Lettau 18Z wind_speed 1986 - 8.0 6.2 9.7 11.3 11.6 8.6 8.8 7.3 9.9 4.8 6.6 1987 9.6 6.4 5.5 5.1 7.4 8.8 5.7 7.0 5.0 0.1 - 8.7 1988 8.0 6.0 9.3 10.4 8.4 10.8 8.9 13.7 9.4 11.9 6.0 6.3 1989 8.4 4.8 8.0 8.2 9.2 5.8 9.9 11.3 11.1 10.7 12.2 6.0 1990 6.8 5.6 6.4 8.6 6.0 10.5 6.5 9.4 8.1 8.6 6.5 11.2 1991 5.4 6.0 8.0 9.0 10.8 7.7 6.8 - - - 8.3 7.1 1992 6.3 8.5 8.2 6.3 8.5 9.7 - - - - 7.3 7.0 1993 6.9 6.8 9.0 7.0 6.0 - - - - - 6.7 4.5 1994 7.8 7.6 8.0 8.6 8.0 9.1 8.4 - - - 6.2 6.8 1995 5.5 8.0 8.0 7.0 8.4 11.0 - - - - 12.7 8.9 1996 8.5 - - - - - - - - - - 6.7 1997 6.7 - - - - - - - - - - - 1998 - - 8.3 6.5 9.1 - - - - - - - 1999 - 6.3 6.4 6.9 8.1 7.5 9.6 - - 9.6 - - 2000 - - 8.6 10.0 8.3 10.7 12.7 7.7 11.8 - - - 2001 - - - - - 10.3 6.3 - - - - - 2002 - - - - - - - - - - - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - 8.1 13.8 10.6 12.1 9.7 7.0 7.1 9.6 2008 7.2 8.2 6.8 7.5 10.2 10.4 10.3 5.4 - - - - 2009 - 3.9 7.7 9.6 7.3 6.2 7.9 4.6 3.7 9.8 10.6 5.6 2010 4.5 5.8 6.7 5.8 7.7 7.2 9.9 8.6 - - 11.1 8.5 2011 5.0 8.9 8.7 9.7 7.5 8.8 - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - 9.8 9.6 7.1 10.2 8.0 7.5 14.7 13.2 12.2 5.1 5.9 2015 7.0 8.3 8.1 - 8.3 10.7 9.6 11.0 14.8 11.7 11.4 8.2 2016 8.2 9.3 6.1 6.7 7.7 6.8 6.0 8.9 11.7 10.6 8.2 7.6 2017 7.1 6.3 5.8 8.1 - 9.9 10.2 14.2 9.2 10.3 8.8 5.6 2018 6.2 6.6 10.4 7.7 9.3 10.9 9.2 5.7 12.0 - 9.9 9.4 2019 6.0 8.0 9.0 8.5 8.8 10.1 8.7 10.6 15.0 10.6 8.8 7.3 2020 6.8 6.8 8.8 10.3 10.3 - 6.9 8.6 9.5 12.1 7.4 8.1 2021 9.0 9.3 8.1 9.8 8.6 8.9 7.8 4.8 8.8 11.7 11.0 9.8 2022 8.3 9.0 8.1 7.8 8.0 8.3 11.6 12.3 10.6 11.6 6.9 7.9 2023 6.3 8.1 8.6 8.0 6.9 13.1 5.5 5.9 13.5 - - - 2024 9.3 7.1 - - - - - - - - - -