Hanover (Pol) Threshold Days by Year (SF001437840)

4 fixed thresholds counted per year at Hanover (Pol) (SF001437840): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hanover (Pol) Thresholds

Hanover (Pol): days with 10 mm (0.39 in) or more of precipitation in 92 years, most in 1988 with 26.
Hanover (Pol): days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1950 with 9.
Hanover (Pol): days with 50 mm (1.97 in) or more of precipitation in 26 years, most in 1974 with 3.
Hanover (Pol): days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1918 with 1.
4 fixed thresholds have at least one qualifying day at Hanover (Pol).

Days with 10 mm (0.39 in) or more of precipitation

92 years with a qualifying day

Days per year at Hanover (Pol) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1988.

Days with 10 mm (0.39 in) or more of precipitation per year at Hanover (Pol)
Year	Days	Decade average
1879	11	11
1880	13	11.6
1881	15	11.6
1882	12	11.6
1884	9	11.6
1885	6	11.6
1886	12	11.6
1887	15	11.6
1888	14	11.6
1889	8	11.6
1891	21	16.5
1893	12	16.5
1903	1	9.4
1904	6	9.4
1905	10	9.4
1906	15	9.4
1907	15	9.4
1912	3	7.8
1915	5	7.8
1916	6	7.8
1917	14	7.8
1918	13	7.8
1919	6	7.8
1920	13	9.6
1921	13	9.6
1922	4	9.6
1923	11	9.6
1924	8	9.6
1925	16	9.6
1926	4	9.6
1927	2	9.6
1928	10	9.6
1929	15	9.6
1930	8	10.2
1931	10	10.2
1932	7	10.2
1933	5	10.2
1934	15	10.2
1935	16	10.2
1936	9	10.2
1937	4	10.2
1938	11	10.2
1939	17	10.2
1940	11	10
1941	10	10
1942	14	10
1944	8	10
1945	5	10
1946	14	10
1947	9	10
1948	12	10
1949	7	10
1950	18	12.4
1951	7	12.4
1952	10	12.4
1953	13	12.4
1954	13	12.4
1955	14	12.4
1956	15	12.4
1957	13	12.4
1958	13	12.4
1959	8	12.4
1960	13	11.3
1961	17	11.3
1962	11	11.3
1963	14	11.3
1964	9	11.3
1965	11	11.3
1966	5	11.3
1967	18	11.3
1968	7	11.3
1969	8	11.3
1970	7	11.7
1971	11	11.7
1972	10	11.7
1973	12	11.7
1974	20	11.7
1975	14	11.7
1976	17	11.7
1977	6	11.7
1978	8	11.7
1979	12	11.7
1980	11	13.5
1981	20	13.5
1982	9	13.5
1983	10	13.5
1984	8	13.5
1985	14	13.5
1986	8	13.5
1987	16	13.5
1988	26	13.5
1989	13	13.5

For each year, a bar from the first to the last day at Hanover (Pol) meeting 10 mm (0.39 in).

First to last qualifying date each year at Hanover (Pol)
Year	First date	Last date
1879	1879-01-07	1879-12-28
1880	1880-01-11	1880-12-13
1881	1881-01-02	1881-06-08
1882	1882-01-02	1882-12-27
1884	1884-01-04	1884-06-12
1885	1885-02-16	1885-11-02
1886	1886-01-16	1886-12-20
1887	1887-02-03	1887-11-20
1888	1888-01-20	1888-09-21
1889	1889-01-02	1889-11-03
1891	1891-01-21	1891-12-13
1893	1893-03-03	1893-12-14
1903	1903-11-15	1903-11-15
1904	1904-01-09	1904-10-25
1905	1905-01-13	1905-12-13
1906	1906-01-06	1906-12-29
1907	1907-01-05	1907-12-14
1912	1912-02-14	1912-12-05
1915	1915-02-14	1915-11-12
1916	1916-03-02	1916-10-18
1917	1917-01-19	1917-12-18
1918	1918-01-01	1918-10-29
1919	1919-03-02	1919-11-22
1920	1920-01-28	1920-12-18
1921	1921-02-04	1921-12-09
1922	1922-01-10	1922-11-22
1923	1923-01-26	1923-05-13
1924	1924-01-25	1924-12-15
1925	1925-01-30	1925-12-05
1926	1926-03-05	1926-11-26
1927	1927-02-02	1927-10-15
1928	1928-01-03	1928-11-23
1929	1929-01-18	1929-12-28
1930	1930-01-15	1930-11-12
1931	1931-01-29	1931-12-31
1932	1932-01-01	1932-09-17
1933	1933-04-03	1933-12-27
1934	1934-01-02	1934-12-20
1935	1935-02-04	1935-12-15
1936	1936-02-26	1936-11-17
1937	1937-04-06	1937-12-17
1938	1938-01-28	1938-11-04
1939	1939-01-02	1939-12-14
1940	1940-02-15	1940-11-08
1941	1941-01-04	1941-12-22
1942	1942-02-28	1942-12-20
1944	1944-02-10	1944-10-28
1945	1945-01-31	1945-07-12
1946	1946-01-18	1946-12-19
1947	1947-02-09	1947-12-04
1948	1948-01-25	1948-04-20
1949	1949-03-05	1949-12-18
1950	1950-01-08	1950-12-07
1951	1951-01-01	1951-10-03
1952	1952-02-04	1952-11-24
1953	1953-02-07	1953-12-19
1954	1954-01-18	1954-11-19
1955	1955-01-25	1955-12-17
1956	1956-01-14	1956-12-23
1957	1957-01-11	1957-12-27
1958	1958-01-13	1958-12-30
1959	1959-01-24	1959-11-08
1960	1960-02-13	1960-12-12
1961	1961-01-03	1961-12-15
1962	1962-01-18	1962-12-03
1963	1963-01-17	1963-12-09
1964	1964-03-25	1964-12-07
1965	1965-01-21	1965-08-30
1966	1966-01-16	1966-12-18
1967	1967-01-12	1967-11-23
1968	1968-03-13	1968-12-22
1969	1969-02-26	1969-11-06
1970	1970-02-06	1970-12-04
1971	1971-01-25	1971-10-15
1972	1972-01-03	1972-06-13
1973	1973-02-18	1973-12-22
1974	1974-01-16	1974-11-08
1975	1975-01-26	1975-12-19
1976	1976-01-21	1976-10-31
1977	1977-01-29	1977-12-30
1978	1978-01-04	1978-09-24
1979	1979-01-29	1979-11-18
1980	1980-01-20	1980-12-13
1981	1981-01-25	1981-11-25
1982	1982-03-03	1982-12-05
1983	1983-01-16	1983-12-21
1984	1984-04-04	1984-11-28
1985	1985-01-14	1985-12-19
1986	1986-01-19	1986-11-21
1987	1987-02-07	1987-12-22
1988	1988-01-14	1988-12-31
1989	1989-01-05	1989-11-15

Every Fixed Threshold

Fixed thresholds at Hanover (Pol)
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	92	26	1988	13
25 mm (0.98 in): Days with 25 mm or more rain	79	9	1950	4
50 mm (1.97 in): Days with 50 mm or more rain	26	3	1974	3
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1879.

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Data for Hanover (Pol) 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 (Pol) Threshold Days by Year (SF001437840)

Key Facts for Hanover (Pol) Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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