The Rock Post Office Threshold Days by Year

4 fixed thresholds counted per year at The Rock Post Office (ASN00074104): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for The Rock Post Office Thresholds

The Rock Post Office: days with 10 mm (0.39 in) or more of precipitation in 106 years, most in 1894 with 34.
The Rock Post Office: days with 25 mm (0.98 in) or more of precipitation in 99 years, most in 1973 with 12.
The Rock Post Office: days with 50 mm (1.97 in) or more of precipitation in 38 years, most in 1955 with 3.
The Rock Post Office: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 2012 with 1.
4 fixed thresholds have at least one qualifying day at The Rock Post Office.

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

106 years with a qualifying day

Days per year at The Rock Post Office with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 34 in 1894.

Days with 10 mm (0.39 in) or more of precipitation per year at The Rock Post Office
Year	Days	Decade average
1894	34	17.5
1895	16	17.5
1896	15	17.5
1897	11	17.5
1898	14	17.5
1899	15	17.5
1900	23	14.5
1901	15	14.5
1902	8	14.5
1903	10	14.5
1904	17	14.5
1905	14	14.5
1910	18	16.5
1911	22	16.5
1912	11	16.5
1913	16	16.5
1914	8	16.5
1915	14	16.5
1916	27	16.5
1917	23	16.5
1918	16	16.5
1919	10	16.5
1920	17	16.9
1921	17	16.9
1922	13	16.9
1923	15	16.9
1924	25	16.9
1925	19	16.9
1926	18	16.9
1927	13	16.9
1928	21	16.9
1929	11	16.9
1930	19	19.3
1931	25	19.3
1932	17	19.3
1933	17	19.3
1934	22	19.3
1935	19	19.3
1936	21	19.3
1937	17	19.3
1938	9	19.3
1939	27	19.3
1940	8	15.7
1941	14	15.7
1942	23	15.7
1943	14	15.7
1944	7	15.7
1945	13	15.7
1946	19	15.7
1947	23	15.7
1948	18	15.7
1949	18	15.7
1950	27	20.2
1951	16	20.2
1952	26	20.2
1953	18	20.2
1954	18	20.2
1955	19	20.2
1956	33	20.2
1957	12	20.2
1958	21	20.2
1959	12	20.2
1960	21	15.7
1961	19	15.7
1962	17	15.7
1963	16	15.7
1964	14	15.7
1965	8	15.7
1966	18	15.7
1967	7	15.7
1968	17	15.7
1969	20	15.7
1970	27	14.4
1971	11	14.4
1972	9	14.4
1973	28	14.4
1976	9	14.4
1977	6	14.4
1979	11	14.4
1982	5	10.5
1988	16	10.5
1994	9	9.5
1998	10	9.5
2000	16	11.9
2001	15	11.9
2002	9	11.9
2003	9	11.9
2004	13	11.9
2005	13	11.9
2006	10	11.9
2007	15	11.9
2008	10	11.9
2009	9	11.9
2011	26	16.7
2012	18	16.7
2013	17	16.7
2015	15	16.7
2016	26	16.7
2018	10	16.7
2019	5	16.7
2020	19	19
2021	22	19
2022	30	19
2023	20	19
2024	16	19
2025	7	19

For each year, a bar from the first to the last day at The Rock Post Office meeting 10 mm (0.39 in).

