Heilbronn Threshold Days by Year (GME00123562)

11 fixed thresholds counted per year at Heilbronn (GME00123562): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heilbronn Thresholds

Heilbronn: days with a maximum temperature at or above 30 C (86 F) in 55 years, most in 1964 with 28.
Heilbronn: nights with a minimum temperature at or below 0 C (32 F) in 55 years, most in 1955 with 108.
Heilbronn: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1965 with 44.
Heilbronn: days with a maximum temperature at or below 0 C (32 F) in 54 years, most in 1963 with 47.
11 fixed thresholds have at least one qualifying day at Heilbronn.

Days at or above 30 C (86 F)

55 years with a qualifying day

Days per year at Heilbronn with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 28 in 1964.

Days at or above 30 C (86 F) per year at Heilbronn
Year	Days	Decade average
1948	12	14.5
1949	17	14.5
1950	12	8.6
1951	7	8.6
1952	18	8.6
1953	11	8.6
1954	4	8.6
1955	2	8.6
1956	1	8.6
1957	10	8.6
1958	6	8.6
1959	15	8.6
1960	3	10.2
1961	11	10.2
1962	10	10.2
1963	8	10.2
1964	28	10.2
1965	4	10.2
1966	7	10.2
1967	14	10.2
1968	7	10.2
1969	10	10.2
1970	8	10.4
1971	20	10.4
1972	10	10.4
1973	16	10.4
1974	5	10.4
1975	11	10.4
1976	22	10.4
1977	4	10.4
1978	2	10.4
1979	6	10.4
1980	3	9
1981	3	9
1982	14	9
1983	20	9
1984	8	9
1985	6	9
1986	11	9
1987	7	9
1988	8	9
1989	10	9
1990	16	16.8
1991	17	16.8
1992	23	16.8
1993	8	16.8
1994	28	16.8
1995	21	16.8
1996	8	16.8
1997	16	16.8
1998	18	16.8
1999	13	16.8
2000	11	13.7
2001	19	13.7
2002	11	13.7

For each year, a bar from the first to the last day at Heilbronn meeting 30 C (86 F).

First to last qualifying date each year at Heilbronn
Year	First date	Last date
1948	1948-06-09	1948-08-02
1949	1949-07-05	1949-09-06
1950	1950-06-06	1950-08-23
1951	1951-06-15	1951-08-30
1952	1952-06-29	1952-08-14
1953	1953-05-16	1953-09-02
1954	1954-06-20	1954-08-06
1955	1955-07-17	1955-07-18
1956	1956-05-28	1956-05-28
1957	1957-06-29	1957-07-08
1958	1958-07-13	1958-08-29
1959	1959-07-08	1959-09-12
1960	1960-06-23	1960-08-26
1961	1961-06-26	1961-09-18
1962	1962-06-14	1962-09-03
1963	1963-07-22	1963-08-06
1964	1964-06-01	1964-09-15
1965	1965-06-25	1965-07-14
1966	1966-06-10	1966-09-12
1967	1967-05-28	1967-08-16
1968	1968-04-21	1968-07-10
1969	1969-05-13	1969-08-05
1970	1970-06-21	1970-08-07
1971	1971-05-17	1971-08-19
1972	1972-07-09	1972-08-14
1973	1973-06-27	1973-09-09
1974	1974-08-03	1974-08-17
1975	1975-07-08	1975-08-21
1976	1976-05-09	1976-07-17
1977	1977-06-10	1977-07-12
1978	1978-07-29	1978-07-30
1979	1979-05-20	1979-06-04
1980	1980-07-26	1980-08-03
1981	1981-07-09	1981-08-06
1982	1982-06-01	1982-08-12
1983	1983-07-06	1983-08-27
1984	1984-06-20	1984-08-03
1985	1985-07-14	1985-10-04
1986	1986-06-15	1986-08-10
1987	1987-06-29	1987-09-21
1988	1988-07-23	1988-08-18
1989	1989-06-21	1989-08-22
1990	1990-06-26	1990-08-29
1991	1991-07-02	1991-09-04
1992	1992-06-30	1992-08-28
1993	1993-05-26	1993-08-22
1994	1994-06-24	1994-08-22
1995	1995-06-30	1995-08-22
1996	1996-05-31	1996-08-10
1997	1997-05-16	1997-09-01
1998	1998-05-12	1998-08-18
1999	1999-05-27	1999-09-13
2000	2000-06-03	2000-08-20
2001	2001-06-26	2001-08-26
2002	2002-06-17	2002-08-20

Every Fixed Threshold

Fixed thresholds at Heilbronn
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	55	28	1964	11
35 C (95 F): Days	22	6	1952	1
90 F (32.2 C): Days	43	16	1964	2
0 C (32 F): Ice days (max	54	47	1963	13
0 C (32 F): Frost days (min	55	108	1955	47
-10 C (14 F): Days with min	45	37	1963	5
-20 C (-4 F): Days with min	3	3	1956	2
20 C (68 F): Tropical nights (min	18	5	1952	1
10 mm (0.39 in): Days with 10 mm or more rain	55	44	1965	25
25 mm (0.98 in): Days with 25 mm or more rain	44	6	1992	6
50 mm (1.97 in): Days with 50 mm or more rain	8	2	1978	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1948.

Download the Data

Data for Heilbronn 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).

Heilbronn Threshold Days by Year (GME00123562)

Key Facts for Heilbronn Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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