Heilbron (Tnk) Threshold Days by Year (SF004028270)

4 fixed thresholds counted per year at Heilbron (Tnk) (SF004028270): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heilbron (Tnk) Thresholds

Heilbron (Tnk): days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1967 with 38.
Heilbron (Tnk): days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1977 with 14.
Heilbron (Tnk): days with 50 mm (1.97 in) or more of precipitation in 40 years, most in 1988 with 5.
Heilbron (Tnk): days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1916 with 1.
4 fixed thresholds have at least one qualifying day at Heilbron (Tnk).

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

67 years with a qualifying day

Days per year at Heilbron (Tnk) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 38 in 1967.

Days with 10 mm (0.39 in) or more of precipitation per year at Heilbron (Tnk)
Year	Days	Decade average
1906	22	22
1914	23	20.7
1915	16	20.7
1916	23	20.7
1930	14	21.2
1931	20	21.2
1932	15	21.2
1933	16	21.2
1934	32	21.2
1935	16	21.2
1936	27	21.2
1937	19	21.2
1938	26	21.2
1939	27	21.2
1941	12	21.8
1942	29	21.8
1943	33	21.8
1945	15	21.8
1946	20	21.8
1947	25	21.8
1948	16	21.8
1949	24	21.8
1950	19	24.3
1951	22	24.3
1952	24	24.3
1953	18	24.3
1954	27	24.3
1955	29	24.3
1956	21	24.3
1957	34	24.3
1959	25	24.3
1960	25	24.8
1961	30	24.8
1962	24	24.8
1963	30	24.8
1964	29	24.8
1965	14	24.8
1966	18	24.8
1967	38	24.8
1968	15	24.8
1970	25	24.7
1971	22	24.7
1972	24	24.7
1973	34	24.7
1974	24	24.7
1975	22	24.7
1976	23	24.7
1977	21	24.7
1978	24	24.7
1979	28	24.7
1981	31	21.6
1982	15	21.6
1983	23	21.6
1984	22	21.6
1985	12	21.6
1986	19	21.6
1987	22	21.6
1988	23	21.6
1989	27	21.6
1990	24	24.9
1991	23	24.9
1992	16	24.9
1993	25	24.9
1994	20	24.9
1995	31	24.9
1996	30	24.9
1997	30	24.9

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

First to last qualifying date each year at Heilbron (Tnk)
Year	First date	Last date
1906	1906-01-10	1906-12-29
1914	1914-01-04	1914-12-28
1915	1915-02-02	1915-12-23
1916	1916-01-01	1916-12-29
1930	1930-01-05	1930-12-31
1931	1931-01-09	1931-12-29
1932	1932-01-31	1932-12-26
1933	1933-01-09	1933-12-26
1934	1934-01-01	1934-12-26
1935	1935-01-22	1935-12-31
1936	1936-01-01	1936-12-14
1937	1937-01-13	1937-12-31
1938	1938-01-12	1938-12-16
1939	1939-01-01	1939-12-27
1941	1941-01-18	1941-12-18
1942	1942-01-02	1942-12-31
1943	1943-01-20	1943-12-13
1945	1945-01-08	1945-12-30
1946	1946-01-02	1946-12-29
1947	1947-01-05	1947-12-15
1948	1948-01-23	1948-11-03
1949	1949-01-03	1949-12-18
1950	1950-01-08	1950-12-25
1951	1951-01-02	1951-12-24
1952	1952-01-10	1952-12-16
1953	1953-01-03	1953-12-20
1954	1954-01-02	1954-12-28
1955	1955-01-16	1955-12-27
1956	1956-01-30	1956-12-21
1957	1957-01-10	1957-12-23
1959	1959-01-06	1959-12-31
1960	1960-01-19	1960-12-29
1961	1961-01-14	1961-12-12
1962	1962-01-08	1962-11-23
1963	1963-01-05	1963-12-31
1964	1964-01-08	1964-12-29
1965	1965-01-14	1965-12-26
1966	1966-01-20	1966-12-20
1967	1967-01-03	1967-12-22
1968	1968-01-13	1968-12-09
1970	1970-01-04	1970-12-25
1971	1971-01-19	1971-12-30
1972	1972-01-04	1972-12-25
1973	1973-01-06	1973-12-20
1974	1974-01-01	1974-12-29
1975	1975-01-16	1975-12-19
1976	1976-01-01	1976-12-15
1977	1977-01-12	1977-12-31
1978	1978-01-03	1978-12-29
1979	1979-01-01	1979-12-20
1981	1981-01-01	1981-12-30
1982	1982-01-04	1982-12-10
1983	1983-01-08	1983-12-30
1984	1984-01-01	1984-12-20
1985	1985-01-04	1985-12-23
1986	1986-01-17	1986-12-29
1987	1987-01-11	1987-12-17
1988	1988-01-13	1988-12-24
1989	1989-01-02	1989-12-30
1990	1990-01-02	1990-12-15
1991	1991-01-02	1991-12-26
1992	1992-01-01	1992-12-30
1993	1993-01-22	1993-12-28
1994	1994-01-10	1994-12-26
1995	1995-01-18	1995-12-25
1996	1996-01-01	1996-12-24
1997	1997-01-26	1997-11-29

Every Fixed Threshold

Fixed thresholds at Heilbron (Tnk)
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	67	38	1967	30
25 mm (0.98 in): Days with 25 mm or more rain	67	14	1977	12
50 mm (1.97 in): Days with 50 mm or more rain	40	5	1988	2
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1916	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

Data for Heilbron (Tnk) 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).

Heilbron (Tnk) Threshold Days by Year (SF004028270)

Key Facts for Heilbron (Tnk) Thresholds

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

Every Fixed Threshold

Download the Data

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