Jena Sternwarte Threshold Days by Year (GM000004204)

14 fixed thresholds counted per year at Jena Sternwarte (GM000004204): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jena Sternwarte Thresholds

Jena Sternwarte: nights with a minimum temperature at or below 0 C (32 F) in 197 years, most in 1879 with 142.
Jena Sternwarte: days with a maximum temperature at or below 0 C (32 F) in 195 years, most in 1829 with 69.
Jena Sternwarte: days with 10 mm (0.39 in) or more of precipitation in 190 years, most in 2002 with 24.
Jena Sternwarte: days with a maximum temperature at or above 30 C (86 F) in 184 years, most in 2018 with 37.
14 fixed thresholds have at least one qualifying day at Jena Sternwarte.

Days at or above 30 C (86 F)

184 years with a qualifying day

Days per year at Jena Sternwarte with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 37 in 2018.

Days at or above 30 C (86 F) per year at Jena Sternwarte
Year	Days	Decade average
1824	1	6.8
1825	9	6.8
1826	11	6.8
1827	8	6.8
1828	5	6.8
1829	7	6.8
1830	6	3.3
1832	4	3.3
1833	3	3.3
1834	7	3.3
1835	2	3.3
1836	1	3.3
1837	1	3.3
1838	2	3.3
1839	4	3.3
1841	2	4.7
1842	7	4.7
1845	4	4.7
1846	7	4.7
1847	5	4.7
1848	4	4.7
1849	4	4.7
1852	1	3.1
1853	2	3.1
1854	1	3.1
1856	1	3.1
1857	8	3.1
1858	2	3.1
1859	7	3.1
1861	4	5
1862	2	5
1863	4	5
1865	7	5
1867	3	5
1868	10	5
1869	5	5
1871	2	5.2
1872	9	5.2
1873	3	5.2
1874	5	5.2
1879	7	5.2
1880	12	10.5
1881	16	10.5
1882	6	10.5
1883	7	10.5
1884	9	10.5
1885	8	10.5
1886	13	10.5
1887	9	10.5
1888	12	10.5
1889	13	10.5
1890	6	9.4
1891	6	9.4
1892	19	9.4
1893	10	9.4
1894	6	9.4
1895	17	9.4
1896	4	9.4
1897	6	9.4
1898	10	9.4
1899	10	9.4
1900	14	12.7
1901	8	12.7
1902	11	12.7
1903	9	12.7
1904	20	12.7
1905	22	12.7
1906	16	12.7
1907	8	12.7
1908	13	12.7
1909	6	12.7
1910	6	11.5
1911	31	11.5
1912	6	11.5
1914	10	11.5
1915	8	11.5
1917	10	11.5
1918	6	11.5
1919	15	11.5
1920	4	8.2
1921	16	8.2
1922	8	8.2
1923	10	8.2
1924	4	8.2
1925	8	8.2
1926	1	8.2
1927	6	8.2
1928	10	8.2
1929	15	8.2
1930	7	10.8
1931	10	10.8
1932	17	10.8
1933	11	10.8
1934	11	10.8
1935	16	10.8
1936	9	10.8
1937	9	10.8
1938	12	10.8
1939	6	10.8
1941	9	15.2
1942	12	15.2
1943	19	15.2
1944	16	15.2
1945	6	15.2
1946	11	15.2
1947	33	15.2
1948	15	15.2
1949	16	15.2
1950	16	9.7
1951	8	9.7
1952	11	9.7
1953	10	9.7
1954	7	9.7
1955	3	9.7
1957	13	9.7
1958	8	9.7
1959	11	9.7
1960	5	9.3
1961	14	9.3
1962	4	9.3
1963	8	9.3
1964	21	9.3
1965	4	9.3
1966	6	9.3
1967	10	9.3
1968	5	9.3
1969	16	9.3
1970	10	11.4
1971	18	11.4
1972	11	11.4
1973	16	11.4
1974	5	11.4
1975	14	11.4
1976	20	11.4
1977	3	11.4
1978	7	11.4
1979	10	11.4
1980	3	9.4
1981	7	9.4
1982	16	9.4
1983	18	9.4
1984	6	9.4
1985	5	9.4
1986	13	9.4
1987	4	9.4
1988	10	9.4
1989	12	9.4
1990	16	12.5
1991	9	12.5
1992	21	12.5
1993	3	12.5
1994	23	12.5
1995	16	12.5
1996	4	12.5
1997	13	12.5
1998	11	12.5
1999	9	12.5
2000	9	16.5
2001	13	16.5
2002	12	16.5
2003	32	16.5
2004	10	16.5
2005	18	16.5
2006	26	16.5
2007	17	16.5
2008	17	16.5
2009	11	16.5
2010	18	21.5
2011	15	21.5
2012	20	21.5
2013	16	21.5
2014	11	21.5
2015	28	21.5
2016	21	21.5
2017	17	21.5
2018	37	21.5
2019	32	21.5
2020	19	22.9
2021	13	22.9
2022	26	22.9
2023	23	22.9
2024	30	22.9
2025	18	22.9
2026	31	22.9

