Hamakuapoko 485 Threshold Days by Year (USC00511086)

5 fixed thresholds counted per year at Hamakuapoko 485 (USC00511086): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamakuapoko 485 Thresholds

Hamakuapoko 485: days with 10 mm (0.39 in) or more of precipitation in 74 years, most in 1950 with 55.
Hamakuapoko 485: days with 25 mm (0.98 in) or more of precipitation in 74 years, most in 1950 with 17.
Hamakuapoko 485: days with 50 mm (1.97 in) or more of precipitation in 63 years, most in 1950 with 8.
Hamakuapoko 485: days with 100 mm (3.94 in) or more of precipitation in 11 years, most in 1968 with 2.
5 fixed thresholds have at least one qualifying day at Hamakuapoko 485.

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

74 years with a qualifying day

Days per year at Hamakuapoko 485 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1950.

Days with 10 mm (0.39 in) or more of precipitation per year at Hamakuapoko 485
Year	Days	Decade average
1942	37	32.3
1943	33	32.3
1944	30	32.3
1945	22	32.3
1946	35	32.3
1947	32	32.3
1948	42	32.3
1949	27	32.3
1950	55	35.9
1951	26	35.9
1952	36	35.9
1953	15	35.9
1954	35	35.9
1955	38	35.9
1956	36	35.9
1957	45	35.9
1958	41	35.9
1959	32	35.9
1960	30	31.7
1961	27	31.7
1962	21	31.7
1963	27	31.7
1964	25	31.7
1965	36	31.7
1966	23	31.7
1967	38	31.7
1968	36	31.7
1969	54	31.7
1970	36	29.6
1971	28	29.6
1972	17	29.6
1973	32	29.6
1974	29	29.6
1975	25	29.6
1976	26	29.6
1977	27	29.6
1978	39	29.6
1979	37	29.6
1980	46	33.4
1981	26	33.4
1982	39	33.4
1983	19	33.4
1984	17	33.4
1985	30	33.4
1986	36	33.4
1987	37	33.4
1988	34	33.4
1989	50	33.4
1990	45	32.1
1991	23	32.1
1992	35	32.1
1993	28	32.1
1994	30	32.1
1995	25	32.1
1996	29	32.1
1997	43	32.1
1998	26	32.1
1999	37	32.1
2000	29	26.7
2001	23	26.7
2002	23	26.7
2003	25	26.7
2004	33	26.7
2005	43	26.7
2006	22	26.7
2007	24	26.7
2008	19	26.7
2009	26	26.7
2010	20	29.8
2011	23	29.8
2012	32	29.8
2013	26	29.8
2014	39	29.8
2015	39	29.8

For each year, a bar from the first to the last day at Hamakuapoko 485 meeting 10 mm (0.39 in).

First to last qualifying date each year at Hamakuapoko 485
Year	First date	Last date
1942	1942-01-14	1942-12-29
1943	1943-01-02	1943-12-27
1944	1944-02-12	1944-12-26
1945	1945-02-14	1945-12-06
1946	1946-01-10	1946-12-25
1947	1947-01-11	1947-12-18
1948	1948-01-02	1948-12-28
1949	1949-01-09	1949-12-28
1950	1950-01-02	1950-12-30
1951	1951-01-01	1951-12-14
1952	1952-01-01	1952-12-18
1953	1953-01-07	1953-12-29
1954	1954-02-24	1954-12-31
1955	1955-01-22	1955-12-31
1956	1956-01-13	1956-12-31
1957	1957-01-09	1957-12-29
1958	1958-01-24	1958-12-30
1959	1959-01-09	1959-12-28
1960	1960-01-05	1960-12-29
1961	1961-01-02	1961-12-24
1962	1962-01-08	1962-12-18
1963	1963-01-08	1963-12-18
1964	1964-01-01	1964-12-22
1965	1965-01-14	1965-12-18
1966	1966-01-06	1966-12-29
1967	1967-01-02	1967-12-31
1968	1968-01-04	1968-12-29
1969	1969-01-04	1969-12-30
1970	1970-01-07	1970-12-28
1971	1971-01-05	1971-12-14
1972	1972-02-05	1972-12-20
1973	1973-01-07	1973-12-30
1974	1974-01-04	1974-12-27
1975	1975-01-04	1975-11-25
1976	1976-01-03	1976-11-25
1977	1977-01-05	1977-12-18
1978	1978-01-01	1978-12-12
1979	1979-01-10	1979-12-30
1980	1980-01-01	1980-12-15
1981	1981-02-06	1981-12-26
1982	1982-01-08	1982-12-29
1983	1983-03-13	1983-12-27
1984	1984-01-13	1984-12-27
1985	1985-01-15	1985-12-11
1986	1986-01-07	1986-12-30
1987	1987-01-14	1987-12-20
1988	1988-01-01	1988-12-31
1989	1989-01-07	1989-12-21
1990	1990-01-01	1990-12-25
1991	1991-01-07	1991-12-26
1992	1992-01-02	1992-12-31
1993	1993-01-01	1993-12-19
1994	1994-01-17	1994-12-15
1995	1995-01-13	1995-12-31
1996	1996-01-01	1996-12-28
1997	1997-01-01	1997-12-31
1998	1998-01-01	1998-12-21
1999	1999-01-01	1999-12-27
2000	2000-01-10	2000-12-21
2001	2001-02-04	2001-12-19
2002	2002-01-19	2002-12-27
2003	2003-01-12	2003-12-13
2004	2004-01-02	2004-12-29
2005	2005-01-02	2005-12-08
2006	2006-01-02	2006-12-02
2007	2007-02-08	2007-12-31
2008	2008-01-02	2008-12-30
2009	2009-01-16	2009-12-20
2010	2010-01-27	2010-12-26
2011	2011-01-12	2011-12-25
2012	2012-02-12	2012-12-21
2013	2013-01-02	2013-12-30
2014	2014-01-03	2014-12-31
2015	2015-01-03	2015-12-27

Every Fixed Threshold

Fixed thresholds at Hamakuapoko 485
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	74	55	1950	39
25 mm (0.98 in): Days with 25 mm or more rain	74	17	1950	14
50 mm (1.97 in): Days with 50 mm or more rain	63	8	1950	2
100 mm (3.94 in): Days with 100 mm or more rain	11	2	1968	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1971	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1942.

Download the Data

Data for Hamakuapoko 485 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).

Hamakuapoko 485 Threshold Days by Year (USC00511086)

Key Facts for Hamakuapoko 485 Thresholds

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

Every Fixed Threshold

Download the Data

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