D_47 12Z temperature 1983 - -16.5 - - -28.1 - - - - - -22.0 - 1984 - -19.1 -21.9 -30.7 -27.1 -33.8 -33.9 -27.9 -29.6 -28.7 -23.8 -14.0 1985 -13.8 -19.1 -24.7 -30.4 - - - - - - - -16.7 1986 -14.9 -14.7 -21.5 -28.0 -31.7 - - - - - - -15.6 1987 -12.7 - -24.5 - -32.1 -24.6 -29.9 -33.4 -28.5 -24.4 -21.6 -15.1 1988 -13.7 - - -26.6 - - - - - - - - 1989 - -19.7 -26.6 - -29.8 - - - -25.3 -26.5 -22.7 -13.6 1990 -14.1 -20.1 -27.2 - - - - - - - - - 1991 - - - - - - - - - - - - 1992 - -18.3 -24.5 -27.4 -30.1 -27.0 - - - -31.2 -19.8 -16.7 1993 -12.7 -17.6 -22.8 -27.5 -30.8 -33.8 - - - - - - 1994 - - - - - - - -34.7 -26.2 -26.5 - - 1995 - - - - - - - - - - - - 1996 - - - - - - - - - - - - 1997 - - - - - - - - - - - - 1998 - - - - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - - - - - - - - - - - 2002 - - - - - - - - - - - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - -20.0 -26.3 -30.1 - - - -31.7 - - - -13.1 2006 - -18.7 - - - - - - - - - - 2007 - -19.6 -22.1 - - - - - - - - - 2008 -14.9 - - - - - - - - - - -14.9 2009 - - -25.7 -30.1 -29.3 -29.2 -25.4 -28.9 -27.8 -29.5 -21.5 -15.4 2010 - -19.1 -24.9 -30.2 -29.8 -32.2 -33.4 -30.0 -33.4 -26.0 -19.9 -13.6 2011 -12.9 -20.7 -24.7 -26.5 -30.9 -30.2 -32.4 -29.5 -27.5 -26.4 -20.3 -14.3 2012 -15.2 -19.2 -25.0 -29.2 -27.7 -28.7 -32.0 -28.3 -30.7 -27.7 -20.3 -13.9 2013 -12.7 -20.2 -25.3 -31.0 -29.8 -30.5 -33.9 -29.1 -25.1 -26.5 -21.7 -12.8 2014 -12.3 -19.0 -24.9 -27.1 -31.3 -33.5 -28.4 -33.3 -31.8 -27.7 -19.4 -14.6 2015 - - -22.5 -29.6 -28.8 -31.6 -31.8 -31.5 -32.9 -31.4 -22.1 -14.2 2016 -15.1 -20.4 -24.2 -29.9 -24.6 -29.8 -29.6 -29.8 -30.3 -25.7 -17.5 -14.7 2017 -13.0 -15.1 -26.0 -29.5 -30.1 -33.6 -31.6 -33.4 -28.6 -27.4 -20.1 -15.5 2018 -13.9 -18.7 -25.3 -23.5 -31.4 -32.9 -28.8 -29.1 -31.4 -28.5 -20.9 -14.6 2019 -15.0 -18.3 -21.9 -27.7 -30.3 -31.7 -26.0 -31.1 -31.4 -27.3 -18.4 -13.1 2020 -12.7 -19.7 -26.9 -24.0 -30.3 -32.1 -27.6 -32.3 -29.9 -27.8 -21.1 -13.8 2021 -14.6 -20.7 -25.5 -31.2 -32.5 -30.3 -31.3 -25.9 -29.4 -24.1 -21.8 -14.9 2022 -16.4 -18.5 -22.9 -29.3 -28.9 -30.1 -28.6 -32.6 -28.0 -25.7 -19.8 -15.1 2023 -15.9 -17.2 -21.6 -25.2 -30.8 -29.2 -31.4 -31.7 -29.3 -29.4 -21.0 -15.3 2024 -15.8 -20.4 -24.7 -33.4 -31.2 -32.3 -27.2 -29.6 -30.5 -27.1 -20.1 -