Lettau 06Z temperature 1986 - -14.8 -27.0 -31.7 -25.7 -34.1 -40.0 -42.8 -46.5 -29.5 -15.2 - 1987 -4.8 -16.7 -32.6 -37.7 -34.8 -31.4 -33.3 -39.4 -36.9 -25.3 -17.3 -5.5 1988 -7.1 -16.9 -30.4 -31.6 -32.8 -34.2 -35.7 -26.6 -34.3 -21.2 -19.3 -5.6 1989 -5.6 -18.1 -26.5 -28.4 -35.0 -46.1 -38.4 -38.7 -35.2 -24.8 -12.8 - 1990 -6.2 -17.7 -28.9 -31.5 -34.8 -34.6 -41.6 -40.5 -40.7 -28.1 -14.6 -4.3 1991 -7.3 -12.5 -30.1 -29.4 -33.7 -31.4 -40.7 - - - -13.4 -4.1 1992 -5.6 -16.4 -21.8 -38.3 -30.2 -35.4 - - - - -13.8 -5.1 1993 -5.0 -15.1 -28.9 -31.9 -41.6 - - - - - -14.6 -8.4 1994 -7.4 -16.8 -31.8 -28.4 -42.7 -35.5 -35.0 -42.1 -45.5 -24.5 -13.4 -4.5 1995 -6.7 -14.4 -28.4 -37.4 -40.8 -30.5 - - - - -12.3 -4.0 1996 -5.3 - - - - - - - - - - -4.0 1997 - - - - - - - - - - - - 1998 - - -28.0 -40.2 -33.9 - - - - - - - 1999 - - -32.4 -40.4 -38.5 -38.5 -31.7 -41.6 -28.9 -24.6 - - 2000 - - -23.1 -30.4 -34.9 -35.9 -32.7 -35.4 -36.6 -27.6 - - 2001 - - -29.9 -30.1 -36.4 -30.3 -32.3 -48.9 -33.5 -25.3 - - 2002 - - -21.9 -33.5 -27.4 -42.1 -42.9 -40.5 -31.3 -23.8 - - 2003 - - -26.6 -32.5 -31.1 -33.2 -33.1 -44.6 -36.0 -22.6 - - 2004 - - -29.6 -31.2 -38.8 -33.4 -48.9 -45.4 -40.1 -28.9 - - 2005 - - -26.7 -37.5 -29.8 -34.7 -32.6 -40.0 -34.9 -24.4 - - 2006 - - -28.2 -40.2 -44.1 -31.6 -41.3 -31.1 -33.4 -27.8 - - 2007 - -14.6 - - -33.1 -32.7 -35.0 -37.9 -34.8 -31.5 -15.0 -5.7 2008 -5.8 -17.3 -26.5 -34.1 -33.9 -31.5 -40.8 -49.3 - - - - 2009 - -20.2 -29.5 -27.7 -38.8 -42.1 -37.4 -41.4 -41.3 -28.6 -11.4 -6.0 2010 -8.8 -16.0 -30.5 -33.7 -39.2 -40.0 -41.9 -40.0 - -29.6 -13.7 -7.0 2011 -8.1 -16.6 -26.4 -31.1 -31.4 -32.4 - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - -14.5 -27.2 -37.8 -31.5 -39.2 -44.4 -27.7 -26.0 -21.0 -18.2 -9.2 2015 -7.7 -13.1 -26.5 -36.1 -34.1 -36.4 -41.4 -39.3 -39.0 -25.2 -15.6 -7.0 2016 -4.3 -16.2 -28.4 -35.9 -33.6 -40.6 -43.8 -38.5 -36.2 -26.0 -15.5 -6.9 2017 -7.0 -16.9 -26.4 -23.7 -25.2 -34.8 -39.5 -32.6 -40.7 -26.7 -17.7 - 2018 -7.5 -17.1 -23.1 -31.5 -36.8 -34.0 -36.2 -44.6 -35.0 -21.4 -11.7 -5.0 2019 -8.3 -13.3 -26.2 -33.9 -30.5 -32.3 -33.2 -32.0 -28.8 -24.4 -13.9 -5.8 2020 -8.8 -11.3 -27.0 -33.9 -29.6 -34.3 -35.5 -36.1 -37.3 -24.2 -17.0 -6.9 2021 -7.4 -16.1 -30.3 -39.5 -35.5 -32.6 -33.7 -49.3 -36.4 -26.0 -13.7 -6.0 2022 -6.9 -13.7 -25.8 -31.3 -26.7 -35.7 -28.8 -34.7 -36.4 -26.9 -19.8 -6.8 2023 -8.0 -15.2 -28.4 -35.4 -40.0 -32.5 -45.7 -48.5 -24.0 -29.1 -16.3 -8.2 2024 -7.3 -17.9 -25.2 -29.0 -32.9 -29.7 -35.6 -35.6 -40.4 - - -