Hanover Threshold Days by Year (USC00273850)

18 fixed thresholds counted per year at Hanover (USC00273850): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hanover Thresholds

Hanover: nights with a minimum temperature at or below 0 C (32 F) in 130 years, most in 1911 with 195.
Hanover: nights with a minimum temperature at or below -10 C (14 F) in 130 years, most in 1904 with 98.
Hanover: nights with a minimum temperature at or below -20 C (-4 F) in 130 years, most in 1904 with 39.
Hanover: days with a maximum temperature at or above 30 C (86 F) in 128 years, most in 1987 with 52.
18 fixed thresholds have at least one qualifying day at Hanover.

Days at or above 30 C (86 F)

128 years with a qualifying day

Days per year at Hanover with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 52 in 1987.

Days at or above 30 C (86 F) per year at Hanover
Year	Days	Decade average
1894	11	15.8
1895	8	15.8
1896	15	15.8
1897	7	15.8
1898	27	15.8
1899	27	15.8
1900	28	21.2
1901	28	21.2
1902	6	21.2
1903	13	21.2
1904	14	21.2
1905	19	21.2
1906	29	21.2
1907	18	21.2
1908	37	21.2
1909	20	21.2
1910	22	21.5
1911	30	21.5
1912	18	21.5
1913	26	21.5
1914	26	21.5
1915	12	21.5
1916	23	21.5
1917	16	21.5
1918	22	21.5
1919	20	21.5
1920	13	13.4
1921	26	13.4
1922	9	13.4
1923	17	13.4
1924	14	13.4
1925	16	13.4
1926	4	13.4
1927	4	13.4
1928	12	13.4
1929	19	13.4
1930	24	20.6
1931	17	20.6
1932	13	20.6
1933	19	20.6
1934	19	20.6
1935	15	20.6
1936	15	20.6
1937	32	20.6
1938	22	20.6
1939	30	20.6
1940	17	25.6
1941	26	25.6
1942	18	25.6
1943	21	25.6
1944	36	25.6
1945	23	25.6
1946	19	25.6
1947	34	25.6
1948	22	25.6
1949	40	25.6
1950	4	20.4
1951	17	20.4
1952	28	20.4
1953	36	20.4
1954	10	20.4
1955	36	20.4
1956	11	20.4
1957	15	20.4
1958	10	20.4
1959	37	20.4
1960	13	19.9
1961	29	19.9
1962	17	19.9
1963	29	19.9
1964	21	19.9
1965	26	19.9
1966	19	19.9
1967	14	19.9
1968	15	19.9
1969	16	19.9
1970	27	21
1971	23	21
1972	14	21
1973	26	21
1974	15	21
1975	25	21
1976	14	21
1977	22	21
1978	23	21
1981	22	38.7
1982	30	38.7
1983	42	38.7
1984	32	38.7
1985	40	38.7
1986	31	38.7
1987	52	38.7
1988	48	38.7
1989	51	38.7
1990	24	22.3
1991	26	22.3
1992	12	22.3
1993	24	22.3
1994	18	22.3
1995	37	22.3
1996	14	22.3
1997	26	22.3
1998	20	22.3
2000	10	21.8
2002	40	21.8
2003	20	21.8
2004	12	21.8
2005	41	21.8
2006	20	21.8
2007	26	21.8
2008	14	21.8
2009	13	21.8
2010	35	27.9
2011	15	27.9
2012	29	27.9
2013	27	27.9
2014	20	27.9
2015	31	27.9
2016	41	27.9
2017	22	27.9
2018	33	27.9
2019	26	27.9
2020	48	30.5
2021	27	30.5
2022	40	30.5
2023	22	30.5
2024	27	30.5
2026	19	30.5

