
1970	37	32
1971	35	32
1972	33	32
1973	27	32
1974	27	32
1975	42	32
1976	33	32
1977	33	32
1978	34	32
1979	19	32
1980	44	32.1
1981	17	32.1
1982	13	32.1
1983	49	32.1
1984	26	32.1
1985	24	32.1
1986	22	32.1
1987	44	32.1
1988	61	32.1
1989	21	32.1
1990	26	28.8
1991	46	28.8
1992	12	28.8
1993	12	28.8
1994	30	28.8
1995	41	28.8
1996	22	28.8
1997	31	28.8
1998	35	28.8
1999	33	28.8
2000	29	30.3
2001	35	30.3
2002	44	30.3
2003	34	30.3
2004	14	30.3
2005	46	30.3
2006	32	30.3
2007	40	30.3
2008	18	30.3
2009	11	30.3
2010	34	30.7
2011	36	30.7
2012	56	30.7
2013	30	30.7
2014	14	30.7
2015	18	30.7
2016	30	30.7
2017	28	30.7
2018	36	30.7
2019	25	30.7
2020	33	33.3
2021	46	33.3
2022	30	33.3
2023	39	33.3
2024	27	33.3
2025	28	33.3
2026	30	33.3

For each year, a bar from the first to the last day at Grundy Ctr meeting 30 C (86 F).

