Marion 18Z temperature 1988 6.6 - - - - - - - 3.6 - 5.1 - 1989 - - - - - - - - - - - - 1990 - 7.5 - - - - - - - 4.2 - - 1991 7.4 - - 7.2 - - - - - - - - 1992 - - - - - - - 3.7 - - - - 1993 - 8.6 - - 5.1 4.3 4.6 4.1 4.3 4.2 5.9 6.6 1994 6.4 - 7.3 6.4 - - 4.3 3.3 - 4.9 4.7 - 1995 - - - 5.0 - 3.8 3.4 3.4 - 4.1 4.6 6.2 1996 7.3 7.5 7.6 7.7 - 5.8 - 4.6 4.0 5.2 5.8 6.3 1997 7.9 8.2 7.2 6.7 6.1 4.9 5.2 3.8 - 5.7 5.2 7.0 1998 8.1 - 7.9 7.2 5.4 4.5 4.4 4.1 3.9 - 7.0 7.9 1999 8.6 7.7 8.5 7.3 - 4.6 5.9 4.3 4.8 5.6 6.2 6.3 2000 7.5 8.9 7.3 - - 5.7 5.6 - 3.3 4.3 6.4 - 2001 7.8 8.5 - 5.8 6.2 5.0 - 4.5 4.3 4.1 - - 2002 - 7.9 7.2 - 6.3 5.1 4.6 5.4 3.4 5.3 5.5 5.8 2003 6.8 7.8 7.5 6.7 - 5.2 4.1 - - - - 6.1 2004 - 7.8 8.0 - - 6.8 - - 2.5 - - 9.3 2005 8.3 10.2 - - 5.2 - - 3.2 - - 5.6 - 2006 7.6 7.4 6.7 5.5 - 3.5 3.8 3.9 3.7 4.8 5.1 6.2 2007 6.8 7.6 - 7.8 - - 4.4 3.3 3.8 4.1 4.4 6.5 2008 6.4 6.6 5.9 5.1 5.5 4.6 3.8 2.6 - 4.2 4.7 5.2 2009 6.2 7.7 - 5.5 5.3 4.7 3.4 4.8 3.0 3.7 4.9 5.0 2010 6.9 7.6 6.3 5.5 4.7 4.7 - 4.3 3.3 4.9 5.6 5.4 2011 - 7.7 - 6.4 5.4 3.5 4.9 5.2 3.1 4.5 5.0 7.9 2012 8.1 7.7 7.5 6.8 5.7 3.7 3.8 4.3 4.1 4.0 5.0 6.7 2013 - - 7.7 6.2 4.6 3.6 4.0 4.4 3.3 3.6 5.2 5.7 2014 8.5 8.0 7.3 5.7 5.3 3.8 2.9 2.4 3.2 4.1 4.5 6.0 2015 7.1 7.4 7.2 6.8 5.2 4.2 3.4 4.4 5.1 4.8 4.8 5.9 2016 6.5 8.1 7.2 6.1 5.2 5.4 4.3 4.4 - 4.3 4.8 6.7 2017 - - - - - - - - 3.5 4.4 5.4 6.2 2018 - 8.3 7.3 - 7.2 5.1 5.3 3.4 3.5 5.2 5.8 7.7 2019 7.5 8.5 7.0 7.3 6.0 5.2 3.9 3.7 4.3 4.8 5.1 7.2 2020 8.1 8.9 8.2 7.1 5.4 5.8 4.6 2.5 3.6 4.8 6.2 6.4 2021 6.4 7.2 7.5 6.3 5.0 5.6 5.0 4.1 4.0 4.9 5.9 5.9 2022 - - - - 6.1 - 4.7 3.8 4.3 - 5.9 7.6 2023 9.2 9.4 7.1 6.8 6.6 4.5 4.7 5.6 - - - - 2024 - 11.5 11.3 - - - - - - - - -