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

First to last qualifying date each year at Hanover
Year	First date	Last date
1894	1894-06-11	1894-07-29
1895	1895-06-01	1895-09-23
1896	1896-05-09	1896-09-12
1897	1897-07-05	1897-09-10
1898	1898-06-08	1898-09-04
1899	1899-05-01	1899-08-30
1900	1900-05-14	1900-09-26
1901	1901-05-22	1901-09-07
1902	1902-05-23	1902-09-01
1903	1903-04-30	1903-09-15
1904	1904-06-05	1904-08-01
1905	1905-06-15	1905-09-09
1906	1906-05-18	1906-09-21
1907	1907-06-18	1907-09-16
1908	1908-05-26	1908-09-27
1909	1909-06-22	1909-10-10
1910	1910-06-14	1910-08-25
1911	1911-05-11	1911-08-15
1912	1912-06-02	1912-08-14
1913	1913-04-25	1913-09-03
1914	1914-05-26	1914-09-23
1915	1915-04-26	1915-09-16
1916	1916-07-07	1916-09-14
1917	1917-06-20	1917-08-20
1918	1918-06-01	1918-08-26
1919	1919-06-02	1919-09-08
1920	1920-06-01	1920-09-26
1921	1921-05-21	1921-09-03
1922	1922-06-08	1922-08-18
1923	1923-06-05	1923-08-10
1924	1924-06-20	1924-09-01
1925	1925-06-03	1925-09-12
1926	1926-07-20	1926-07-27
1927	1927-06-10	1927-07-14
1928	1928-07-03	1928-08-17
1929	1929-05-28	1929-09-03
1930	1930-05-02	1930-10-13
1931	1931-05-28	1931-09-14
1932	1932-05-16	1932-09-01
1933	1933-06-03	1933-08-02
1934	1934-06-02	1934-08-19
1935	1935-07-05	1935-08-19
1936	1936-05-08	1936-08-16
1937	1937-05-31	1937-09-03
1938	1938-04-28	1938-08-20
1939	1939-05-07	1939-09-16
1940	1940-06-05	1940-08-18
1941	1941-04-20	1941-09-16
1942	1942-06-10	1942-09-16
1943	1943-06-03	1943-09-07
1944	1944-05-04	1944-09-02
1945	1945-06-14	1945-09-08
1946	1946-05-25	1946-09-18
1947	1947-06-11	1947-10-17
1948	1948-06-04	1948-09-13
1949	1949-05-05	1949-08-28
1950	1950-06-09	1950-07-13
1951	1951-05-16	1951-08-30
1952	1952-06-15	1952-09-13
1953	1953-05-10	1953-09-05
1954	1954-04-22	1954-08-25
1955	1955-06-18	1955-09-18
1956	1956-06-12	1956-08-18
1957	1957-06-11	1957-09-22
1958	1958-06-30	1958-08-31
1959	1959-05-21	1959-09-09
1960	1960-06-17	1960-09-09
1961	1961-05-14	1961-09-24
1962	1962-04-27	1962-09-01
1963	1963-06-02	1963-10-07
1964	1964-05-07	1964-08-30
1965	1965-05-10	1965-09-23
1966	1966-05-24	1966-08-30
1967	1967-06-03	1967-08-16
1968	1968-06-06	1968-08-25
1969	1969-05-17	1969-09-01
1970	1970-05-01	1970-09-25
1971	1971-05-19	1971-09-05
1972	1972-05-23	1972-08-25
1973	1973-06-08	1973-09-04
1974	1974-06-05	1974-08-22
1975	1975-05-20	1975-08-10
1976	1976-04-17	1976-08-22
1977	1977-05-17	1977-09-02
1978	1978-05-28	1978-09-21
1981	1981-05-25	1981-08-11
1982	1982-05-27	1982-09-14
1983	1983-04-29	1983-09-20
1984	1984-05-23	1984-09-25
1985	1985-05-11	1985-09-20
1986	1986-04-29	1986-08-20
1987	1987-04-21	1987-09-10
1988	1988-05-23	1988-09-03
1989	1989-05-17	1989-09-21
1990	1990-04-26	1990-08-27
1991	1991-05-16	1991-09-16
1992	1992-05-21	1992-08-27
1993	1993-05-11	1993-08-31
1994	1994-05-22	1994-08-04
1995	1995-06-01	1995-08-22
1996	1996-05-20	1996-08-23
1997	1997-06-09	1997-08-17
1998	1998-03-31	1998-09-06
2000	2000-05-07	2000-09-01
2002	2002-04-16	2002-09-15
2003	2003-06-23	2003-08-18
2004	2004-04-19	2004-08-29
2005	2005-06-04	2005-09-20
2006	2006-05-26	2006-08-07
2007	2007-05-09	2007-09-26
2008	2008-06-07	2008-09-05
2009	2009-04-25	2009-08-20
2010	2010-05-02	2010-09-24
2011	2011-05-26	2011-09-03
2012	2012-04-16	2012-08-26
2013	2013-05-30	2013-09-12
2014	2014-06-02	2014-09-06
2015	2015-05-10	2015-09-10
2016	2016-05-25	2016-09-09
2017	2017-05-17	2017-09-27
2018	2018-05-02	2018-09-06
2019	2019-06-27	2019-08-21
2020	2020-05-22	2020-09-10
2021	2021-05-20	2021-08-27
2022	2022-05-12	2022-08-31
2023	2023-04-14	2023-09-08
2024	2024-05-22	2024-08-03
2026	2026-05-19	2026-08-09

Every Fixed Threshold

Fixed thresholds at Hanover
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	128	52	1987	19
35 C (95 F): Days	57	17	1988	1
90 F (32.2 C): Days	123	40	1988	6
100 F (37.8 C): Days	3	4	1988	4
0 C (32 F): Ice days (max	128	89	1904	34
0 C (32 F): Frost days (min	130	195	1911	93
-10 C (14 F): Days with min	130	98	1904	33
-20 C (-4 F): Days with min	130	39	1904	10
-30 C (-22 F): Days with min	55	8	1914	1
-40 C (-40 F): Days with min	1	1	1943	1
20 C (68 F): Tropical nights (min	115	18	2018	6
10 mm (0.39 in): Days with 10 mm or more rain	113	54	1983	20
25 mm (0.98 in): Days with 25 mm or more rain	113	17	2006	3
50 mm (1.97 in): Days with 50 mm or more rain	58	5	1924	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1983	1
10 cm (3.9 in): Days with 10 cm or more snowfall	67	14	1956	2
25 cm (9.8 in): Days with 25 cm or more snowfall	32	2	1958	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1958	1

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 Hanover 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Hanover Threshold Days by Year (USC00273850)

Key Facts for Hanover Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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