from https://www.dwd.de/EN/ourservices/zeitreihen/zeitreihen.html?nn=24778#buehneTop
January annual temperature in Germany
1881	-5.4
1882	0.4
1883	-0.3
1884	2.9
1885	-2.8
1886	-1.3
1887	-3.7
1888	-1.9
1889	-2.4
1890	2.0
1891	-4.5
1892	-1.8
1893	-7.3
1894	-1.8
1895	-4.0
1896	-0.8
1897	-2.9
1898	2.3
1899	2.1
1900	0.7
1901	-3.7
1902	2.8
1903	0.3
1904	-1.3
1905	-1.8
1906	1.0
1907	-0.3
1908	-2.2
1909	-1.6
1910	1.4
1911	-1.1
1912	-1.5
1913	-0.2
1914	-3.0
1915	0.2
1916	3.8
1917	-2.6
1918	0.7
1919	0.7
1920	2.3
1921	4.2
1922	-2.7
1923	1.5
1924	-2.9
1925	2.5
1926	0.0
1927	1.8
1928	1.6
1929	-4.7
1930	2.3
1931	0.2
1932	1.8
1933	-2.6
1934	0.5
1935	-0.8
1936	3.1
1937	-0.8
1938	1.7
1939	2.6
1940	-9.0
1941	-5.4
1942	-7.9
1943	-0.4
1944	3.1
1945	-4.0
1946	-1.8
1947	-4.7
1948	3.1
1949	1.2
1950	-1.0
1951	1.5
1952	0.2
1953	-0.8
1954	-3.2
1955	-1.7
1956	0.2
1957	0.3
1958	-0.4
1959	-0.1
1960	-0.1
1961	-0.8
1962	1.7
1963	-7.4
1964	-2.6
1965	1.2
1966	-2.7
1967	0.7
1968	-1.1
1969	0.5
1970	-2.6
1971	-1.1
1972	-2.3
1973	0.0
1974	3.3
1975	4.5
1976	1.2
1977	0.4
1978	0.8
1979	-4.5
1980	-2.7
1981	-1.5
1982	-2.3
1983	4.0
1984	1.1
1985	-5.5
1986	0.1
1987	-5.9
1988	3.5
1989	2.5
1990	2.5
1991	1.5
1992	1.0
1993	2.5
1994	3.0
1995	0.2
1996	-2.8
1997	-2.6
1998	2.4
1999	2.6
2000	1.1
2001	0.9
2002	1.2
2003	-0.3
2004	-0.1
2005	2.0
2006	-2.6
2007	4.8
2008	3.7
2009	-2.2
2010	-3.7
2011	1.0
2012	1.9
2013	0.2
2014	2.1
2015	2.2
2016	1.0
2017	-2.2
2018	3.7
2019	0.6
2020	3.5
2021	0.6
2022	2.8