Hanover Threshold Days by Year (USC00363662)

18 fixed thresholds counted per year at Hanover (USC00363662): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hanover Thresholds

Hanover: days with a maximum temperature at or above 30 C (86 F) in 82 years, most in 1930 with 83.
Hanover: days with a maximum temperature at or above 90 F (32.2 C) in 82 years, most in 1983 with 52.
Hanover: days with a maximum temperature at or below 0 C (32 F) in 82 years, most in 1978 with 42.
Hanover: days with 10 mm (0.39 in) or more of precipitation in 82 years, most in 1975 with 49.
18 fixed thresholds have at least one qualifying day at Hanover.

Days at or above 30 C (86 F)

82 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 83 in 1930.

Days at or above 30 C (86 F) per year at Hanover
Year	Days	Decade average
1905	59	61
1908	70	61
1909	54	61
1910	61	52.4
1911	70	52.4
1912	44	52.4
1913	59	52.4
1914	59	52.4
1915	52	52.4
1916	53	52.4
1917	34	52.4
1918	45	52.4
1919	47	52.4
1920	44	45.9
1921	60	45.9
1922	43	45.9
1923	44	45.9
1924	38	45.9
1925	64	45.9
1926	44	45.9
1927	18	45.9
1929	58	45.9
1930	83	66.4
1931	76	66.4
1932	74	66.4
1933	73	66.4
1934	59	66.4
1935	56	66.4
1936	68	66.4
1937	55	66.4
1938	56	66.4
1939	64	66.4
1940	41	52.6
1941	71	52.6
1942	41	52.6
1943	64	52.6
1944	66	52.6
1945	48	52.6
1946	37	52.6
1947	54	52.6
1948	37	52.6
1949	67	52.6
1950	40	58.2
1951	55	58.2
1952	59	58.2
1953	69	58.2
1954	53	58.2
1955	65	58.2
1956	47	58.2
1957	66	58.2
1958	46	58.2
1959	82	58.2
1960	42	54.5
1961	56	54.5
1962	57	54.5
1963	54	54.5
1964	62	54.5
1965	45	54.5
1966	76	54.5
1967	33	54.5
1968	59	54.5
1969	61	54.5
1970	67	48.7
1971	50	48.7
1972	46	48.7
1973	54	48.7
1974	46	48.7
1975	52	48.7
1976	27	48.7
1977	44	48.7
1978	58	48.7
1979	43	48.7
1980	75	59
1981	48	59
1982	46	59
1983	77	59
1984	61	59
1985	57	59
1986	71	59
1987	58	59
1988	67	59
1989	30	59

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
1905	1905-05-04	1905-10-09
1908	1908-04-23	1908-10-18
1909	1909-05-06	1909-09-14
1910	1910-04-05	1910-10-14
1911	1911-05-10	1911-09-25
1912	1912-05-20	1912-09-15
1913	1913-05-02	1913-09-08
1914	1914-05-12	1914-09-23
1915	1915-04-20	1915-09-17
1916	1916-05-25	1916-10-08
1917	1917-05-18	1917-09-02
1918	1918-05-06	1918-08-25
1919	1919-05-04	1919-10-03
1920	1920-06-01	1920-10-15
1921	1921-04-25	1921-09-29
1922	1922-05-11	1922-10-06
1923	1923-05-29	1923-08-21
1924	1924-05-06	1924-09-02
1925	1925-04-23	1925-09-21
1926	1926-05-02	1926-10-05
1927	1927-06-11	1927-10-01
1929	1929-04-06	1929-09-29
1930	1930-05-01	1930-09-27
1931	1931-05-28	1931-10-08
1932	1932-05-07	1932-09-20
1933	1933-05-20	1933-10-01
1934	1934-05-05	1934-08-24
1935	1935-04-27	1935-09-21
1936	1936-04-30	1936-09-23
1937	1937-04-18	1937-09-04
1938	1938-04-16	1938-10-17
1939	1939-04-25	1939-10-10
1940	1940-05-14	1940-09-22
1941	1941-04-19	1941-10-08
1942	1942-04-06	1942-09-19
1943	1943-05-06	1943-09-06
1944	1944-05-04	1944-09-05
1945	1945-03-29	1945-09-29
1946	1946-04-23	1946-09-27
1947	1947-05-13	1947-10-23
1948	1948-05-11	1948-09-20
1949	1949-05-05	1949-10-12
1950	1950-06-07	1950-10-03
1951	1951-05-17	1951-10-06
1952	1952-06-05	1952-09-15
1953	1953-05-11	1953-10-01
1954	1954-05-03	1954-10-14
1955	1955-05-05	1955-09-16
1956	1956-04-29	1956-09-14
1957	1957-04-22	1957-09-23
1958	1958-05-19	1958-09-27
1959	1959-05-08	1959-10-07
1960	1960-04-15	1960-09-10
1961	1961-05-10	1961-09-26
1962	1962-04-26	1962-09-14
1963	1963-05-06	1963-10-08
1964	1964-05-09	1964-09-24
1965	1965-05-04	1965-09-24
1966	1966-05-22	1966-09-12
1967	1967-06-09	1967-10-05
1968	1968-06-07	1968-09-26
1969	1969-04-28	1969-09-18
1970	1970-05-10	1970-09-27
1971	1971-05-20	1971-09-11
1972	1972-04-20	1972-09-27
1973	1973-04-23	1973-09-06
1974	1974-04-30	1974-09-14
1975	1975-05-21	1975-08-29
1976	1976-04-18	1976-09-15
1977	1977-03-31	1977-09-20
1978	1978-05-21	1978-09-22
1979	1979-05-09	1979-10-23
1980	1980-05-06	1980-09-23
1981	1981-05-23	1981-09-15
1982	1982-05-08	1982-09-14
1983	1983-04-29	1983-10-06
1984	1984-05-21	1984-09-26
1985	1985-04-20	1985-09-11
1986	1986-05-06	1986-10-02
1987	1987-05-11	1987-09-12
1988	1988-05-24	1988-09-24
1989	1989-05-19	1989-09-22

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	82	83	1930	30
35 C (95 F): Days	69	30	1988	1
40 C (104 F): Days	5	2	1918	1
90 F (32.2 C): Days	82	52	1983	11
100 F (37.8 C): Days	24	10	1930	10
0 C (32 F): Ice days (max	82	42	1978	28
0 C (32 F): Frost days (min	79	143	1954	116
-10 C (14 F): Days with min	79	39	1977	20
-20 C (-4 F): Days with min	14	5	1982	5
20 C (68 F): Tropical nights (min	79	43	1931	8
25 C (77 F): Days with min	8	4	1930	1
10 mm (0.39 in): Days with 10 mm or more rain	82	49	1975	33
25 mm (0.98 in): Days with 25 mm or more rain	82	18	1942	6
50 mm (1.97 in): Days with 50 mm or more rain	58	5	1940	1
100 mm (3.94 in): Days with 100 mm or more rain	7	2	1940	1
10 cm (3.9 in): Days with 10 cm or more snowfall	53	7	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	17	3	1958	2
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1983	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Hanover Threshold Days by Year (USC00363662)

Key Facts for Hanover Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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