Alpha Post Office Threshold Days by Year (ASN00035000)

4 fixed thresholds counted per year at Alpha Post Office (ASN00035000): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alpha Post Office Thresholds

Alpha Post Office: days with 10 mm (0.39 in) or more of precipitation in 126 years, most in 2010 with 46.
Alpha Post Office: days with 25 mm (0.98 in) or more of precipitation in 125 years, most in 1950 with 18.
Alpha Post Office: days with 50 mm (1.97 in) or more of precipitation in 87 years, most in 1956 with 7.
Alpha Post Office: days with 100 mm (3.94 in) or more of precipitation in 24 years, most in 1956 with 3.
4 fixed thresholds have at least one qualifying day at Alpha Post Office.

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

126 years with a qualifying day

Days per year at Alpha Post Office with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 46 in 2010.

Days with 10 mm (0.39 in) or more of precipitation per year at Alpha Post Office
Year	Days	Decade average
1888	11	15.5
1889	20	15.5
1890	30	18.3
1891	24	18.3
1892	9	18.3
1893	16	18.3
1894	17	18.3
1895	14	18.3
1896	21	18.3
1897	15	18.3
1898	18	18.3
1899	19	18.3
1900	13	17.2
1901	13	17.2
1902	9	17.2
1903	19	17.2
1904	18	17.2
1905	13	17.2
1906	29	17.2
1907	22	17.2
1908	20	17.2
1909	16	17.2
1910	21	15.9
1911	12	15.9
1912	14	15.9
1913	16	15.9
1914	12	15.9
1915	9	15.9
1916	24	15.9
1917	23	15.9
1918	16	15.9
1919	12	15.9
1920	22	15.8
1921	20	15.8
1922	18	15.8
1923	12	15.8
1924	21	15.8
1925	12	15.8
1926	12	15.8
1927	11	15.8
1928	19	15.8
1929	11	15.8
1930	15	13.8
1931	13	13.8
1932	11	13.8
1933	18	13.8
1934	11	13.8
1935	13	13.8
1936	17	13.8
1937	7	13.8
1938	19	13.8
1939	14	13.8
1940	14	14.4
1941	23	14.4
1942	19	14.4
1943	15	14.4
1944	12	14.4
1945	12	14.4
1946	8	14.4
1947	17	14.4
1948	8	14.4
1949	16	14.4
1950	34	21.7
1951	15	21.7
1952	12	21.7
1953	15	21.7
1954	27	21.7
1955	20	21.7
1956	34	21.7
1957	14	21.7
1958	22	21.7
1959	24	21.7
1960	18	14.7
1961	20	14.7
1962	16	14.7
1963	16	14.7
1964	10	14.7
1965	15	14.7
1966	13	14.7
1967	10	14.7
1968	17	14.7
1969	12	14.7
1970	16	17.3
1971	12	17.3
1972	9	17.3
1973	21	17.3
1974	24	17.3
1975	18	17.3
1976	18	17.3
1977	19	17.3
1978	19	17.3
1980	14	15.7
1981	21	15.7
1982	9	15.7
1983	22	15.7
1984	27	15.7
1985	15	15.7
1986	13	15.7
1987	15	15.7
1988	5	15.7
1990	12	11
1991	5	11
1993	10	11
1994	8	11
1995	12	11
1996	11	11
1998	15	11
1999	15	11
2000	17	14.3
2001	12	14.3
2002	6	14.3
2003	10	14.3
2004	17	14.3
2005	13	14.3
2006	12	14.3
2007	21	14.3
2008	19	14.3
2009	16	14.3
2010	46	21.5
2011	18	21.5
2012	25	21.5
2013	8	21.5
2014	18	21.5
2015	14	21.5
2020	7	6.5
2025	6	6.5

