Mt Pleasant 4SW Threshold Days by Year (USC00226084)

6 fixed thresholds counted per year at Mt Pleasant 4SW (USC00226084): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mt Pleasant 4SW Thresholds

Mt Pleasant 4SW: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 1950 with 61.
Mt Pleasant 4SW: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1996 with 27.
Mt Pleasant 4SW: days with 50 mm (1.97 in) or more of precipitation in 69 years, most in 2001 with 12.
Mt Pleasant 4SW: days with 100 mm (3.94 in) or more of precipitation in 24 years, most in 1958 with 2.
6 fixed thresholds have at least one qualifying day at Mt Pleasant 4SW.

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

70 years with a qualifying day

Days per year at Mt Pleasant 4SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 61 in 1950.

Days with 10 mm (0.39 in) or more of precipitation per year at Mt Pleasant 4SW
Year	Days	Decade average
1943	28	46.4
1944	56	46.4
1945	54	46.4
1946	48	46.4
1947	36	46.4
1948	49	46.4
1949	54	46.4
1950	61	45.7
1951	51	45.7
1952	37	45.7
1953	39	45.7
1954	35	45.7
1955	48	45.7
1956	40	45.7
1957	58	45.7
1958	45	45.7
1959	43	45.7
1960	44	40.8
1961	53	40.8
1962	40	40.8
1963	34	40.8
1964	42	40.8
1965	35	40.8
1966	34	40.8
1967	46	40.8
1968	44	40.8
1969	36	40.8
1970	47	46.1
1971	42	46.1
1972	58	46.1
1973	49	46.1
1974	46	46.1
1975	44	46.1
1976	42	46.1
1977	42	46.1
1978	39	46.1
1979	52	46.1
1980	36	42.6
1981	42	42.6
1982	41	42.6
1983	47	42.6
1984	44	42.6
1985	39	42.6
1986	37	42.6
1987	42	42.6
1988	46	42.6
1989	52	42.6
1990	52	46
1991	57	46
1992	43	46
1993	43	46
1994	44	46
1995	43	46
1996	45	46
1997	47	46
1998	49	46
1999	37	46
2000	34	38.6
2001	47	38.6
2002	50	38.6
2005	34	38.6
2006	31	38.6
2007	33	38.6
2008	38	38.6
2009	42	38.6
2011	35	38.8
2012	33	38.8
2014	42	38.8
2015	43	38.8
2016	41	38.8

For each year, a bar from the first to the last day at Mt Pleasant 4SW meeting 10 mm (0.39 in).

First to last qualifying date each year at Mt Pleasant 4SW
Year	First date	Last date
1943	1943-02-04	1943-12-28
1944	1944-01-02	1944-12-31
1945	1945-01-01	1945-12-25
1946	1946-01-03	1946-12-29
1947	1947-01-01	1947-12-15
1948	1948-01-01	1948-12-29
1949	1949-01-03	1949-12-27
1950	1950-01-02	1950-12-06
1951	1951-01-02	1951-12-26
1952	1952-01-03	1952-12-31
1953	1953-01-08	1953-12-28
1954	1954-01-15	1954-12-29
1955	1955-01-15	1955-12-18
1956	1956-01-19	1956-12-23
1957	1957-01-04	1957-12-26
1958	1958-01-13	1958-12-27
1959	1959-01-01	1959-12-18
1960	1960-01-03	1960-12-30
1961	1961-01-14	1961-12-27
1962	1962-01-01	1962-12-29
1963	1963-01-30	1963-12-23
1964	1964-01-06	1964-12-30
1965	1965-01-09	1965-12-12
1966	1966-01-02	1966-12-28
1967	1967-01-14	1967-12-22
1968	1968-01-02	1968-12-28
1969	1969-01-18	1969-12-30
1970	1970-01-11	1970-12-31
1971	1971-01-04	1971-12-30
1972	1972-01-02	1972-12-31
1973	1973-01-03	1973-12-26
1974	1974-01-03	1974-12-28
1975	1975-01-09	1975-12-26
1976	1976-01-02	1976-12-25
1977	1977-01-07	1977-12-14
1978	1978-01-08	1978-12-31
1979	1979-01-01	1979-12-24
1980	1980-01-04	1980-12-09
1981	1981-01-07	1981-12-01
1982	1982-01-21	1982-12-28
1983	1983-01-09	1983-12-28
1984	1984-01-10	1984-12-20
1985	1985-01-01	1985-12-01
1986	1986-01-19	1986-12-13
1987	1987-01-25	1987-12-28
1988	1988-01-01	1988-12-28
1989	1989-01-01	1989-12-31
1990	1990-01-04	1990-12-31
1991	1991-01-07	1991-12-23
1992	1992-01-03	1992-12-23
1993	1993-01-05	1993-12-29
1994	1994-01-07	1994-12-22
1995	1995-01-07	1995-12-31
1996	1996-01-12	1996-12-27
1997	1997-01-05	1997-12-24
1998	1998-01-05	1998-12-29
1999	1999-01-09	1999-12-14
2000	2000-01-04	2000-12-16
2001	2001-01-12	2001-12-23
2002	2002-01-07	2002-12-31
2005	2005-01-02	2005-12-24
2006	2006-01-11	2006-12-31
2007	2007-01-05	2007-12-20
2008	2008-01-31	2008-12-28
2009	2009-01-06	2009-12-31
2011	2011-01-10	2011-12-28
2012	2012-01-11	2012-11-27
2014	2014-01-11	2014-12-28
2015	2015-01-12	2015-12-28
2016	2016-01-10	2016-12-24

Every Fixed Threshold

Fixed thresholds at Mt Pleasant 4SW
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	70	61	1950	41
25 mm (0.98 in): Days with 25 mm or more rain	70	27	1996	15
50 mm (1.97 in): Days with 50 mm or more rain	69	12	2001	5
100 mm (3.94 in): Days with 100 mm or more rain	24	2	1958	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	2	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1948	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

Data for Mt Pleasant 4SW 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).

Mt Pleasant 4SW Threshold Days by Year (USC00226084)

Key Facts for Mt Pleasant 4SW Thresholds

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

Every Fixed Threshold

Download the Data

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