Harrison Threshold Days by Year (USC00253615)

19 fixed thresholds counted per year at Harrison (USC00253615): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Harrison Thresholds

Harrison: days with a maximum temperature at or above 30 C (86 F) in 104 years, most in 1936 with 76.
Harrison: days with a maximum temperature at or above 90 F (32.2 C) in 104 years, most in 1936 with 56.
Harrison: days with a maximum temperature at or below 0 C (32 F) in 104 years, most in 1978 with 85.
Harrison: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1915 with 27.
19 fixed thresholds have at least one qualifying day at Harrison.

Days at or above 30 C (86 F)

104 years with a qualifying day

Days per year at Harrison with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 1936.

Days at or above 30 C (86 F) per year at Harrison
Year	Days	Decade average
1915	9	25.7
1916	34	25.7
1917	34	25.7
1921	54	32.3
1922	37	32.3
1923	17	32.3
1924	40	32.3
1925	25	32.3
1926	36	32.3
1927	10	32.3
1928	26	32.3
1929	46	32.3
1930	48	57.2
1931	65	57.2
1932	54	57.2
1933	68	57.2
1934	59	57.2
1935	52	57.2
1936	76	57.2
1937	59	57.2
1938	40	57.2
1939	51	57.2
1940	68	48.2
1941	38	48.2
1942	38	48.2
1943	60	48.2
1944	39	48.2
1945	46	48.2
1946	45	48.2
1947	52	48.2
1948	48	48.2
1949	48	48.2
1950	34	44.7
1951	24	44.7
1952	62	44.7
1953	49	44.7
1954	58	44.7
1955	54	44.7
1956	38	44.7
1957	33	44.7
1959	50	44.7
1960	48	38.3
1961	47	38.3
1962	30	38.3
1963	51	38.3
1964	47	38.3
1965	16	38.3
1966	46	38.3
1967	25	38.3
1968	28	38.3
1969	45	38.3
1970	49	39.9
1971	34	39.9
1972	24	39.9
1973	38	39.9
1974	43	39.9
1975	46	39.9
1976	45	39.9
1977	39	39.9
1978	49	39.9
1979	32	39.9
1980	49	41.3
1981	31	41.3
1982	38	41.3
1983	54	41.3
1984	37	41.3
1985	41	41.3
1986	22	41.3
1987	34	41.3
1988	58	41.3
1989	49	41.3
1990	37	30.7
1991	33	30.7
1992	18	30.7
1993	18	30.7
1994	36	30.7
1995	37	30.7
1996	31	30.7
1997	30	30.7
1998	33	30.7
1999	34	30.7
2000	68	47.2
2001	61	47.2
2002	56	47.2
2003	41	47.2
2004	32	47.2
2005	42	47.2
2006	49	47.2
2007	68	47.2
2008	33	47.2
2009	22	47.2
2010	41	40
2011	46	40
2012	66	40
2013	40	40
2014	30	40
2015	39	40
2016	41	40
2017	38	40
2018	31	40
2019	28	40
2020	57	51.3
2021	49	51.3
2022	48	51.3

