Preston Reservoir Threshold Days by Year

4 fixed thresholds counted per year at Preston Reservoir (ASN00086096): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Preston Reservoir Thresholds

Preston Reservoir: days with 10 mm (0.39 in) or more of precipitation in 104 years, most in 1978 with 32.
Preston Reservoir: days with 25 mm (0.98 in) or more of precipitation in 97 years, most in 1960 with 8.
Preston Reservoir: days with 50 mm (1.97 in) or more of precipitation in 38 years, most in 1970 with 3.
Preston Reservoir: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1941 with 1.
4 fixed thresholds have at least one qualifying day at Preston Reservoir.

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

104 years with a qualifying day

Days per year at Preston Reservoir with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1978.

Days with 10 mm (0.39 in) or more of precipitation per year at Preston Reservoir
Year	Days	Decade average
1911	24	14.3
1912	10	14.3
1913	11	14.3
1914	12	14.3
1915	10	14.3
1916	24	14.3
1917	9	14.3
1918	17	14.3
1919	12	14.3
1920	19	14.1
1921	22	14.1
1922	17	14.1
1923	7	14.1
1924	16	14.1
1925	9	14.1
1926	9	14.1
1927	6	14.1
1928	13	14.1
1929	23	14.1
1930	19	17.2
1931	21	17.2
1932	18	17.2
1933	12	17.2
1934	25	17.2
1935	19	17.2
1936	12	17.2
1937	14	17.2
1938	10	17.2
1939	22	17.2
1940	11	15.8
1941	23	15.8
1942	21	15.8
1943	6	15.8
1944	16	15.8
1945	10	15.8
1946	20	15.8
1947	20	15.8
1948	15	15.8
1949	16	15.8
1950	21	19.7
1951	22	19.7
1952	28	19.7
1953	19	19.7
1954	21	19.7
1955	21	19.7
1956	17	19.7
1957	12	19.7
1958	18	19.7
1959	18	19.7
1960	23	17.6
1961	17	17.6
1962	18	17.6
1963	21	17.6
1964	25	17.6
1965	14	17.6
1966	19	17.6
1967	10	17.6
1968	13	17.6
1969	16	17.6
1970	25	21.6
1971	22	21.6
1972	14	21.6
1973	25	21.6
1974	28	21.6
1975	24	21.6
1976	16	21.6
1977	18	21.6
1978	32	21.6
1979	12	21.6
1980	16	18.8
1981	18	18.8
1982	18	18.8
1983	22	18.8
1984	17	18.8
1985	23	18.8
1986	19	18.8
1987	16	18.8
1988	17	18.8
1989	22	18.8
1990	20	19.2
1991	20	19.2
1992	18	19.2
1993	25	19.2
1994	13	19.2
1995	24	19.2
1996	23	19.2
1997	10	19.2
1998	18	19.2
1999	21	19.2
2000	19	14.6
2001	20	14.6
2002	11	14.6
2003	12	14.6
2004	22	14.6
2005	13	14.6
2006	10	14.6
2007	14	14.6
2008	13	14.6
2009	12	14.6
2021	20	19
2022	28	19
2023	19	19
2024	14	19
2025	14	19

