Lower Boro (Calderwood) Threshold Days by Year

4 fixed thresholds counted per year at Lower Boro (Calderwood) (ASN00070060): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lower Boro (Calderwood) Thresholds

Lower Boro (Calderwood): days with 10 mm (0.39 in) or more of precipitation in 105 years, most in 1950 with 40.
Lower Boro (Calderwood): days with 25 mm (0.98 in) or more of precipitation in 105 years, most in 1950 with 16.
Lower Boro (Calderwood): days with 50 mm (1.97 in) or more of precipitation in 69 years, most in 1959 with 6.
Lower Boro (Calderwood): days with 100 mm (3.94 in) or more of precipitation in 9 years, most in 1925 with 1.
4 fixed thresholds have at least one qualifying day at Lower Boro (Calderwood).

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

105 years with a qualifying day

Days per year at Lower Boro (Calderwood) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1950.

Days with 10 mm (0.39 in) or more of precipitation per year at Lower Boro (Calderwood)
Year	Days	Decade average
1911	16	17.9
1912	12	17.9
1913	18	17.9
1914	19	17.9
1915	13	17.9
1916	28	17.9
1917	20	17.9
1918	16	17.9
1919	19	17.9
1920	23	18.1
1921	22	18.1
1922	17	18.1
1923	15	18.1
1924	17	18.1
1925	20	18.1
1926	15	18.1
1927	14	18.1
1928	15	18.1
1929	23	18.1
1930	11	18.1
1931	22	18.1
1932	13	18.1
1933	14	18.1
1934	24	18.1
1935	20	18.1
1936	21	18.1
1937	18	18.1
1938	19	18.1
1939	19	18.1
1940	11	17.1
1941	15	17.1
1942	14	17.1
1943	21	17.1
1944	11	17.1
1945	17	17.1
1946	17	17.1
1947	24	17.1
1948	18	17.1
1949	23	17.1
1950	40	21.9
1951	22	21.9
1952	34	21.9
1953	12	21.9
1954	9	21.9
1955	23	21.9
1956	27	21.9
1957	7	21.9
1958	17	21.9
1959	28	21.9
1960	24	19.8
1961	33	19.8
1962	19	19.8
1963	21	19.8
1964	22	19.8
1965	11	19.8
1966	19	19.8
1967	11	19.8
1968	13	19.8
1969	25	19.8
1970	25	22
1971	20	22
1972	13	22
1973	23	22
1974	30	22
1975	28	22
1976	25	22
1977	17	22
1978	28	22
1979	11	22
1980	12	18.5
1981	20	18.5
1982	7	18.5
1983	22	18.5
1984	26	18.5
1985	15	18.5
1986	20	18.5
1987	16	18.5
1988	29	18.5
1989	18	18.5
1990	24	21.7
1991	17	21.7
1992	22	21.7
1994	21	21.7
1995	20	21.7
1996	25	21.7
1997	16	21.7
1998	27	21.7
1999	23	21.7
2000	21	16.8
2001	16	16.8
2002	14	16.8
2003	15	16.8
2004	18	16.8
2005	24	16.8
2006	12	16.8
2007	19	16.8
2008	16	16.8
2009	13	16.8
2010	27	19
2011	15	19
2013	14	19
2014	18	19
2015	19	19
2016	21	19
2026	10	10

