Thornlea Threshold Days by Year (SF002840080)

3 fixed thresholds counted per year at Thornlea (SF002840080): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thornlea Thresholds

Thornlea: days with 10 mm (0.39 in) or more of precipitation in 94 years, most in 1974 with 16.
Thornlea: days with 25 mm (0.98 in) or more of precipitation in 69 years, most in 1950 with 6.
Thornlea: days with 50 mm (1.97 in) or more of precipitation in 15 years, most in 1941 with 2.
3 fixed thresholds have at least one qualifying day at Thornlea.

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

94 years with a qualifying day

Days per year at Thornlea with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 16 in 1974.

Days with 10 mm (0.39 in) or more of precipitation per year at Thornlea
Year	Days	Decade average
1900	7	4.9
1902	1	4.9
1903	1	4.9
1904	8	4.9
1905	1	4.9
1906	8	4.9
1907	7	4.9
1908	2	4.9
1909	9	4.9
1911	10	5.5
1912	4	5.5
1913	4	5.5
1914	3	5.5
1915	3	5.5
1917	9	5.5
1918	7	5.5
1919	4	5.5
1920	4	6.9
1921	13	6.9
1923	4	6.9
1924	3	6.9
1925	9	6.9
1926	6	6.9
1927	3	6.9
1928	12	6.9
1929	8	6.9
1930	5	7.4
1931	8	7.4
1932	4	7.4
1933	8	7.4
1934	14	7.4
1935	7	7.4
1936	5	7.4
1937	7	7.4
1938	8	7.4
1939	8	7.4
1940	6	5.8
1941	6	5.8
1942	14	5.8
1943	7	5.8
1944	5	5.8
1945	4	5.8
1946	4	5.8
1947	2	5.8
1948	5	5.8
1949	5	5.8
1950	13	7.6
1951	1	7.6
1952	7	7.6
1953	10	7.6
1954	7	7.6
1955	9	7.6
1956	9	7.6
1957	7	7.6
1958	5	7.6
1959	8	7.6
1960	2	5.1
1961	7	5.1
1962	2	5.1
1963	6	5.1
1964	3	5.1
1965	4	5.1
1966	2	5.1
1967	9	5.1
1968	10	5.1
1969	6	5.1
1970	8	9
1971	10	9
1972	8	9
1973	8	9
1974	16	9
1975	7	9
1976	13	9
1977	8	9
1978	7	9
1979	5	9
1980	11	4.4
1981	5	4.4
1982	4	4.4
1983	3	4.4
1984	2	4.4
1985	3	4.4
1986	1	4.4
1987	3	4.4
1988	9	4.4
1989	3	4.4
1990	3	5.8
1991	7	5.8
1992	3	5.8
1993	5	5.8
1994	11	5.8
1995	7	5.8
1996	7	5.8
1997	3	5.8

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

First to last qualifying date each year at Thornlea
Year	First date	Last date
1900	1900-02-25	1900-12-03
1902	1902-03-21	1902-03-21
1903	1903-02-03	1903-02-03
1904	1904-01-08	1904-12-17
1905	1905-02-13	1905-02-13
1906	1906-01-31	1906-11-23
1907	1907-01-07	1907-04-29
1908	1908-07-10	1908-07-11
1909	1909-02-14	1909-11-30
1911	1911-01-04	1911-08-09
1912	1912-01-25	1912-06-17
1913	1913-04-18	1913-11-20
1914	1914-03-21	1914-12-02
1915	1915-02-14	1915-03-22
1917	1917-01-25	1917-08-12
1918	1918-02-27	1918-05-06
1919	1919-03-10	1919-04-28
1920	1920-02-02	1920-03-20
1921	1921-02-14	1921-12-07
1923	1923-02-17	1923-05-03
1924	1924-01-26	1924-12-04
1925	1925-02-14	1925-05-29
1926	1926-03-06	1926-11-17
1927	1927-03-27	1927-10-19
1928	1928-01-03	1928-10-16
1929	1929-03-04	1929-12-16
1930	1930-02-13	1930-12-27
1931	1931-01-15	1931-11-03
1932	1932-02-17	1932-12-15
1933	1933-04-02	1933-12-28
1934	1934-01-02	1934-11-28
1935	1935-03-20	1935-11-02
1936	1936-03-09	1936-11-17
1937	1937-01-19	1937-12-14
1938	1938-01-24	1938-11-28
1939	1939-02-01	1939-10-12
1940	1940-01-27	1940-11-09
1941	1941-01-20	1941-02-11
1942	1942-02-12	1942-12-20
1943	1943-02-19	1943-11-29
1944	1944-01-05	1944-06-14
1945	1945-01-06	1945-03-11
1946	1946-01-18	1946-04-04
1947	1947-04-24	1947-05-10
1948	1948-02-26	1948-12-16
1949	1949-02-25	1949-12-10
1950	1950-02-23	1950-12-24
1951	1951-05-15	1951-05-15
1952	1952-02-04	1952-12-15
1953	1953-02-07	1953-12-20
1954	1954-03-13	1954-04-30
1955	1955-01-19	1955-12-13
1956	1956-01-15	1956-05-16
1957	1957-03-02	1957-12-30
1958	1958-01-24	1958-12-31
1959	1959-01-24	1959-12-08
1960	1960-03-14	1960-04-19
1961	1961-01-01	1961-11-26
1962	1962-03-13	1962-11-02
1963	1963-01-25	1963-10-28
1964	1964-02-11	1964-11-04
1965	1965-03-22	1965-04-15
1966	1966-01-21	1966-04-28
1967	1967-02-12	1967-11-22
1968	1968-03-03	1968-12-01
1969	1969-02-26	1969-05-30
1970	1970-02-01	1970-11-13
1971	1971-01-24	1971-12-17
1972	1972-01-05	1972-04-16
1973	1973-01-05	1973-12-02
1974	1974-01-14	1974-12-16
1975	1975-01-31	1975-12-14
1976	1976-01-03	1976-12-14
1977	1977-01-27	1977-11-29
1978	1978-01-07	1978-10-26
1979	1979-01-26	1979-10-17
1980	1980-02-22	1980-11-28
1981	1981-02-20	1981-11-25
1982	1982-03-01	1982-12-04
1983	1983-05-13	1983-12-29
1984	1984-04-05	1984-04-07
1985	1985-01-13	1985-11-27
1986	1986-06-01	1986-06-01
1987	1987-04-12	1987-11-28
1988	1988-02-18	1988-12-18
1989	1989-02-07	1989-02-11
1990	1990-02-06	1990-04-21
1991	1991-01-20	1991-12-07
1992	1992-02-18	1992-10-08
1993	1993-02-06	1993-07-18
1994	1994-01-24	1994-12-05
1995	1995-03-23	1995-12-13
1996	1996-01-13	1996-12-28
1997	1997-03-17	1997-10-30

Every Fixed Threshold

Fixed thresholds at Thornlea
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	94	16	1974	3
25 mm (0.98 in): Days with 25 mm or more rain	69	6	1950	2
50 mm (1.97 in): Days with 50 mm or more rain	15	2	1941	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Thornlea 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).

Thornlea Threshold Days by Year (SF002840080)

Key Facts for Thornlea Thresholds

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

Every Fixed Threshold

Download the Data

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