Lanark Threshold Days by Year

4 fixed thresholds counted per year at Lanark (ASN00040071): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lanark Thresholds

Lanark: days with 10 mm (0.39 in) or more of precipitation in 78 years, most in 1947 with 34.
Lanark: days with 25 mm (0.98 in) or more of precipitation in 78 years, most in 1947 with 19.
Lanark: days with 50 mm (1.97 in) or more of precipitation in 59 years, most in 1942 with 6.
Lanark: days with 100 mm (3.94 in) or more of precipitation in 9 years, most in 1942 with 1.
4 fixed thresholds have at least one qualifying day at Lanark.

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

78 years with a qualifying day

Days per year at Lanark with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 34 in 1947.

Days with 10 mm (0.39 in) or more of precipitation per year at Lanark
Year	Days	Decade average
1940	13	22.1
1941	16	22.1
1942	31	22.1
1943	27	22.1
1944	18	22.1
1945	29	22.1
1946	17	22.1
1947	34	22.1
1948	14	22.1
1949	22	22.1
1950	30	22.6
1951	11	22.6
1952	16	22.6
1953	21	22.6
1954	31	22.6
1955	31	22.6
1956	28	22.6
1957	13	22.6
1958	18	22.6
1959	27	22.6
1960	17	20.8
1961	21	20.8
1962	24	20.8
1963	26	20.8
1964	24	20.8
1965	17	20.8
1966	22	20.8
1967	20	20.8
1968	21	20.8
1969	16	20.8
1970	19	22.9
1971	31	22.9
1972	21	22.9
1973	26	22.9
1974	25	22.9
1975	23	22.9
1976	21	22.9
1977	12	22.9
1978	31	22.9
1979	20	22.9
1980	17	22.1
1981	27	22.1
1982	18	22.1
1983	33	22.1
1984	25	22.1
1985	21	22.1
1986	17	22.1
1987	19	22.1
1988	21	22.1
1989	23	22.1
1990	17	18.9
1991	15	18.9
1992	19	18.9
1993	15	18.9
1994	15	18.9
1995	28	18.9
1996	20	18.9
1997	16	18.9
1998	25	18.9
1999	19	18.9
2000	17	18.3
2001	20	18.3
2002	15	18.3
2003	17	18.3
2004	20	18.3
2005	15	18.3
2006	13	18.3
2007	20	18.3
2008	28	18.3
2015	18	17
2016	20	17
2017	20	17
2018	21	17
2019	6	17
2023	12	15
2024	25	15
2025	13	15
2026	10	15

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

First to last qualifying date each year at Lanark
Year	First date	Last date
1940	1940-02-26	1940-12-17
1941	1941-01-05	1941-12-29
1942	1942-01-16	1942-12-30
1943	1943-01-31	1943-12-29
1944	1944-01-31	1944-12-27
1945	1945-01-01	1945-12-28
1946	1946-01-07	1946-12-31
1947	1947-01-03	1947-12-25
1948	1948-02-14	1948-12-31
1949	1949-02-06	1949-12-18
1950	1950-01-03	1950-11-25
1951	1951-01-25	1951-12-20
1952	1952-01-09	1952-12-24
1953	1953-02-10	1953-11-30
1954	1954-01-03	1954-12-15
1955	1955-01-06	1955-12-25
1956	1956-01-20	1956-12-23
1957	1957-01-06	1957-11-19
1958	1958-01-19	1958-12-28
1959	1959-01-03	1959-12-24
1960	1960-01-05	1960-12-08
1961	1961-01-04	1961-12-20
1962	1962-01-05	1962-12-31
1963	1963-01-02	1963-12-15
1964	1964-02-09	1964-12-30
1965	1965-01-23	1965-12-20
1966	1966-01-23	1966-12-30
1967	1967-01-05	1967-12-29
1968	1968-01-06	1968-12-20
1969	1969-01-02	1969-12-24
1970	1970-01-02	1970-12-25
1971	1971-01-01	1971-12-28
1972	1972-01-01	1972-12-29
1973	1973-01-09	1973-12-21
1974	1974-01-01	1974-12-29
1975	1975-01-09	1975-12-23
1976	1976-01-15	1976-12-24
1977	1977-01-12	1977-11-22
1978	1978-01-07	1978-12-03
1979	1979-01-24	1979-12-22
1980	1980-01-13	1980-12-30
1981	1981-01-01	1981-12-30
1982	1982-01-20	1982-12-13
1983	1983-01-01	1983-11-21
1984	1984-01-02	1984-12-30
1985	1985-01-06	1985-12-28
1986	1986-01-10	1986-12-27
1987	1987-01-04	1987-12-13
1988	1988-01-20	1988-12-19
1989	1989-01-06	1989-12-22
1990	1990-01-16	1990-12-25
1991	1991-01-06	1991-12-20
1992	1992-01-01	1992-12-28
1993	1993-01-05	1993-12-23
1994	1994-01-15	1994-12-26
1995	1995-01-04	1995-12-24
1996	1996-01-04	1996-12-31
1997	1997-01-02	1997-12-25
1998	1998-01-31	1998-12-31
1999	1999-01-11	1999-12-27
2000	2000-01-03	2000-12-29
2001	2001-01-29	2001-11-27
2002	2002-02-07	2002-12-27
2003	2003-02-05	2003-12-07
2004	2004-01-12	2004-12-11
2005	2005-01-07	2005-12-02
2006	2006-01-04	2006-12-28
2007	2007-01-10	2007-12-28
2008	2008-01-11	2008-12-28
2015	2015-01-01	2015-12-28
2016	2016-01-04	2016-12-22
2017	2017-01-02	2017-12-25
2018	2018-01-01	2018-12-15
2019	2019-03-14	2019-10-20
2023	2023-01-29	2023-12-31
2024	2024-01-28	2024-12-31
2025	2025-01-02	2025-12-25
2026	2026-01-17	2026-10-07

Every Fixed Threshold

Fixed thresholds at Lanark
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	78	34	1947	10
25 mm (0.98 in): Days with 25 mm or more rain	78	19	1947	5
50 mm (1.97 in): Days with 50 mm or more rain	59	6	1942	2
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1942	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

Data for Lanark 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Lanark Threshold Days by Year

Key Facts for Lanark Thresholds

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

Every Fixed Threshold

Download the Data

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