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

First to last qualifying date each year at Lower Boro (Calderwood)
Year	First date	Last date
1911	1911-01-12	1911-12-05
1912	1912-02-09	1912-12-27
1913	1913-03-09	1913-12-25
1914	1914-03-20	1914-12-30
1915	1915-01-15	1915-12-29
1916	1916-01-29	1916-12-26
1917	1917-01-23	1917-12-13
1918	1918-01-11	1918-11-12
1919	1919-02-24	1919-12-30
1920	1920-01-01	1920-12-28
1921	1921-01-17	1921-12-31
1922	1922-01-04	1922-12-12
1923	1923-01-25	1923-12-27
1924	1924-01-21	1924-12-28
1925	1925-01-07	1925-11-20
1926	1926-01-06	1926-12-22
1927	1927-01-06	1927-12-10
1928	1928-01-13	1928-12-13
1929	1929-02-12	1929-12-28
1930	1930-04-11	1930-12-17
1931	1931-01-02	1931-12-23
1932	1932-03-15	1932-12-24
1933	1933-01-16	1933-12-13
1934	1934-01-06	1934-12-24
1935	1935-01-05	1935-12-04
1936	1936-01-05	1936-12-18
1937	1937-01-02	1937-12-29
1938	1938-01-14	1938-10-26
1939	1939-01-08	1939-12-13
1940	1940-01-07	1940-12-20
1941	1941-01-03	1941-11-20
1942	1942-02-14	1942-11-22
1943	1943-01-14	1943-12-18
1944	1944-01-24	1944-12-13
1945	1945-01-12	1945-12-28
1946	1946-01-19	1946-12-28
1947	1947-02-05	1947-12-25
1948	1948-01-02	1948-12-30
1949	1949-02-02	1949-12-20
1950	1950-01-02	1950-12-30
1951	1951-01-07	1951-11-20
1952	1952-01-06	1952-12-29
1953	1953-01-05	1953-12-31
1954	1954-02-15	1954-11-21
1955	1955-01-24	1955-12-21
1956	1956-01-20	1956-10-16
1957	1957-03-02	1957-12-30
1958	1958-01-30	1958-12-17
1959	1959-01-27	1959-12-05
1960	1960-01-12	1960-12-28
1961	1961-01-03	1961-12-16
1962	1962-01-12	1962-12-19
1963	1963-01-16	1963-12-17
1964	1964-01-25	1964-12-23
1965	1965-06-23	1965-12-05
1966	1966-01-30	1966-12-24
1967	1967-01-26	1967-10-12
1968	1968-01-22	1968-12-31
1969	1969-01-16	1969-12-13
1970	1970-01-02	1970-12-29
1971	1971-01-04	1971-12-31
1972	1972-01-06	1972-11-25
1973	1973-01-13	1973-12-31
1974	1974-01-11	1974-11-27
1975	1975-01-10	1975-12-30
1976	1976-01-10	1976-12-24
1977	1977-01-15	1977-12-26
1978	1978-01-03	1978-12-26
1979	1979-03-04	1979-11-26
1980	1980-01-02	1980-12-30
1981	1981-01-07	1981-12-28
1982	1982-01-18	1982-12-31
1983	1983-01-03	1983-12-27
1984	1984-01-01	1984-12-30
1985	1985-03-19	1985-12-08
1986	1986-01-16	1986-12-31
1987	1987-02-11	1987-12-29
1988	1988-01-18	1988-12-26
1989	1989-01-01	1989-12-06
1990	1990-01-09	1990-12-11
1991	1991-01-06	1991-12-14
1992	1992-01-01	1992-12-06
1994	1994-02-11	1994-12-23
1995	1995-01-18	1995-12-06
1996	1996-01-02	1996-12-07
1997	1997-01-07	1997-12-15
1998	1998-01-19	1998-11-13
1999	1999-01-10	1999-12-28
2000	2000-01-27	2000-12-02
2001	2001-01-06	2001-11-07
2002	2002-01-16	2002-12-21
2003	2003-01-01	2003-11-23
2004	2004-01-07	2004-12-14
2005	2005-01-21	2005-12-03
2006	2006-01-17	2006-12-24
2007	2007-01-18	2007-12-17
2008	2008-01-17	2008-12-28
2009	2009-01-23	2009-12-28
2010	2010-01-17	2010-12-16
2011	2011-01-10	2011-12-21
2013	2013-01-27	2013-12-05
2014	2014-02-17	2014-12-15
2015	2015-01-05	2015-12-27
2016	2016-01-05	2016-12-15
2026	2026-01-15	2026-08-26

Every Fixed Threshold

Fixed thresholds at Lower Boro (Calderwood)
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	105	40	1950	10
25 mm (0.98 in): Days with 25 mm or more rain	105	16	1950	2
50 mm (1.97 in): Days with 50 mm or more rain	69	6	1959	2
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1925	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 Lower Boro (Calderwood) 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).

Lower Boro (Calderwood) Threshold Days by Year

Key Facts for Lower Boro (Calderwood) Thresholds

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

Every Fixed Threshold

Download the Data

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