from https://www.dwd.de/EN/ourservices/zeitreihen/zeitreihen.html?nn=24778#buehneTop
January annual temperature in Germany
1881	28.7
1882	25.8
1883	42.2
1884	68.4
1885	24.2
1886	54.8
1887	5.8
1888	39.6
1889	18.2
1890	83.5
1891	50.1
1892	66.4
1893	44.8
1894	29.0
1895	65.3
1896	38.9
1897	35.3
1898	35.7
1899	83.6
1900	97.6
1901	45.1
1902	61.3
1903	45.8
1904	38.4
1905	52.7
1906	72.9
1907	60.5
1908	38.8
1909	36.5
1910	69.8
1911	27.9
1912	57.7
1913	53.9
1914	44.3
1915	94.0
1916	86.1
1917	61.8
1918	73.0
1919	32.6
1920	90.6
1921	98.0
1922	72.4
1923	59.6
1924	27.2
1925	55.6
1926	67.0
1927	54.9
1928	58.9
1929	32.7
1930	34.7
1931	89.9
1932	59.4
1933	30.4
1934	47.8
1935	58.3
1936	71.3
1937	61.5
1938	104.4
1939	75.4
1940	28.3
1941	65.8
1942	41.7
1943	48.4
1944	83.2
1945	44.6
1946	41.9
1947	35.3
1948	106.9
1949	38.3
1950	48.5
1951	77.2
1952	74.6
1953	34.4
1954	66.2
1955	62.2
1956	68.3
1957	43.1
1958	73.8
1959	66.5
1960	65.3
1961	61.8
1962	70.5
1963	25.5
1964	22.3
1965	89.2
1966	50.0
1967	60.9
1968	89.2
1969	50.1
1970	44.4
1971	33.3
1972	17.7
1973	32.2
1974	56.9
1975	62.5
1976	117.5
1977	59.6
1978	46.6
1979	48.5
1980	50.0
1981	88.5
1982	80.1
1983	95.6
1984	98.1
1985	60.0
1986	107.5
1987	65.7
1988	76.1
1989	23.4
1990	40.2
1991	46.9
1992	36.0
1993	87.3
1994	93.3
1995	119.0
1996	7.0
1997	11.2
1998	64.4
1999	66.1
2000	54.8
2001	61.1
2002	47.4
2003	82.8
2004	109.4
2005	71.0
2006	26.7
2007	98.2
2008	74.0
2009	33.2
2010	46.8
2011	63.8
2012	105.1
2013	64.4
2014	44.9
2015	85.4
2016	77.3
2017	45.2
2018	101.7
2019	81.8
2020	40.5
2021	80.2
2022	58.2