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

First to last qualifying date each year at Jena Sternwarte
Year	First date	Last date
1824	1824-07-10	1824-07-10
1825	1825-07-16	1825-09-21
1826	1826-06-29	1826-09-02
1827	1827-05-31	1827-08-03
1828	1828-06-21	1828-07-08
1829	1829-06-24	1829-07-26
1830	1830-06-26	1830-08-05
1832	1832-07-12	1832-08-22
1833	1833-06-11	1833-06-30
1834	1834-05-13	1834-07-31
1835	1835-07-05	1835-08-12
1836	1836-07-29	1836-07-29
1837	1837-08-11	1837-08-11
1838	1838-07-14	1838-07-15
1839	1839-06-15	1839-07-19
1841	1841-06-26	1841-07-18
1842	1842-07-05	1842-08-25
1845	1845-07-03	1845-07-08
1846	1846-07-05	1846-08-06
1847	1847-05-24	1847-08-19
1848	1848-06-17	1848-08-29
1849	1849-06-05	1849-07-09
1852	1852-07-17	1852-07-17
1853	1853-07-08	1853-08-23
1854	1854-07-25	1854-07-25
1856	1856-08-14	1856-08-14
1857	1857-05-21	1857-08-05
1858	1858-06-10	1858-06-13
1859	1859-07-03	1859-08-08
1861	1861-06-21	1861-08-13
1862	1862-06-07	1862-06-08
1863	1863-06-26	1863-08-28
1865	1865-07-07	1865-07-21
1867	1867-06-03	1867-08-20
1868	1868-05-25	1868-08-18
1869	1869-07-13	1869-07-31
1871	1871-07-11	1871-09-03
1872	1872-07-23	1872-09-06
1873	1873-07-27	1873-08-26
1874	1874-06-02	1874-07-20
1879	1879-07-30	1879-08-21
1880	1880-05-26	1880-09-05
1881	1881-06-05	1881-08-09
1882	1882-05-04	1882-08-13
1883	1883-05-26	1883-08-14
1884	1884-05-12	1884-08-10
1885	1885-05-29	1885-07-12
1886	1886-05-19	1886-09-03
1887	1887-07-04	1887-08-28
1888	1888-05-17	1888-08-12
1889	1889-05-23	1889-07-11
1890	1890-07-15	1890-08-19
1891	1891-06-29	1891-09-14
1892	1892-05-25	1892-08-25
1893	1893-06-19	1893-08-23
1894	1894-07-02	1894-08-07
1895	1895-06-19	1895-09-07
1896	1896-06-03	1896-07-22
1897	1897-06-24	1897-08-06
1898	1898-08-06	1898-09-10
1899	1899-07-13	1899-09-05
1900	1900-05-07	1900-08-24
1901	1901-06-01	1901-08-11
1902	1902-05-29	1902-09-04
1903	1903-06-29	1903-09-07
1904	1904-05-17	1904-08-31
1905	1905-05-30	1905-09-07
1906	1906-06-27	1906-09-05
1907	1907-05-11	1907-08-15
1908	1908-05-22	1908-07-29
1909	1909-05-23	1909-08-16
1910	1910-06-04	1910-08-21
1911	1911-06-06	1911-09-13
1912	1912-06-29	1912-07-28
1914	1914-07-02	1914-08-11
1915	1915-06-07	1915-07-23
1917	1917-05-14	1917-07-29
1918	1918-05-22	1918-08-23
1919	1919-06-08	1919-09-14
1920	1920-07-07	1920-08-05
1921	1921-06-04	1921-08-11
1922	1922-05-22	1922-08-30
1923	1923-05-06	1923-08-15
1924	1924-05-15	1924-07-22
1925	1925-06-12	1925-08-10
1926	1926-07-19	1926-07-19
1927	1927-05-31	1927-08-01
1928	1928-06-10	1928-09-09
1929	1929-06-20	1929-09-05
1930	1930-06-12	1930-08-27
1931	1931-05-24	1931-08-06
1932	1932-05-20	1932-08-27
1933	1933-07-09	1933-08-10
1934	1934-04-17	1934-08-23
1935	1935-06-10	1935-08-12
1936	1936-06-18	1936-08-18
1937	1937-05-21	1937-08-08
1938	1938-06-08	1938-08-08
1939	1939-06-07	1939-08-22
1941	1941-06-24	1941-07-26
1942	1942-06-07	1942-09-03
1943	1943-05-14	1943-09-14
1944	1944-05-30	1944-08-28
1945	1945-06-06	1945-07-22
1946	1946-06-08	1946-08-10
1947	1947-05-31	1947-09-20
1948	1948-06-09	1948-09-11
1949	1949-05-29	1949-09-06
1950	1950-05-21	1950-08-26
1951	1951-06-15	1951-09-13
1952	1952-06-30	1952-08-14