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

First to last qualifying date each year at Harrison
Year	First date	Last date
1915	1915-05-13	1915-09-22
1916	1916-06-28	1916-09-08
1917	1917-06-17	1917-09-08
1921	1921-06-10	1921-09-25
1922	1922-06-20	1922-10-03
1923	1923-06-24	1923-09-09
1924	1924-06-14	1924-09-24
1925	1925-05-20	1925-09-03
1926	1926-05-23	1926-09-20
1927	1927-06-23	1927-10-21
1928	1928-07-01	1928-09-18
1929	1929-06-15	1929-09-02
1930	1930-06-17	1930-09-22
1931	1931-05-25	1931-10-05
1932	1932-06-22	1932-09-14
1933	1933-05-31	1933-09-29
1934	1934-05-07	1934-09-12
1935	1935-06-14	1935-09-23
1936	1936-05-14	1936-09-22
1937	1937-05-28	1937-09-20
1938	1938-05-28	1938-09-29
1939	1939-05-19	1939-09-14
1940	1940-05-31	1940-09-09
1941	1941-05-12	1941-09-19
1942	1942-07-03	1942-09-10
1943	1943-05-28	1943-09-27
1944	1944-06-24	1944-09-14
1945	1945-06-22	1945-09-21
1946	1946-06-09	1946-09-14
1947	1947-07-02	1947-10-05
1948	1948-05-17	1948-09-18
1949	1949-06-20	1949-09-25
1950	1950-06-06	1950-09-07
1951	1951-07-05	1951-08-29
1952	1952-06-06	1952-09-27
1953	1953-06-10	1953-10-01
1954	1954-05-20	1954-09-22
1955	1955-06-29	1955-09-16
1956	1956-06-08	1956-09-27
1957	1957-06-30	1957-09-29
1959	1959-06-07	1959-09-15
1960	1960-06-20	1960-09-21
1961	1961-06-10	1961-09-17
1962	1962-06-28	1962-09-12
1963	1963-06-22	1963-09-18
1964	1964-05-21	1964-09-09
1965	1965-07-08	1965-08-29
1966	1966-05-30	1966-09-25
1967	1967-07-01	1967-09-23
1968	1968-06-04	1968-09-15
1969	1969-05-26	1969-09-29
1970	1970-06-25	1970-09-09
1971	1971-06-24	1971-09-14
1972	1972-06-12	1972-09-19
1973	1973-06-08	1973-09-01
1974	1974-06-14	1974-09-11
1975	1975-06-30	1975-09-11
1976	1976-06-11	1976-09-18
1977	1977-06-03	1977-09-09
1978	1978-05-16	1978-09-11
1979	1979-06-06	1979-09-20
1980	1980-04-22	1980-10-01
1981	1981-06-07	1981-09-29
1982	1982-07-04	1982-09-11
1983	1983-06-19	1983-09-18
1984	1984-05-24	1984-09-20
1985	1985-06-08	1985-08-31
1986	1986-06-18	1986-08-30
1987	1987-06-06	1987-09-27
1988	1988-05-18	1988-09-11
1989	1989-05-24	1989-09-18
1990	1990-06-05	1990-09-13
1991	1991-06-26	1991-09-03
1992	1992-05-08	1992-09-24
1993	1993-06-28	1993-09-14
1994	1994-06-05	1994-09-29
1995	1995-06-15	1995-09-17
1996	1996-05-17	1996-10-12
1997	1997-06-20	1997-09-16
1998	1998-06-29	1998-09-19
1999	1999-06-26	1999-09-01
2000	2000-05-05	2000-09-18
2001	2001-05-14	2001-09-27
2002	2002-05-31	2002-09-08
2003	2003-05-30	2003-09-06
2004	2004-05-06	2004-09-19
2005	2005-05-21	2005-10-02
2006	2006-05-28	2006-09-15
2007	2007-05-12	2007-09-23
2008	2008-06-25	2008-09-01
2009	2009-05-19	2009-09-11
2010	2010-05-29	2010-09-29
2011	2011-06-06	2011-10-02
2012	2012-05-17	2012-09-16
2013	2013-05-14	2013-09-18
2014	2014-05-30	2014-09-27
2015	2015-06-20	2015-09-15
2016	2016-06-08	2016-09-21
2017	2017-06-10	2017-09-14
2018	2018-05-27	2018-09-16
2019	2019-06-29	2019-09-17
2020	2020-06-01	2020-09-25
2021	2021-06-05	2021-09-19
2022	2022-05-28	2022-09-20

Every Fixed Threshold

Fixed thresholds at Harrison
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	104	76	1936	48
35 C (95 F): Days	97	36	1936	10
40 C (104 F): Days	9	5	1931	1
90 F (32.2 C): Days	104	56	1936	33
100 F (37.8 C): Days	36	14	1936	1
0 C (32 F): Ice days (max	104	85	1978	46
0 C (32 F): Frost days (min	102	214	1924	193
-10 C (14 F): Days with min	102	98	1978	78
-20 C (-4 F): Days with min	101	34	1924	24
-30 C (-22 F): Days with min	48	7	1924	3
20 C (68 F): Tropical nights (min	21	5	1927	1
25 C (77 F): Days with min	1	1	1929	1
10 mm (0.39 in): Days with 10 mm or more rain	104	27	1915	6
25 mm (0.98 in): Days with 25 mm or more rain	96	8	1927	3
50 mm (1.97 in): Days with 50 mm or more rain	32	2	1925	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1916	1
10 cm (3.9 in): Days with 10 cm or more snowfall	92	10	1973	8
25 cm (9.8 in): Days with 25 cm or more snowfall	50	3	1927	1
50 cm (19.7 in): Days with 50 cm or more snowfall	3	1	1927	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Harrison 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).

Harrison Threshold Days by Year (USC00253615)

Key Facts for Harrison Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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