Lettau wind_speed 1986 - 8.0 6.3 10.0 11.1 11.0 9.6 8.3 7.2 9.6 4.2 6.7 1987 8.9 6.6 5.8 5.2 8.1 8.3 5.8 7.3 4.8 0.2 - 8.3 1988 8.3 6.5 8.8 9.7 8.1 10.5 9.4 13.5 8.0 12.4 5.2 6.6 1989 8.1 5.4 7.9 9.1 8.9 5.9 9.4 10.1 11.0 11.7 11.9 6.4 1990 7.0 5.5 7.0 8.7 6.1 11.3 6.8 9.2 8.1 8.4 6.7 10.7 1991 5.6 6.5 8.5 9.4 9.8 7.4 - - - - 8.3 7.3 1992 6.4 8.5 7.9 6.6 9.1 9.3 - - - - 8.1 6.8 1993 6.9 6.3 9.0 7.3 6.4 - - - - - 7.1 4.4 1994 7.8 6.9 8.4 8.3 8.4 9.8 8.2 - - - 6.7 7.1 1995 5.8 8.2 7.4 6.8 7.7 11.6 - - - - 12.3 9.2 1996 8.3 - - - - - - - - - - 7.4 1997 - - - - - - - - - - - - 1998 - - 8.3 6.1 9.5 - - - - - - - 1999 - 6.7 6.4 7.4 8.3 7.0 10.7 - - 9.1 - - 2000 - - 8.7 10.0 8.6 10.6 12.5 8.0 11.1 - - - 2001 - - - - - 10.0 7.3 - - - - - 2002 - - - - - - - - - - - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - 6.0 - - 9.0 14.3 10.2 - - 7.2 7.3 9.2 2008 7.3 8.0 6.7 7.3 10.7 10.1 9.7 6.4 - - - - 2009 - 4.6 6.8 9.9 7.4 6.6 8.0 5.0 3.7 10.3 10.6 6.3 2010 4.3 6.1 6.6 5.9 7.3 7.8 11.0 9.3 - - 10.3 8.1 2011 4.9 8.8 8.4 9.3 8.4 8.8 - - - - - - 2012 - - - - - - - - - - - - 2013 - - - - - - - - - - - - 2014 - 10.4 9.4 8.1 9.7 8.3 7.6 14.8 12.6 12.5 5.7 6.6 2015 7.1 8.7 8.1 - 8.2 10.3 9.2 10.5 14.4 12.0 11.7 9.1 2016 8.5 9.8 6.3 7.3 8.2 6.7 6.8 8.9 - 10.7 8.4 8.0 2017 6.9 6.4 5.9 8.2 - 10.2 10.5 13.6 9.1 10.1 8.8 6.0 2018 6.0 6.9 10.9 7.3 8.5 11.0 9.3 5.8 12.1 - 10.1 9.0 2019 6.2 8.7 9.3 8.9 9.7 10.7 9.4 10.6 14.0 10.0 8.8 7.5 2020 6.8 7.1 9.0 9.9 9.9 - 7.7 9.4 9.1 11.7 7.6 8.1 2021 9.6 9.0 8.2 9.7 9.1 8.6 7.6 4.9 9.4 11.1 10.9 10.2 2022 8.3 8.8 9.0 8.1 9.0 8.8 11.5 - 10.1 11.6 7.4 8.5 2023 6.4 8.1 8.9 7.5 7.3 12.2 6.2 6.2 12.9 - - - 2024 9.8 7.1 - - - - - - - - - -