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

First to last qualifying date each year at Alpha Post Office
Year	First date	Last date
1888	1888-01-24	1888-11-25
1889	1889-01-22	1889-12-18
1890	1890-01-05	1890-12-18
1891	1891-01-12	1891-12-27
1892	1892-01-15	1892-11-11
1893	1893-01-10	1893-12-22
1894	1894-01-05	1894-12-10
1895	1895-01-09	1895-12-06
1896	1896-01-28	1896-12-06
1897	1897-01-05	1897-12-25
1898	1898-01-07	1898-12-22
1899	1899-01-04	1899-11-26
1900	1900-01-10	1900-12-22
1901	1901-02-03	1901-09-29
1902	1902-01-23	1902-12-17
1903	1903-01-25	1903-12-12
1904	1904-01-03	1904-12-17
1905	1905-01-12	1905-11-30
1906	1906-01-01	1906-11-29
1907	1907-01-08	1907-12-30
1908	1908-02-03	1908-11-28
1909	1909-01-16	1909-12-22
1910	1910-01-12	1910-12-13
1911	1911-01-09	1911-10-04
1912	1912-01-26	1912-10-25
1913	1913-01-05	1913-12-29
1914	1914-02-02	1914-12-25
1915	1915-02-13	1915-12-28
1916	1916-01-13	1916-12-31
1917	1917-01-01	1917-12-25
1918	1918-01-02	1918-12-06
1919	1919-01-29	1919-12-03
1920	1920-01-05	1920-12-08
1921	1921-01-15	1921-12-30
1922	1922-01-14	1922-12-21
1923	1923-01-02	1923-12-27
1924	1924-02-19	1924-12-17
1925	1925-01-04	1925-11-10
1926	1926-01-02	1926-12-25
1927	1927-01-21	1927-12-23
1928	1928-01-17	1928-12-24
1929	1929-01-22	1929-12-31
1930	1930-01-27	1930-12-09
1931	1931-01-14	1931-12-10
1932	1932-03-19	1932-12-22
1933	1933-01-26	1933-12-17
1934	1934-01-27	1934-12-21
1935	1935-01-05	1935-12-30
1936	1936-01-07	1936-12-28
1937	1937-02-10	1937-12-15
1938	1938-01-06	1938-11-08
1939	1939-01-23	1939-12-23
1940	1940-02-02	1940-12-21
1941	1941-01-04	1941-12-11
1942	1942-01-18	1942-12-29
1943	1943-01-02	1943-12-19
1944	1944-02-08	1944-12-28
1945	1945-01-11	1945-12-08
1946	1946-01-19	1946-11-18
1947	1947-01-11	1947-12-11
1948	1948-01-02	1948-12-31
1949	1949-01-10	1949-10-24
1950	1950-01-17	1950-11-24
1951	1951-01-02	1951-12-25
1952	1952-02-14	1952-10-27
1953	1953-01-12	1953-12-29
1954	1954-01-15	1954-11-10
1955	1955-01-09	1955-12-19
1956	1956-01-19	1956-12-25
1957	1957-01-07	1957-11-02
1958	1958-01-04	1958-12-29
1959	1959-01-12	1959-12-26
1960	1960-01-07	1960-12-24
1961	1961-01-03	1961-12-20
1962	1962-01-03	1962-12-28
1963	1963-01-17	1963-11-30
1964	1964-02-09	1964-11-14
1965	1965-01-08	1965-12-20
1966	1966-01-06	1966-11-09
1967	1967-01-18	1967-12-22
1968	1968-01-05	1968-07-18
1969	1969-01-11	1969-12-24
1970	1970-01-13	1970-12-17
1971	1971-01-31	1971-12-24
1972	1972-01-06	1972-12-09
1973	1973-01-10	1973-12-27
1974	1974-01-02	1974-12-29
1975	1975-01-03	1975-12-23
1976	1976-01-12	1976-12-27
1977	1977-01-03	1977-12-22
1978	1978-01-16	1978-12-10
1980	1980-01-10	1980-12-15
1981	1981-01-18	1981-12-25
1982	1982-01-05	1982-12-21
1983	1983-01-03	1983-12-03
1984	1984-01-01	1984-12-20
1985	1985-01-06	1985-12-10
1986	1986-02-05	1986-12-02
1987	1987-01-05	1987-12-31
1988	1988-01-25	1988-12-23
1990	1990-01-16	1990-12-28
1991	1991-05-22	1991-12-12
1993	1993-02-25	1993-12-18
1994	1994-02-02	1994-12-05
1995	1995-01-04	1995-12-05
1996	1996-01-09	1996-12-13
1998	1998-01-26	1998-11-13
1999	1999-01-02	1999-12-19
2000	2000-02-15	2000-12-29
2001	2001-01-23	2001-12-17
2002	2002-01-09	2002-12-22
2003	2003-02-08	2003-12-15
2004	2004-01-10	2004-12-17
2005	2005-01-05	2005-10-28
2006	2006-01-13	2006-11-04
2007	2007-01-01	2007-12-28
2008	2008-01-17	2008-12-28
2009	2009-01-24	2009-12-31
2010	2010-01-05	2010-12-27
2011	2011-01-20	2011-12-16
2012	2012-01-15	2012-12-28
2013	2013-02-19	2013-12-12
2014	2014-01-26	2014-12-19
2015	2015-01-07	2015-12-29
2020	2020-02-06	2020-12-29
2025	2025-01-01	2025-03-28

Every Fixed Threshold

Fixed thresholds at Alpha 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	126	46	2010	6
25 mm (0.98 in): Days with 25 mm or more rain	125	18	1950	2
50 mm (1.97 in): Days with 50 mm or more rain	87	7	1956	2
100 mm (3.94 in): Days with 100 mm or more rain	24	3	1956	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1888.

Download the Data

Data for Alpha 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).

Alpha Post Office Threshold Days by Year (ASN00035000)

Key Facts for Alpha Post Office Thresholds

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

Every Fixed Threshold

Download the Data

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