Lettau 06Z temperature 1986 - -14.8 -27.0 -31.7 -25.7 -34.1 -40.0 -42.8 -46.5 -29.5 -15.2 -6.7 1987 -4.8 -16.7 -32.6 -37.7 -34.8 -31.4 -33.3 -39.4 -36.9 -25.3 -17.2 -5.3 1988 -6.9 -16.9 -30.4 -31.6 -32.8 -34.2 -35.7 -26.6 -34.3 -21.2 -15.0 -5.7 1989 -5.6 -17.9 -26.5 -28.4 -35.0 -46.1 -38.4 -38.7 -35.2 -24.8 -12.7 -4.4 1990 -6.2 -17.7 -28.9 -31.5 -34.8 -34.6 -41.6 -40.5 -40.7 -28.1 -14.6 -4.2 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 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - -37.6 -29.8 - -32.4 -39.4 - -23.7 - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -