Happy Valley Reservoir Threshold Days by Year

3 fixed thresholds counted per year at Happy Valley Reservoir (ASN00023721): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Happy Valley Reservoir Thresholds

Happy Valley Reservoir: days with 10 mm (0.39 in) or more of precipitation in 134 years, most in 1992 with 35.
Happy Valley Reservoir: days with 25 mm (0.98 in) or more of precipitation in 122 years, most in 1963 with 7.
Happy Valley Reservoir: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 1993 with 2.
3 fixed thresholds have at least one qualifying day at Happy Valley Reservoir.

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

134 years with a qualifying day

Days per year at Happy Valley Reservoir with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1992.

Days with 10 mm (0.39 in) or more of precipitation per year at Happy Valley Reservoir
Year	Days	Decade average
1892	16	16.1
1893	20	16.1
1894	17	16.1
1895	19	16.1
1896	14	16.1
1897	10	16.1
1898	17	16.1
1899	16	16.1
1900	21	18.6
1901	13	18.6
1902	13	18.6
1903	23	18.6
1904	16	18.6
1905	17	18.6
1906	22	18.6
1907	12	18.6
1908	20	18.6
1909	29	18.6
1910	23	16.3
1912	14	16.3
1913	11	16.3
1914	7	16.3
1915	16	16.3
1916	25	16.3
1917	27	16.3
1918	15	16.3
1919	9	16.3
1920	20	21.6
1921	24	21.6
1922	28	21.6
1923	28	21.6
1924	20	21.6
1925	14	21.6
1926	24	21.6
1927	19	21.6
1928	24	21.6
1929	15	21.6
1930	11	15.1
1931	16	15.1
1932	15	15.1
1933	14	15.1
1934	10	15.1
1935	19	15.1
1936	13	15.1
1937	20	15.1
1938	14	15.1
1939	19	15.1
1940	9	17.5
1941	18	17.5
1942	30	17.5
1943	16	17.5
1944	13	17.5
1945	18	17.5
1946	16	17.5
1947	19	17.5
1948	18	17.5
1949	18	17.5
1950	12	17.1
1951	19	17.1
1952	15	17.1
1953	21	17.1
1954	15	17.1
1955	26	17.1
1956	25	17.1
1957	10	17.1
1958	18	17.1
1959	10	17.1
1960	21	16.8
1961	14	16.8
1962	13	16.8
1963	25	16.8
1964	14	16.8
1965	12	16.8
1966	18	16.8
1967	8	16.8
1968	26	16.8
1969	17	16.8
1970	17	20.8
1971	30	20.8
1972	15	20.8
1973	20	20.8
1974	24	20.8
1975	21	20.8
1976	15	20.8
1977	13	20.8
1978	24	20.8
1979	29	20.8
1980	18	20.6
1981	30	20.6
1982	16	20.6
1983	26	20.6
1984	21	20.6
1985	17	20.6
1986	21	20.6
1987	24	20.6
1988	19	20.6
1989	14	20.6
1990	16	19.4
1991	17	19.4
1992	35	19.4
1993	14	19.4
1994	12	19.4
1995	18	19.4
1996	24	19.4
1997	17	19.4
1998	17	19.4
1999	24	19.4
2000	24	18.3
2001	28	18.3
2002	11	18.3
2003	20	18.3
2004	18	18.3
2005	21	18.3
2006	14	18.3
2007	16	18.3
2008	10	18.3
2009	21	18.3
2010	24	19.1
2011	22	19.1
2012	19	19.1
2013	17	19.1
2014	12	19.1
2015	12	19.1
2016	28	19.1
2017	27	19.1
2018	15	19.1
2019	15	19.1
2020	21	20
2021	21	20
2022	24	20
2023	18	20
2024	13	20
2025	21	20
2026	22	20

