Hiram Threshold Days by Year (USC00333780)

17 fixed thresholds counted per year at Hiram (USC00333780): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hiram Thresholds

Hiram: days with a maximum temperature at or above 30 C (86 F) in 126 years, most in 1894 with 47.
Hiram: days with a maximum temperature at or below 0 C (32 F) in 126 years, most in 1920 with 69.
Hiram: nights with a minimum temperature at or below 0 C (32 F) in 124 years, most in 1917 with 165.
Hiram: nights with a minimum temperature at or below -10 C (14 F) in 124 years, most in 2014 with 60.
17 fixed thresholds have at least one qualifying day at Hiram.

Days at or above 30 C (86 F)

126 years with a qualifying day

Days per year at Hiram with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1894.

Days at or above 30 C (86 F) per year at Hiram
Year	Days	Decade average
1894	47	31.2
1895	40	31.2
1896	13	31.2
1897	20	31.2
1898	32	31.2
1899	35	31.2
1900	40	17.5
1901	31	17.5
1902	18	17.5
1903	12	17.5
1904	8	17.5
1905	5	17.5
1906	14	17.5
1907	7	17.5
1908	30	17.5
1909	10	17.5
1910	29	25.6
1911	29	25.6
1912	19	25.6
1913	37	25.6
1914	32	25.6
1915	11	25.6
1916	31	25.6
1917	12	25.6
1918	26	25.6
1919	30	25.6
1920	10	19
1921	38	19
1922	18	19
1923	17	19
1924	8	19
1925	23	19
1926	19	19
1927	17	19
1928	22	19
1929	18	19
1930	34	32.2
1931	38	32.2
1932	20	32.2
1933	47	32.2
1934	45	32.2
1935	22	32.2
1936	44	32.2
1937	23	32.2
1938	19	32.2
1939	30	32.2
1940	27	27.5
1941	25	27.5
1942	15	27.5
1943	18	27.5
1944	36	27.5
1945	30	27.5
1946	29	27.5
1947	25	27.5
1948	26	27.5
1949	44	27.5
1951	21	30.9
1952	46	30.9
1953	40	30.9
1954	29	30.9
1955	47	30.9
1957	24	30.9
1958	9	30.9
1960	15	22.3
1961	24	22.3
1962	29	22.3
1963	20	22.3
1964	30	22.3
1965	15	22.3
1966	37	22.3
1967	14	22.3
1969	17	22.3
1970	15	15.3
1971	16	15.3
1972	9	15.3
1974	13	15.3
1975	21	15.3
1976	14	15.3
1977	21	15.3
1978	19	15.3
1979	10	15.3
1980	14	20.6
1981	11	20.6
1982	15	20.6
1983	32	20.6
1984	16	20.6
1985	13	20.6
1986	11	20.6
1987	29	20.6
1988	44	20.6
1990	7	19.2
1991	43	19.2
1992	3	19.2
1993	32	19.2
1995	29	19.2
1996	8	19.2
1997	8	19.2
1998	16	19.2
1999	27	19.2
2000	4	14.3
2001	20	14.3
2002	33	14.3
2003	9	14.3
2004	1	14.3
2005	32	14.3
2006	9	14.3
2007	21	14.3
2008	9	14.3
2009	5	14.3
2010	25	17.5
2011	22	17.5
2012	24	17.5
2013	8	17.5
2014	4	17.5
2015	16	17.5
2016	29	17.5
2017	12	17.5
2018	22	17.5
2019	13	17.5
2020	21	17.1
2021	16	17.1
2022	12	17.1
2023	6	17.1
2024	22	17.1
2025	27	17.1
2026	16	17.1

