Neumayer 12Z 500hPa temperature 1983 - - -33.1 -36.3 -34.8 -38.0 -40.2 -39.2 -38.1 -36.4 -34.8 -32.0 1984 -29.0 -32.4 -31.7 -34.3 -35.7 -38.8 -37.9 -37.5 -38.6 -37.5 -34.6 -30.2 1985 -29.1 -29.0 -30.8 -34.3 -38.5 -38.9 -37.8 -35.7 -37.0 -37.4 -37.1 -30.8 1986 -28.8 -28.6 -31.2 -34.9 -37.4 -37.8 -35.7 -39.7 -38.8 -39.4 -32.2 -31.8 1987 -28.2 -30.6 -33.0 -33.6 -37.2 -37.3 -39.1 -38.7 - - - - 1988 -28.7 -32.5 -29.8 -35.2 -37.3 -39.9 -40.6 -37.7 -37.6 -36.6 -31.6 -28.3 1989 -26.5 -30.2 -32.0 -34.6 -37.6 -35.2 -37.5 -40.3 -37.2 -35.7 -31.3 -32.8 1990 - - -31.8 -33.9 -36.6 -36.4 -37.7 -39.8 -37.8 -33.5 -31.6 -30.2 1991 -30.3 -29.5 -35.0 -33.9 -36.8 -37.6 -40.2 -37.8 -38.2 -36.1 -34.0 -29.7 1992 -28.5 -31.5 -34.1 -36.2 -35.9 -39.6 -39.3 -41.9 -38.9 -34.7 -33.8 -30.9 1993 -32.2 -33.3 -34.1 -35.6 -37.6 -37.2 -39.2 -38.6 -39.2 -36.9 -31.4 -32.4 1994 -32.4 -30.3 -33.8 -35.2 -37.5 -38.7 -40.5 -38.3 -35.9 -39.3 -33.7 -31.9 1995 -31.4 -32.7 -31.5 -35.5 -38.0 -35.7 -41.0 -39.3 -38.6 -34.4 -34.8 -31.2 1996 -31.0 -27.9 -32.9 -36.0 -35.2 -40.3 -38.5 -37.0 -37.9 -35.7 -32.2 -32.1 1997 -28.5 -30.7 -32.8 -35.1 -37.1 -37.7 -38.8 -40.1 -41.0 -38.9 -34.6 -31.1 1998 -30.4 -30.2 -34.7 -36.1 -37.5 -37.5 -38.8 -38.1 -39.6 -37.3 -35.0 -31.8 1999 -31.3 -29.3 -32.4 -35.6 -36.4 -39.1 -38.1 -38.6 -38.9 -35.1 -33.4 -33.7 2000 -31.7 -31.5 -33.8 -35.6 -36.2 -38.1 -39.0 -40.4 -41.0 -39.7 -35.8 -33.0 2001 -32.6 -33.4 -35.7 -36.5 -36.0 -39.7 -39.7 -39.5 -38.2 -37.9 -34.0 -31.7 2002 -29.3 -29.9 -33.3 -34.6 -38.4 -40.5 -41.0 -37.5 -38.4 -37.3 -35.6 -31.9 2003 -31.9 -30.0 -33.3 -36.8 -37.7 -40.5 -40.1 -38.9 -37.9 -36.5 - -29.2 2004 -29.7 -34.2 -33.7 -37.7 -39.0 -38.0 -38.9 -41.5 -35.9 -36.3 -35.8 -33.5 2005 -28.0 -32.3 -32.6 -32.5 -39.5 -40.3 -40.6 -37.7 -40.7 -36.6 -34.6 -32.8 2006 -30.1 -33.5 -29.9 -35.7 -38.9 -36.7 -38.7 -41.6 -39.0 -36.7 -31.7 -31.5 2007 -28.8 -31.8 -33.7 -35.3 -37.7 -38.6 -38.9 -39.4 -39.3 -36.7 -31.3 -31.4 2008 -31.8 -32.9 -33.5 -33.4 -37.5 -40.2 -40.2 -40.9 -36.8 -37.1 -34.7 -34.0 2009 -32.1 -31.3 -32.4 -37.7 -36.2 -38.3 -37.4 -40.1 -39.2 -36.9 -35.1 -30.6 2010 -29.5 -31.8 -34.1 -34.9 -34.9 -36.2 -39.1 -37.7 -35.1 -35.0 -32.7 -30.2 2011 -29.6 -32.2 -32.0 -34.5 -36.1 -38.0 -37.5 -40.3 -38.4 -37.1 -35.3 -33.7 2012 -31.5 -30.5 -33.4 -33.8 -37.9 -37.9 -38.9 -40.6 -39.2 -35.4 -33.0 -30.0 2013 -28.9 -32.3 -34.3 -33.6 -36.2 -34.6 -39.5 -38.6 -36.2 -36.5 -36.3 -31.0 2014 -30.9 -31.7 -33.1 -34.8 -34.9 -38.1 -38.1 -38.9 -39.5 -38.0 -35.5 -33.7 2015 -33.6 - -34.5 -34.5 -36.7 -39.4 -39.4 -40.0 -40.4 -35.4 -34.5 -31.3 2016 -30.0 -31.1 -32.2 -33.5 -37.9 -39.7 -39.7 -37.9 -37.3 -38.1 -32.7 -31.7 2017 -30.7 -33.6 -33.4 -37.4 -35.8 -40.2 -41.2 -39.4 -37.0 -33.8 -34.7 -29.7 2018 -30.5 -32.2 -30.3 -33.9 -35.6 -36.8 -39.4 -38.6 -37.0 -38.3 -30.9 -31.1 2019 -30.9 -30.5 -33.4 -34.3 -33.7 -38.7 -42.3 -40.2 -38.1 -35.2 -35.0 -29.5 2020 -31.0 -30.5 -34.0 -33.6 -38.5 -39.0 -42.5 -41.5 -37.3 -38.0 -33.9 -31.2 2021 -30.5 -29.4 -30.5 -37.5 -35.8 -40.2 -39.4 -43.2 -37.5 -35.2 -34.2 -32.3 2022 -29.5 -31.0 -32.8 -34.2 -35.6 -38.2 -37.6 -40.7 -36.9 -35.6 -34.0 -31.8 2023 -29.1 - - - - - - - - - - - 2024 - - - - - - - - - - - -