Possession_Island 18Z temperature 1993 0.5 -3.2 -9.7 -16.5 -21.0 -18.7 -19.7 -22.8 -18.9 -15.3 -7.2 -1.8 1994 -0.8 -5.3 -14.6 -13.6 -21.7 -20.0 -18.8 -24.9 -20.2 -14.1 -6.6 -1.8 1995 -0.6 -3.1 -9.9 -17.1 -19.7 -19.5 -19.6 -19.7 -20.2 -14.6 -7.8 -0.7 1996 -0.6 -2.7 -6.7 -13.4 -19.1 -19.2 -21.2 -16.8 -20.3 -17.2 - - 1997 0.0 -2.3 -9.7 -18.9 -19.7 -16.9 -22.5 -25.1 -18.5 -11.0 - - 1998 - -2.9 -12.0 -20.4 -18.6 -16.4 -20.8 -19.2 -20.7 -14.5 - - 1999 0.0 -2.3 -9.5 -17.6 -22.3 -16.9 -17.3 -22.7 -18.5 -14.7 - - 2000 -0.9 -2.9 -8.1 -15.3 -17.2 -19.7 -18.8 -20.4 -18.7 -16.2 - - 2001 -0.9 -2.9 -11.1 -16.9 -18.9 -18.2 -19.6 -24.4 -20.1 -14.6 -7.2 -0.9 2002 0.6 -2.2 -7.4 -15.2 -14.5 -17.8 -22.3 -25.4 -16.7 -14.1 -6.8 -2.0 2003 -0.2 -5.3 -13.7 -19.4 -17.1 -20.3 -19.8 -22.1 -18.8 -13.9 -7.2 -0.5 2004 -0.2 -2.6 -12.2 -17.7 -21.4 -16.5 -25.5 -21.0 -20.5 -15.3 -5.4 -0.1 2005 0.1 -2.6 -8.0 -17.1 -16.4 -18.4 -19.9 -19.1 -20.1 -11.9 -6.4 0.1 2006 -0.4 -2.7 -9.1 -17.5 -20.4 -18.3 -24.2 -16.0 - -15.3 -7.1 -1.2 2007 0.4 -3.2 -9.0 -16.5 -15.8 -18.0 -18.8 - -18.8 -15.7 -6.7 -1.0 2008 -0.8 -5.6 -10.6 -14.2 -19.4 -16.3 -23.2 - -18.2 -14.3 -7.4 -0.7 2009 -0.2 -3.4 -10.7 -15.4 -18.8 -18.6 - -19.5 -19.6 -16.3 -5.3 -0.4 2010 0.1 -2.6 -8.2 -16.4 -20.2 - - - -21.6 -14.6 -6.1 -0.3 2011 0.0 -2.1 -7.1 -14.3 -18.1 - - - -17.6 -15.2 -5.3 -0.9 2012 -0.1 -2.1 -10.4 -17.2 -15.1 - - - -19.5 -15.2 -6.3 -0.1 2013 0.3 -3.5 -10.1 -18.6 -17.1 - - - -16.3 -14.9 -7.2 0.0 2014 0.9 -2.3 -9.4 -16.5 -14.6 - - - -17.1 -13.3 -7.7 -1.8 2015 -0.7 -2.8 -9.9 -20.0 -19.2 - - - -23.1 -13.7 -7.1 0.0 2016 0.0 -3.1 -8.7 -17.5 - - - - - -15.0 -5.2 -0.3 2017 0.1 -1.7 -6.7 -14.4 - - - - -20.5 -13.2 -7.2 -1.4 2018 -0.6 -4.4 -9.1 -14.3 - - - - -19.2 -13.3 -6.1 -1.0 2019 -0.8 -2.8 -6.9 -14.9 -15.8 - - - - -14.2 -5.2 -0.2 2020 0.5 -1.4 -7.2 -16.1 - - - - - -14.8 -7.7 0.0 2021 0.6 -2.0 -6.0 - - - - - -18.6 -13.8 -6.1 -0.2 2022 -0.6 -1.4 -5.7 -14.6 - - - - - -13.6 -7.0 -0.9 2023 -0.5 -3.1 -10.7 -15.2 - - - - - - -7.3 -1.0 2024 -0.7 -3.9 -10.5 - - - - - -19.3 -14.0 -7.2 -