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

First to last qualifying date each year at Happy Valley Reservoir
Year	First date	Last date
1892	1892-01-23	1892-12-11
1893	1893-03-31	1893-11-12
1894	1894-01-13	1894-12-26
1895	1895-01-04	1895-11-30
1896	1896-01-13	1896-12-28
1897	1897-01-09	1897-09-29
1898	1898-03-01	1898-10-07
1899	1899-02-28	1899-11-06
1900	1900-01-29	1900-12-03
1901	1901-04-03	1901-12-31
1902	1902-03-25	1902-12-17
1903	1903-01-21	1903-12-11
1904	1904-01-02	1904-11-02
1905	1905-01-03	1905-10-28
1906	1906-03-24	1906-12-17
1907	1907-04-05	1907-11-23
1908	1908-02-08	1908-12-21
1909	1909-03-06	1909-11-13
1910	1910-03-05	1910-11-19
1912	1912-04-17	1912-12-07
1913	1913-02-14	1913-12-23
1914	1914-03-13	1914-11-25
1915	1915-04-09	1915-09-14
1916	1916-03-27	1916-11-16
1917	1917-02-14	1917-12-12
1918	1918-02-18	1918-10-07
1919	1919-02-16	1919-12-27
1920	1920-03-06	1920-12-27
1921	1921-01-02	1921-12-03
1922	1922-01-05	1922-12-26
1923	1923-05-08	1923-12-15
1924	1924-02-17	1924-11-07
1925	1925-02-07	1925-09-28
1926	1926-02-25	1926-12-26
1927	1927-02-03	1927-12-03
1928	1928-02-01	1928-10-26
1929	1929-04-25	1929-12-28
1930	1930-06-29	1930-11-17
1931	1931-03-13	1931-11-16
1932	1932-02-05	1932-10-12
1933	1933-01-20	1933-09-17
1934	1934-06-26	1934-12-09
1935	1935-03-14	1935-11-11
1936	1936-02-19	1936-12-17
1937	1937-01-19	1937-12-11
1938	1938-01-03	1938-08-28
1939	1939-01-16	1939-11-05
1940	1940-01-05	1940-12-19
1941	1941-01-24	1941-12-07
1942	1942-01-20	1942-11-22
1943	1943-02-17	1943-10-09
1944	1944-02-08	1944-12-21
1945	1945-01-31	1945-12-17
1946	1946-01-17	1946-12-25
1947	1947-02-04	1947-12-23
1948	1948-04-09	1948-12-25
1949	1949-02-20	1949-11-21
1950	1950-02-01	1950-12-20
1951	1951-02-22	1951-12-31
1952	1952-01-25	1952-11-27
1953	1953-01-25	1953-12-07
1954	1954-01-27	1954-12-12
1955	1955-02-09	1955-12-03
1956	1956-01-02	1956-10-18
1957	1957-03-14	1957-10-23
1958	1958-03-27	1958-10-11
1959	1959-02-13	1959-12-26
1960	1960-02-01	1960-11-12
1961	1961-02-08	1961-08-20
1962	1962-02-20	1962-10-19
1963	1963-01-13	1963-10-28
1964	1964-04-08	1964-11-18
1965	1965-04-16	1965-11-25
1966	1966-03-16	1966-12-04
1967	1967-02-23	1967-08-13
1968	1968-01-20	1968-12-23
1969	1969-02-09	1969-12-01
1970	1970-01-01	1970-12-05
1971	1971-03-15	1971-12-10
1972	1972-02-15	1972-12-27
1973	1973-01-30	1973-12-02
1974	1974-01-28	1974-10-24
1975	1975-01-11	1975-10-31
1976	1976-01-12	1976-12-23
1977	1977-01-14	1977-12-02
1978	1978-04-09	1978-12-05
1979	1979-01-17	1979-11-15
1980	1980-04-18	1980-12-02
1981	1981-01-27	1981-12-12
1982	1982-01-07	1982-09-29
1983	1983-03-03	1983-11-16
1984	1984-01-01	1984-11-10
1985	1985-03-16	1985-12-08
1986	1986-04-16	1986-12-07
1987	1987-01-25	1987-12-02
1988	1988-01-24	1988-12-21
1989	1989-04-26	1989-11-06
1990	1990-06-13	1990-12-10
1991	1991-01-23	1991-11-06
1992	1992-03-01	1992-12-25
1993	1993-01-24	1993-12-14
1994	1994-01-07	1994-11-02
1995	1995-02-05	1995-09-24
1996	1996-01-01	1996-12-06
1997	1997-01-15	1997-11-01
1998	1998-04-12	1998-11-11
1999	1999-03-07	1999-12-03
2000	2000-02-20	2000-10-19
2001	2001-02-13	2001-11-23
2002	2002-03-26	2002-11-26
2003	2003-02-20	2003-12-20
2004	2004-03-29	2004-11-05
2005	2005-01-20	2005-12-17
2006	2006-01-02	2006-12-22
2007	2007-01-20	2007-11-03
2008	2008-04-03	2008-12-13
2009	2009-04-24	2009-11-22
2010	2010-03-07	2010-12-19
2011	2011-01-14	2011-12-18
2012	2012-01-08	2012-11-06
2013	2013-02-26	2013-09-13
2014	2014-02-14	2014-11-16
2015	2015-01-13	2015-11-04
2016	2016-01-22	2016-12-28
2017	2017-01-14	2017-12-19
2018	2018-04-16	2018-12-14
2019	2019-05-02	2019-11-02
2020	2020-01-20	2020-10-08
2021	2021-01-26	2021-11-24
2022	2022-01-23	2022-11-20
2023	2023-01-29	2023-12-12
2024	2024-01-07	2024-11-17
2025	2025-04-21	2025-11-29
2026	2026-02-28	2026-10-02

Every Fixed Threshold

Fixed thresholds at Happy Valley Reservoir
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	134	35	1992	22
25 mm (0.98 in): Days with 25 mm or more rain	122	7	1963	5
50 mm (1.97 in): Days with 50 mm or more rain	25	2	1993	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1892.

Download the Data

Data for Happy Valley Reservoir 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 2026-10-13 (13 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).

Happy Valley Reservoir Threshold Days by Year

Key Facts for Happy Valley Reservoir Thresholds

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

Every Fixed Threshold

Download the Data

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