1953	1953-05-19	1953-09-02
1954	1954-06-19	1954-09-02
1955	1955-04-30	1955-07-18
1957	1957-06-17	1957-08-09
1958	1958-06-17	1958-09-15
1959	1959-06-06	1959-08-22
1960	1960-07-30	1960-08-27
1961	1961-06-25	1961-09-18
1962	1962-06-15	1962-09-03
1963	1963-06-28	1963-08-06
1964	1964-05-13	1964-09-15
1965	1965-06-25	1965-08-20
1966	1966-06-05	1966-08-13
1967	1967-06-23	1967-08-02
1968	1968-04-21	1968-07-02
1969	1969-05-13	1969-08-06
1970	1970-06-21	1970-09-10
1971	1971-05-12	1971-08-20
1972	1972-06-05	1972-08-14
1973	1973-06-13	1973-09-09
1974	1974-08-04	1974-08-17
1975	1975-07-08	1975-09-18
1976	1976-05-09	1976-08-29
1977	1977-06-10	1977-07-12
1978	1978-06-02	1978-08-01
1979	1979-05-29	1979-09-02
1980	1980-06-14	1980-08-03
1981	1981-06-02	1981-08-07
1982	1982-05-27	1982-09-17
1983	1983-06-08	1983-08-21
1984	1984-07-09	1984-08-03
1985	1985-05-27	1985-08-14
1986	1986-06-16	1986-08-07
1987	1987-06-29	1987-07-17
1988	1988-07-01	1988-08-19
1989	1989-06-26	1989-09-19
1990	1990-06-27	1990-08-30
1991	1991-07-07	1991-08-22
1992	1992-06-29	1992-08-29
1993	1993-06-10	1993-08-15
1994	1994-06-25	1994-08-10
1995	1995-07-08	1995-08-23
1996	1996-05-31	1996-06-08
1997	1997-05-17	1997-09-01
1998	1998-06-06	1998-08-17
1999	1999-05-28	1999-09-14
2000	2000-06-10	2000-08-17
2001	2001-06-27	2001-08-26
2002	2002-06-17	2002-08-20
2003	2003-05-05	2003-09-20
2004	2004-07-17	2004-08-12
2005	2005-05-02	2005-09-09
2006	2006-06-13	2006-09-07
2007	2007-05-21	2007-08-07
2008	2008-05-30	2008-08-07
2009	2009-07-02	2009-09-01
2010	2010-06-06	2010-08-22
2011	2011-05-30	2011-09-11
2012	2012-04-28	2012-09-10
2013	2013-06-18	2013-09-07
2014	2014-06-07	2014-08-02
2015	2015-06-05	2015-08-31
2016	2016-05-22	2016-09-14
2017	2017-05-18	2017-08-30
2018	2018-05-28	2018-09-20
2019	2019-06-02	2019-08-31
2020	2020-06-13	2020-09-16
2021	2021-05-10	2021-08-15
2022	2022-05-19	2022-08-26
2023	2023-06-19	2023-09-17
2024	2024-06-26	2024-09-08
2025	2025-06-14	2025-09-20
2026	2026-05-26	2026-08-27

Every Fixed Threshold

Fixed thresholds at Jena Sternwarte
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	184	37	2018	31
35 C (95 F): Days	63	9	2015	9
90 F (32.2 C): Days	154	25	1911	17
100 F (37.8 C): Days	9	3	1943	2
0 C (32 F): Ice days (max	195	69	1829	7
0 C (32 F): Frost days (min	197	142	1879	55
-10 C (14 F): Days with min	183	48	1940	2
-20 C (-4 F): Days with min	60	14	1838	1
-30 C (-22 F): Days with min	2	1	1830	1
20 C (68 F): Tropical nights (min	17	3	2015	4
10 mm (0.39 in): Days with 10 mm or more rain	190	24	2002	8
25 mm (0.98 in): Days with 25 mm or more rain	148	5	1956	4
50 mm (1.97 in): Days with 50 mm or more rain	30	2	1909	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1997	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1824.

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Data for Jena Sternwarte 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 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Jena Sternwarte Threshold Days by Year (GM000004204)

Key Facts for Jena Sternwarte Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

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