Lancaster Threshold Days by Year (USC00154620)

6 fixed thresholds counted per year at Lancaster (USC00154620): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lancaster Thresholds

Lancaster: days with 10 mm (0.39 in) or more of precipitation in 63 years, most in 1950 with 62.
Lancaster: days with 25 mm (0.98 in) or more of precipitation in 63 years, most in 1948 with 21.
Lancaster: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 1935 with 7.
Lancaster: days with 10 cm (3.9 in) or more of snowfall in 7 years, most in 1951 with 2.
6 fixed thresholds have at least one qualifying day at Lancaster.

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

63 years with a qualifying day

Days per year at Lancaster with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 62 in 1950.

Days with 10 mm (0.39 in) or more of precipitation per year at Lancaster
Year	Days	Decade average
1926	51	40.3
1927	40	40.3
1928	30	40.3
1929	40	40.3
1930	24	39.2
1931	37	39.2
1932	45	39.2
1933	42	39.2
1935	49	39.2
1936	31	39.2
1937	35	39.2
1938	36	39.2
1939	54	39.2
1940	36	40.4
1941	28	40.4
1942	40	40.4
1943	47	40.4
1944	34	40.4
1945	48	40.4
1946	41	40.4
1947	42	40.4
1948	48	40.4
1950	62	44.2
1951	54	44.2
1952	41	44.2
1953	38	44.2
1954	34	44.2
1955	42	44.2
1956	47	44.2
1957	48	44.2
1958	40	44.2
1959	36	44.2
1960	41	38.1
1961	41	38.1
1962	49	38.1
1963	25	38.1
1964	38	38.1
1965	33	38.1
1966	35	38.1
1967	43	38.1
1968	45	38.1
1969	31	38.1
1970	33	36.3
1971	28	36.3
1972	47	36.3
1973	41	36.3
1975	39	36.3
1976	30	36.3
1980	25	33.1
1981	39	33.1
1982	34	33.1
1983	32	33.1
1984	43	33.1
1985	32	33.1
1986	32	33.1
1987	28	33.1
1994	38	41.8
1995	44	41.8
1996	49	41.8
1997	47	41.8
1998	41	41.8
1999	32	41.8
2001	36	36

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

First to last qualifying date each year at Lancaster
Year	First date	Last date
1926	1926-01-18	1926-12-26
1927	1927-01-20	1927-12-16
1928	1928-01-19	1928-11-30
1929	1929-01-10	1929-12-28
1930	1930-01-03	1930-12-26
1931	1931-02-08	1931-12-31
1932	1932-01-14	1932-12-30
1933	1933-01-08	1933-12-19
1935	1935-01-01	1935-12-08
1936	1936-01-01	1936-12-30
1937	1937-01-02	1937-12-17
1938	1938-01-20	1938-12-26
1939	1939-01-04	1939-12-27
1940	1940-02-05	1940-12-28
1941	1941-01-15	1941-12-31
1942	1942-01-03	1942-12-29
1943	1943-01-17	1943-12-28
1944	1944-01-02	1944-12-31
1945	1945-01-01	1945-12-28
1946	1946-01-07	1946-12-21
1947	1947-01-02	1947-12-16
1948	1948-01-01	1948-12-29
1950	1950-01-03	1950-12-07
1951	1951-01-03	1951-12-26
1952	1952-01-02	1952-12-10
1953	1953-01-06	1953-12-21
1954	1954-01-11	1954-12-30
1955	1955-01-05	1955-11-19
1956	1956-01-29	1956-12-24
1957	1957-01-05	1957-12-26
1958	1958-01-14	1958-12-24
1959	1959-01-01	1959-12-28
1960	1960-01-03	1960-12-30
1961	1961-01-01	1961-12-09
1962	1962-01-06	1962-12-22
1963	1963-02-11	1963-11-29
1964	1964-01-01	1964-12-12
1965	1965-02-08	1965-11-22
1966	1966-01-01	1966-12-28
1967	1967-01-19	1967-12-22
1968	1968-01-02	1968-12-31
1969	1969-01-20	1969-12-31
1970	1970-02-02	1970-12-22
1971	1971-01-04	1971-12-20
1972	1972-01-02	1972-12-31
1973	1973-01-04	1973-12-26
1975	1975-01-31	1975-12-31
1976	1976-01-01	1976-12-07
1980	1980-01-12	1980-12-24
1981	1981-02-17	1981-12-22
1982	1982-01-01	1982-12-26
1983	1983-01-22	1983-12-27
1984	1984-01-18	1984-12-31
1985	1985-01-01	1985-11-28
1986	1986-01-19	1986-12-24
1987	1987-01-19	1987-12-27
1994	1994-01-05	1994-12-11
1995	1995-01-07	1995-12-31
1996	1996-01-02	1996-12-24
1997	1997-01-05	1997-12-10
1998	1998-01-06	1998-12-13
1999	1999-01-03	1999-12-13
2001	2001-01-19	2001-12-13

Every Fixed Threshold

Fixed thresholds at Lancaster
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	63	62	1950	36
25 mm (0.98 in): Days with 25 mm or more rain	63	21	1948	15
50 mm (1.97 in): Days with 50 mm or more rain	52	7	1935	2
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1939	1
10 cm (3.9 in): Days with 10 cm or more snowfall	7	2	1951	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1998	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

Download the Data

Data for Lancaster 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).

Lancaster Threshold Days by Year (USC00154620)

Key Facts for Lancaster Thresholds

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

Every Fixed Threshold

Download the Data

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