Prospect Threshold Days by Year (USC00336861)

6 fixed thresholds counted per year at Prospect (USC00336861): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Prospect Thresholds

Prospect: days with 10 mm (0.39 in) or more of precipitation in 89 years, most in 2011 with 52.
Prospect: days with 25 mm (0.98 in) or more of precipitation in 89 years, most in 1990 with 16.
Prospect: days with 50 mm (1.97 in) or more of precipitation in 49 years, most in 1964 with 4.
Prospect: days with 10 cm (3.9 in) or more of snowfall in 29 years, most in 1979 with 5.
6 fixed thresholds have at least one qualifying day at Prospect.

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

89 years with a qualifying day

Days per year at Prospect with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 52 in 2011.

Days with 10 mm (0.39 in) or more of precipitation per year at Prospect
Year	Days	Decade average
1917	29	34.3
1918	34	34.3
1919	40	34.3
1921	48	36.3
1922	47	36.3
1923	44	36.3
1924	26	36.3
1925	26	36.3
1926	33	36.3
1927	33	36.3
1928	32	36.3
1929	38	36.3
1930	28	29.2
1931	34	29.2
1932	33	29.2
1933	33	29.2
1934	15	29.2
1935	26	29.2
1936	28	29.2
1937	35	29.2
1939	31	29.2
1940	32	26.4
1941	19	26.4
1942	28	26.4
1943	21	26.4
1946	25	26.4
1947	28	26.4
1948	31	26.4
1949	27	26.4
1950	30	28.2
1951	22	28.2
1952	24	28.2
1953	21	28.2
1954	32	28.2
1955	29	28.2
1957	43	28.2
1958	29	28.2
1959	24	28.2
1960	20	29.1
1962	21	29.1
1963	19	29.1
1964	40	29.1
1965	28	29.1
1966	36	29.1
1967	30	29.1
1968	31	29.1
1969	37	29.1
1970	29	32.4
1971	29	32.4
1972	35	32.4
1973	44	32.4
1974	33	32.4
1975	30	32.4
1976	27	32.4
1977	36	32.4
1978	24	32.4
1979	37	32.4
1980	32	33.4
1981	35	33.4
1982	26	33.4
1983	38	33.4
1984	31	33.4
1985	36	33.4
1986	39	33.4
1987	32	33.4
1988	30	33.4
1989	35	33.4
1990	48	32.9
1991	18	32.9
1992	37	32.9
1993	35	32.9
1994	31	32.9
1995	38	32.9
1996	36	32.9
1997	26	32.9
1998	30	32.9
1999	30	32.9
2000	29	35.3
2001	36	35.3
2002	36	35.3
2003	43	35.3
2004	34	35.3
2005	35	35.3
2006	39	35.3
2007	40	35.3
2008	36	35.3
2009	25	35.3
2010	21	36.5
2011	52	36.5

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

First to last qualifying date each year at Prospect
Year	First date	Last date
1917	1917-01-05	1917-12-09
1918	1918-02-20	1918-12-22
1919	1919-01-01	1919-11-29
1921	1921-01-04	1921-12-24
1922	1922-01-04	1922-12-28
1923	1923-01-21	1923-12-23
1924	1924-01-11	1924-12-17
1925	1925-01-20	1925-12-05
1926	1926-01-09	1926-12-26
1927	1927-01-19	1927-12-14
1928	1928-01-20	1928-12-18
1929	1929-01-15	1929-12-19
1930	1930-01-08	1930-12-01
1931	1931-01-06	1931-12-13
1932	1932-01-01	1932-12-31
1933	1933-01-19	1933-12-18
1934	1934-03-27	1934-09-29
1935	1935-01-17	1935-12-09
1936	1936-02-13	1936-12-31
1937	1937-01-14	1937-12-18
1939	1939-01-30	1939-12-02
1940	1940-01-14	1940-12-29
1941	1941-01-27	1941-12-24
1942	1942-02-05	1942-12-30
1943	1943-01-04	1943-11-16
1946	1946-02-06	1946-12-21
1947	1947-01-03	1947-10-29
1948	1948-01-02	1948-12-29
1949	1949-01-05	1949-12-27
1950	1950-01-03	1950-12-26
1951	1951-01-07	1951-12-15
1952	1952-01-17	1952-12-10
1953	1953-01-18	1953-12-22
1954	1954-01-21	1954-12-30
1955	1955-01-06	1955-11-16
1957	1957-01-23	1957-12-26
1958	1958-01-25	1958-10-10
1959	1959-01-15	1959-12-13
1960	1960-01-03	1960-11-10
1962	1962-01-06	1962-12-06
1963	1963-03-02	1963-11-01
1964	1964-01-02	1964-12-25
1965	1965-01-02	1965-10-22
1966	1966-01-01	1966-12-11
1967	1967-02-02	1967-12-22
1968	1968-01-30	1968-12-28
1969	1969-01-18	1969-12-08
1970	1970-01-29	1970-12-22
1971	1971-01-04	1971-12-30
1972	1972-01-02	1972-12-31
1973	1973-01-04	1973-12-31
1974	1974-01-10	1974-12-24
1975	1975-01-01	1975-12-26
1976	1976-01-14	1976-10-31
1977	1977-01-10	1977-12-25
1978	1978-01-08	1978-12-09
1979	1979-01-01	1979-12-24
1980	1980-01-11	1980-11-27
1981	1981-01-07	1981-12-23
1982	1982-01-23	1982-12-28
1983	1983-03-19	1983-12-29
1984	1984-02-14	1984-12-30
1985	1985-02-13	1985-12-12
1986	1986-01-19	1986-12-10
1987	1987-03-01	1987-12-29
1988	1988-01-18	1988-12-28
1989	1989-01-06	1989-12-30
1990	1990-01-20	1990-12-31
1991	1991-01-30	1991-12-03
1992	1992-01-14	1992-12-10
1993	1993-01-05	1993-12-05
1994	1994-01-17	1994-12-17
1995	1995-01-07	1995-12-20
1996	1996-01-19	1996-12-24
1997	1997-01-28	1997-12-25
1998	1998-01-07	1998-12-22
1999	1999-01-03	1999-12-14
2000	2000-01-04	2000-12-14
2001	2001-01-31	2001-12-18
2002	2002-01-30	2002-12-25
2003	2003-01-01	2003-12-30
2004	2004-01-02	2004-12-23
2005	2005-01-04	2005-12-11
2006	2006-01-02	2006-12-26
2007	2007-01-01	2007-12-16
2008	2008-01-09	2008-12-24
2009	2009-01-28	2009-10-31
2010	2010-03-14	2010-11-26
2011	2011-02-01	2011-12-21

Every Fixed Threshold

Fixed thresholds at Prospect
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	89	52	2011	52
25 mm (0.98 in): Days with 25 mm or more rain	89	16	1990	13
50 mm (1.97 in): Days with 50 mm or more rain	49	4	1964	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	29	5	1979	4
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1964	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

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Data for Prospect 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).

Prospect Threshold Days by Year (USC00336861)

Key Facts for Prospect Thresholds

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

Every Fixed Threshold

Download the Data

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