First to last qualifying date each year at The Rock Post Office
Year	First date	Last date
1894	1894-01-26	1894-12-28
1895	1895-01-01	1895-12-11
1896	1896-01-15	1896-11-19
1897	1897-01-09	1897-12-20
1898	1898-02-13	1898-12-24
1899	1899-01-23	1899-11-07
1900	1900-01-21	1900-11-18
1901	1901-04-04	1901-11-12
1902	1902-01-05	1902-12-19
1903	1903-03-12	1903-10-22
1904	1904-01-02	1904-12-18
1905	1905-01-17	1905-12-03
1910	1910-01-11	1910-12-01
1911	1911-01-06	1911-12-05
1912	1912-06-10	1912-12-26
1913	1913-01-03	1913-12-31
1914	1914-03-25	1914-12-15
1915	1915-02-20	1915-10-23
1916	1916-03-07	1916-12-09
1917	1917-01-23	1917-12-13
1918	1918-01-11	1918-10-24
1919	1919-02-18	1919-12-28
1920	1920-01-17	1920-12-10
1921	1921-01-03	1921-12-23
1922	1922-01-09	1922-12-31
1923	1923-05-10	1923-10-13
1924	1924-01-03	1924-12-15
1925	1925-01-13	1925-11-20
1926	1926-03-21	1926-12-18
1927	1927-01-06	1927-12-10
1928	1928-01-14	1928-12-23
1929	1929-02-17	1929-12-28
1930	1930-01-24	1930-12-25
1931	1931-02-15	1931-11-16
1932	1932-02-06	1932-11-14
1933	1933-01-21	1933-12-27
1934	1934-01-07	1934-12-01
1935	1935-02-08	1935-12-25
1936	1936-01-04	1936-12-19
1937	1937-01-19	1937-12-29
1938	1938-02-05	1938-10-24
1939	1939-02-27	1939-11-16
1940	1940-04-04	1940-12-30
1941	1941-01-03	1941-10-06
1942	1942-02-14	1942-11-06
1943	1943-01-04	1943-11-18
1944	1944-03-22	1944-12-13
1945	1945-01-15	1945-11-17
1946	1946-01-17	1946-11-19
1947	1947-02-06	1947-12-26
1948	1948-01-02	1948-12-29
1949	1949-03-07	1949-11-18
1950	1950-01-18	1950-12-22
1951	1951-01-25	1951-11-27
1952	1952-03-22	1952-12-11
1953	1953-01-06	1953-11-08
1954	1954-01-29	1954-12-11
1955	1955-02-10	1955-12-26
1956	1956-01-03	1956-11-10
1957	1957-02-08	1957-12-31
1958	1958-02-19	1958-12-17
1959	1959-02-12	1959-10-05
1960	1960-01-04	1960-12-03
1961	1961-01-02	1961-12-16
1962	1962-01-18	1962-12-31
1963	1963-01-03	1963-11-07
1964	1964-01-09	1964-12-23
1965	1965-05-31	1965-12-01
1966	1966-01-30	1966-12-07
1967	1967-03-03	1967-10-12
1968	1968-01-05	1968-12-27
1969	1969-01-15	1969-12-12
1970	1970-01-02	1970-12-10
1971	1971-02-02	1971-12-21
1972	1972-01-05	1972-10-17
1973	1973-01-13	1973-12-30
1976	1976-02-24	1976-11-16
1977	1977-02-23	1977-11-30
1979	1979-01-22	1979-10-23
1982	1982-01-26	1982-04-27
1988	1988-01-01	1988-12-26
1994	1994-02-11	1994-12-23
1998	1998-02-08	1998-12-15
2000	2000-01-27	2000-10-25
2001	2001-02-13	2001-11-07
2002	2002-02-04	2002-09-17
2003	2003-02-21	2003-10-02
2004	2004-01-07	2004-12-14
2005	2005-02-03	2005-12-03
2006	2006-03-16	2006-11-13
2007	2007-02-27	2007-12-22
2008	2008-02-04	2008-12-13
2009	2009-03-14	2009-12-25
2011	2011-01-10	2011-12-26
2012	2012-01-30	2012-11-28
2013	2013-02-28	2013-12-05
2015	2015-01-09	2015-10-12
2016	2016-01-23	2016-12-16
2018	2018-01-27	2018-11-07
2019	2019-03-29	2019-11-04
2020	2020-01-14	2020-10-31
2021	2021-01-27	2021-12-20
2022	2022-01-06	2022-12-30
2023	2023-01-18	2023-12-30
2024	2024-01-03	2024-12-07
2025	2025-01-08	2025-11-04

Every Fixed Threshold

Fixed thresholds at The Rock Post Office
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	106	34	1894	7
25 mm (0.98 in): Days with 25 mm or more rain	99	12	1973	3
50 mm (1.97 in): Days with 50 mm or more rain	38	3	1955	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	2012	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.

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Data for The Rock Post Office 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).

The Rock Post Office Threshold Days by Year

Key Facts for The Rock Post Office Thresholds

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

Every Fixed Threshold

Download the Data

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