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

First to last qualifying date each year at Hiram
Year	First date	Last date
1894	1894-06-10	1894-09-14
1895	1895-05-05	1895-09-22
1896	1896-05-09	1896-09-12
1897	1897-07-02	1897-09-16
1898	1898-06-24	1898-09-03
1899	1899-06-04	1899-09-17
1900	1900-05-14	1900-09-26
1901	1901-06-12	1901-08-14
1902	1902-05-22	1902-08-31
1903	1903-05-19	1903-09-14
1904	1904-05-25	1904-09-29
1905	1905-06-15	1905-07-18
1906	1906-06-09	1906-09-18
1907	1907-06-23	1907-09-16
1908	1908-06-19	1908-09-26
1909	1909-06-21	1909-09-14
1910	1910-06-20	1910-09-05
1911	1911-05-18	1911-08-16
1912	1912-06-29	1912-09-10
1913	1913-06-06	1913-09-07
1914	1914-05-25	1914-09-22
1915	1915-04-25	1915-09-16
1916	1916-07-08	1916-09-07
1917	1917-07-21	1917-09-20
1918	1918-05-31	1918-08-25
1919	1919-05-30	1919-09-08
1920	1920-06-10	1920-08-08
1921	1921-06-17	1921-09-09
1922	1922-06-07	1922-10-05
1923	1923-06-01	1923-08-07
1924	1924-06-19	1924-08-31
1925	1925-04-24	1925-09-20
1926	1926-05-02	1926-08-29
1927	1927-06-29	1927-10-01
1928	1928-07-07	1928-10-12
1929	1929-05-27	1929-09-05
1930	1930-05-09	1930-09-15
1931	1931-05-28	1931-09-22
1932	1932-06-20	1932-09-19
1933	1933-06-06	1933-09-25
1934	1934-05-19	1934-09-25
1935	1935-07-02	1935-09-18
1936	1936-05-10	1936-09-23
1937	1937-05-31	1937-09-03
1938	1938-04-27	1938-08-20
1939	1939-05-26	1939-10-08
1940	1940-06-06	1940-09-20
1941	1941-05-21	1941-09-09
1942	1942-05-01	1942-09-15
1943	1943-06-04	1943-09-01
1944	1944-05-31	1944-09-03
1945	1945-06-14	1945-09-10
1946	1946-06-17	1946-09-28
1947	1947-06-10	1947-09-19
1948	1948-06-22	1948-09-17
1949	1949-05-04	1949-10-10
1951	1951-06-01	1951-10-05
1952	1952-06-06	1952-10-01
1953	1953-05-30	1953-10-03
1954	1954-06-09	1954-09-29
1955	1955-06-06	1955-09-19
1957	1957-06-13	1957-09-02
1958	1958-06-05	1958-09-04
1960	1960-04-24	1960-09-08
1961	1961-06-11	1961-09-24
1962	1962-05-14	1962-09-13
1963	1963-05-08	1963-10-07
1964	1964-05-19	1964-08-11
1965	1965-06-28	1965-09-19
1966	1966-06-09	1966-09-03
1967	1967-05-27	1967-08-02
1969	1969-05-29	1969-09-01
1970	1970-06-10	1970-08-30
1971	1971-06-06	1971-09-08
1972	1972-07-11	1972-08-18
1974	1974-06-09	1974-08-03
1975	1975-05-21	1975-08-24
1976	1976-06-08	1976-09-09
1977	1977-05-17	1977-09-01
1978	1978-05-27	1978-09-20
1979	1979-05-09	1979-08-08
1980	1980-06-26	1980-09-01
1981	1981-06-15	1981-07-25
1982	1982-05-18	1982-09-13
1983	1983-06-11	1983-09-10
1984	1984-06-08	1984-09-22
1985	1985-04-23	1985-09-08
1986	1986-04-28	1986-08-17
1987	1987-05-14	1987-08-17
1988	1988-05-31	1988-08-18
1990	1990-04-28	1990-08-29
1991	1991-05-13	1991-09-17
1992	1992-06-18	1992-07-15
1993	1993-06-18	1993-09-15
1995	1995-06-19	1995-09-01
1996	1996-05-20	1996-08-08
1997	1997-06-22	1997-08-17
1998	1998-05-16	1998-09-27
1999	1999-06-07	1999-09-04
2000	2000-06-11	2000-09-03
2001	2001-06-14	2001-08-10
2002	2002-06-22	2002-09-11
2003	2003-06-25	2003-08-27
2004	2004-06-10	2004-06-10
2005	2005-06-08	2005-08-20
2006	2006-05-30	2006-08-03
2007	2007-06-01	2007-09-07
2008	2008-06-07	2008-09-04
2009	2009-06-26	2009-08-18
2010	2010-06-28	2010-09-25
2011	2011-05-31	2011-09-04
2012	2012-05-04	2012-09-01
2013	2013-06-24	2013-09-12
2014	2014-06-18	2014-09-06
2015	2015-05-09	2015-09-09
2016	2016-06-02	2016-09-08
2017	2017-06-13	2017-09-28
2018	2018-05-29	2018-09-06
2019	2019-06-28	2019-10-02
2020	2020-05-26	2020-08-28
2021	2021-05-22	2021-08-30
2022	2022-06-01	2022-08-25
2023	2023-05-18	2023-09-06
2024	2024-06-17	2024-09-01
2025	2025-06-06	2025-08-20
2026	2026-05-19	2026-08-06

Every Fixed Threshold

Fixed thresholds at Hiram
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	126	47	1894	16
35 C (95 F): Days	34	10	1933	1
90 F (32.2 C): Days	104	28	1988	6
100 F (37.8 C): Days	6	4	1936	1
0 C (32 F): Ice days (max	126	69	1920	32
0 C (32 F): Frost days (min	124	165	1917	81
-10 C (14 F): Days with min	124	60	2014	37
-20 C (-4 F): Days with min	88	26	2015	9
-30 C (-22 F): Days with min	4	2	2015	2
20 C (68 F): Tropical nights (min	121	25	1921	10
25 C (77 F): Days with min	8	2	1949	2
10 mm (0.39 in): Days with 10 mm or more rain	124	54	2011	29
25 mm (0.98 in): Days with 25 mm or more rain	123	19	2011	8
50 mm (1.97 in): Days with 50 mm or more rain	61	3	1905	2
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1971	1
10 cm (3.9 in): Days with 10 cm or more snowfall	103	16	2010	2
25 cm (9.8 in): Days with 25 cm or more snowfall	15	3	2008	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Hiram 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).

Hiram Threshold Days by Year (USC00333780)

Key Facts for Hiram Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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