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

First to last qualifying date each year at Preston Reservoir
Year	First date	Last date
1911	1911-01-18	1911-12-13
1912	1912-02-08	1912-12-06
1913	1913-02-05	1913-12-23
1914	1914-01-26	1914-12-26
1915	1915-01-08	1915-10-23
1916	1916-01-28	1916-12-12
1917	1917-02-22	1917-12-31
1918	1918-01-14	1918-12-26
1919	1919-01-07	1919-12-28
1920	1920-01-27	1920-11-16
1921	1921-01-02	1921-12-30
1922	1922-01-08	1922-12-22
1923	1923-06-04	1923-11-18
1924	1924-01-28	1924-12-26
1925	1925-01-13	1925-11-23
1926	1926-01-07	1926-12-18
1927	1927-03-19	1927-12-19
1928	1928-01-18	1928-05-11
1929	1929-01-30	1929-12-16
1930	1930-02-20	1930-12-27
1931	1931-01-26	1931-11-21
1932	1932-02-06	1932-12-24
1933	1933-01-27	1933-12-26
1934	1934-01-07	1934-12-29
1935	1935-01-05	1935-12-21
1936	1936-01-10	1936-12-17
1937	1937-01-03	1937-10-19
1938	1938-01-15	1938-11-04
1939	1939-02-17	1939-11-27
1940	1940-01-06	1940-12-20
1941	1941-01-04	1941-12-08
1942	1942-01-20	1942-12-19
1943	1943-01-23	1943-11-18
1944	1944-01-23	1944-12-21
1945	1945-01-31	1945-11-17
1946	1946-01-17	1946-12-29
1947	1947-02-04	1947-12-23
1948	1948-01-03	1948-12-29
1949	1949-02-23	1949-12-21
1950	1950-02-02	1950-12-30
1951	1951-01-07	1951-12-14
1952	1952-01-05	1952-12-27
1953	1953-01-06	1953-12-11
1954	1954-01-17	1954-12-12
1955	1955-01-28	1955-12-31
1956	1956-01-11	1956-11-10
1957	1957-03-14	1957-12-26
1958	1958-02-18	1958-11-29
1959	1959-01-26	1959-12-26
1960	1960-01-09	1960-11-22
1961	1961-01-01	1961-12-14
1962	1962-01-20	1962-12-12
1963	1963-01-06	1963-12-06
1964	1964-02-12	1964-12-29
1965	1965-04-05	1965-12-03
1966	1966-01-13	1966-12-17
1967	1967-01-13	1967-12-30
1968	1968-01-21	1968-12-17
1969	1969-02-14	1969-12-03
1970	1970-01-02	1970-12-30
1971	1971-01-02	1971-12-27
1972	1972-01-13	1972-11-11
1973	1973-01-13	1973-12-22
1974	1974-01-15	1974-12-28
1975	1975-02-08	1975-12-30
1976	1976-01-09	1976-12-16
1977	1977-01-15	1977-12-28
1978	1978-01-24	1978-12-26
1979	1979-01-17	1979-11-12
1980	1980-01-03	1980-12-14
1981	1981-02-05	1981-12-13
1982	1982-01-25	1982-12-09
1983	1983-01-02	1983-12-01
1984	1984-01-02	1984-12-26
1985	1985-01-03	1985-12-23
1986	1986-01-10	1986-12-17
1987	1987-01-03	1987-12-28
1988	1988-01-01	1988-12-26
1989	1989-01-04	1989-12-14
1990	1990-02-01	1990-12-20
1991	1991-01-05	1991-12-31
1992	1992-01-01	1992-12-23
1993	1993-01-03	1993-12-28
1994	1994-02-01	1994-12-22
1995	1995-01-06	1995-12-05
1996	1996-01-01	1996-11-04
1997	1997-01-23	1997-11-14
1998	1998-01-25	1998-12-27
1999	1999-01-08	1999-12-28
2000	2000-01-27	2000-12-23
2001	2001-02-05	2001-12-27
2002	2002-01-02	2002-11-30
2003	2003-03-02	2003-12-19
2004	2004-01-05	2004-12-29
2005	2005-02-02	2005-12-07
2006	2006-01-02	2006-12-26
2007	2007-01-21	2007-12-23
2008	2008-01-20	2008-12-14
2009	2009-03-15	2009-12-18
2021	2021-01-30	2021-12-02
2022	2022-01-27	2022-12-23
2023	2023-01-25	2023-12-26
2024	2024-01-03	2024-12-01
2025	2025-01-07	2025-11-23

Every Fixed Threshold

Fixed thresholds at Preston 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	104	32	1978	14
25 mm (0.98 in): Days with 25 mm or more rain	97	8	1960	2
50 mm (1.97 in): Days with 50 mm or more rain	38	3	1970	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1941	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.

Download the Data

Data for Preston 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Preston Reservoir Threshold Days by Year

Key Facts for Preston Reservoir Thresholds

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

Every Fixed Threshold

Download the Data

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