First to last qualifying date each year at Grundy Ctr
Year	First date	Last date
1893	1893-06-15	1893-09-17
1894	1894-05-14	1894-09-28
1895	1895-03-29	1895-09-21
1896	1896-05-06	1896-08-14
1897	1897-05-06	1897-10-15
1898	1898-04-16	1898-09-29
1899	1899-06-04	1899-10-22
1900	1900-06-06	1900-10-05
1901	1901-04-29	1901-09-24
1902	1902-05-12	1902-08-03
1903	1903-06-29	1903-08-24
1904	1904-05-22	1904-09-28
1905	1905-06-04	1905-09-27
1906	1906-05-11	1906-09-16
1907	1907-06-17	1907-09-18
1908	1908-06-20	1908-09-25
1909	1909-05-05	1909-09-10
1910	1910-04-28	1910-10-16
1911	1911-05-08	1911-09-16
1912	1912-05-23	1912-09-10
1913	1913-04-30	1913-09-08
1916	1916-05-24	1916-10-07
1918	1918-05-03	1918-09-01
1919	1919-05-28	1919-09-20
1920	1920-06-07	1920-10-10
1921	1921-05-20	1921-10-16
1922	1922-05-10	1922-10-05
1923	1923-05-31	1923-09-05
1924	1924-05-05	1924-08-30
1925	1925-04-22	1925-09-20
1927	1927-05-21	1927-09-17
1928	1928-05-09	1928-10-10
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-09-23
1931	1931-04-08	1931-09-20
1932	1932-05-13	1932-08-30
1933	1933-06-02	1933-09-23
1934	1934-05-05	1934-08-19
1935	1935-06-12	1935-09-24
1936	1936-05-06	1936-09-22
1937	1937-05-29	1937-09-30
1938	1938-06-14	1938-10-09
1939	1939-04-24	1939-10-07
1940	1940-05-12	1940-09-22
1941	1941-05-04	1941-09-21
1942	1942-04-29	1942-09-17
1943	1943-05-28	1943-09-03
1944	1944-05-14	1944-09-17
1945	1945-06-23	1945-09-07
1946	1946-06-10	1946-09-06
1947	1947-06-09	1947-10-21
1948	1948-04-18	1948-09-19
1949	1949-04-25	1949-08-26
1950	1950-06-21	1950-10-18
1951	1951-07-07	1951-08-30
1952	1952-04-29	1952-09-30
1953	1953-05-25	1953-10-02
1954	1954-06-11	1954-09-27
1955	1955-05-02	1955-09-18
1956	1956-05-13	1956-10-12
1957	1957-06-05	1957-08-31
1958	1958-05-14	1958-09-03
1959	1959-05-02	1959-09-08
1960	1960-04-22	1960-09-07
1962	1962-05-05	1962-10-10
1963	1963-05-08	1963-10-06
1964	1964-04-16	1964-09-09
1965	1965-05-02	1965-09-09
1966	1966-05-05	1966-09-01
1967	1967-04-16	1967-08-29
1968	1968-05-03	1968-08-24
1969	1969-05-28	1969-08-31
1970	1970-04-29	1970-09-21
1971	1971-06-05	1971-10-02
1972	1972-05-21	1972-09-19
1973	1973-06-09	1973-09-01
1974	1974-06-15	1974-08-27
1975	1975-05-19	1975-10-14
1976	1976-06-09	1976-10-02
1977	1977-05-19	1977-08-28
1978	1978-05-26	1978-09-13
1979	1979-05-30	1979-09-12
1980	1980-04-22	1980-09-21
1981	1981-04-28	1981-09-12
1982	1982-07-04	1982-08-20
1983	1983-06-22	1983-09-10
1984	1984-06-06	1984-09-25
1985	1985-04-19	1985-09-20
1986	1986-03-30	1986-09-27
1987	1987-04-19	1987-09-06
1988	1988-05-15	1988-09-18
1989	1989-05-30	1989-08-23
1990	1990-06-13	1990-10-07
1991	1991-04-07	1991-09-14
1992	1992-05-01	1992-08-25
1993	1993-06-18	1993-09-13
1994	1994-04-19	1994-09-16
1995	1995-06-17	1995-09-14
1996	1996-05-18	1996-09-05
1997	1997-06-16	1997-10-08
1998	1998-05-15	1998-09-27
1999	1999-05-30	1999-09-08
2000	2000-05-12	2000-09-19
2001	2001-05-15	2001-08-24
2002	2002-04-16	2002-10-01
2003	2003-04-02	2003-10-21
2004	2004-04-17	2004-09-02
2005	2005-06-07	2005-10-05
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-10-07
2008	2008-06-08	2008-09-03
2009	2009-04-25	2009-08-15
2010	2010-05-24	2010-10-10
2011	2011-04-11	2011-09-13
2012	2012-05-16	2012-09-12
2013	2013-05-15	2013-09-20
2014	2014-05-08	2014-09-05
2015	2015-06-10	2015-09-17
2016	2016-05-07	2016-09-22
2017	2017-05-16	2017-09-26
2018	2018-05-25	2018-10-04
2019	2019-06-01	2019-10-02
2020	2020-06-02	2020-09-07
2021	2021-05-02	2021-10-01
2022	2022-05-10	2022-09-21
2023	2023-05-31	2023-10-04
2024	2024-05-19	2024-10-06
2025	2025-06-03	2025-10-05
2026	2026-03-22	2026-10-13

Every Fixed Threshold

Fixed thresholds at Grundy Ctr
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	129	76	1931	30
35 C (95 F): Days	84	34	1936	4
40 C (104 F): Days	6	7	1936	7
90 F (32.2 C): Days	128	58	1936	9
100 F (37.8 C): Days	21	17	1936	1
0 C (32 F): Ice days (max	129	94	1978	33
0 C (32 F): Frost days (min	128	179	1966	85
-10 C (14 F): Days with min	128	97	1893	30
-20 C (-4 F): Days with min	128	41	1963	7
-30 C (-22 F): Days with min	47	8	1994	2
20 C (68 F): Tropical nights (min	127	35	1936	19
25 C (77 F): Days with min	21	3	1918	1
10 mm (0.39 in): Days with 10 mm or more rain	126	39	1993	31
25 mm (0.98 in): Days with 25 mm or more rain	126	17	1924	13
50 mm (1.97 in): Days with 50 mm or more rain	95	6	1900	2
100 mm (3.94 in): Days with 100 mm or more rain	14	3	1924	2
10 cm (3.9 in): Days with 10 cm or more snowfall	85	7	1937	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1932	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Grundy Ctr 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Grundy Ctr Threshold Days by Year (USC00133487)

Key Facts for Grundy Ctr Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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