Harry 12Z temperature 1994 - - - - - - - - - - - -9.2 1995 -12.2 -15.9 -26.3 -28.5 -31.3 -24.1 -31.6 -31.1 -29.1 -26.1 -18.7 -11.1 1996 -11.0 -18.2 -26.1 -19.2 - -26.3 - - - - -15.6 - 1997 - - - - - - - - - - - - 1998 - - - - - - - - - - - - 1999 - -20.4 -24.5 -31.5 -29.9 -30.5 -28.0 -33.3 -26.4 -22.0 -16.2 -12.9 2000 -15.3 -17.9 -21.3 -29.0 -29.4 -27.0 -27.2 -30.1 -29.9 -23.8 -16.2 -14.9 2001 -15.0 -16.1 -26.1 -25.2 -27.2 -25.7 -28.9 -37.9 -30.5 -28.3 -19.3 -13.3 2002 -12.6 -17.8 -22.1 -27.7 -25.6 -32.0 -33.1 -33.6 -21.7 -25.0 -15.7 -13.3 2003 -11.1 -19.0 -24.6 -25.7 -27.5 -29.8 -30.6 -33.4 -31.8 -24.5 -20.7 -13.4 2004 -14.0 -21.2 -29.3 -26.0 -31.2 -28.0 -39.1 -37.4 -34.7 -27.8 -17.9 -12.5 2005 -9.6 -20.6 -25.9 -30.2 -27.2 -28.4 -28.4 -34.2 -24.0 -24.2 -17.0 -11.1 2006 -11.5 -15.5 -25.8 -31.3 -34.5 -26.0 -32.2 -25.4 -29.2 -25.6 -17.0 -14.2 2007 -9.8 -18.3 -23.5 -23.3 -24.2 - - - - -30.6 -18.7 -12.5 2008 -11.2 -21.3 -20.9 -25.6 -27.7 -27.5 -31.4 -39.3 -25.0 -23.5 -20.6 -14.3 2009 -12.7 -21.7 -24.6 -26.2 -29.2 -30.5 -27.1 -31.6 -32.6 -28.3 -15.6 -11.9 2010 -13.8 -17.4 -23.2 -25.7 -30.0 -30.8 -34.7 -29.0 -31.5 -26.6 -19.4 -12.5 2011 -13.1 -20.4 -24.0 -28.1 -26.3 -28.6 -21.2 -25.7 -34.0 -22.7 -16.1 -11.2 2012 -13.2 -16.8 -22.0 -25.7 -23.4 -32.6 -31.8 -31.8 -29.7 -24.2 -18.8 -9.3 2013 -9.5 -18.4 -20.0 -31.8 -28.9 -34.0 -32.4 -29.5 -30.2 -25.6 -19.7 -11.4 2014 -12.0 -19.4 -25.6 -28.9 -22.5 -29.6 -35.6 -26.2 -22.1 - - - 2015 - - - - - - - - - - - - 2016 - -19.3 -26.2 -29.2 -26.0 -32.2 -32.1 -30.4 -31.9 -23.0 -17.9 -11.2 2017 -14.1 -16.8 -22.3 -20.4 -23.0 -27.9 -32.1 -29.6 -35.1 -23.9 -19.3 -13.0 2018 -12.9 -18.7 -20.8 -24.7 -29.8 -31.0 -29.5 -32.0 -31.5 -21.1 -17.1 -11.7 2019 -11.9 -16.1 -24.1 -26.9 -26.3 -25.9 -29.8 -28.4 -26.5 -25.6 -18.2 -12.0 2020 -13.4 -13.7 -26.3 -26.3 -22.8 -29.7 -29.9 -29.6 -30.0 -25.6 -21.0 -13.3 2021 -13.4 -19.3 -25.5 -33.0 -28.3 -24.6 -25.7 -36.2 -30.6 -26.0 -17.6 -13.3 2022 -12.6 -15.9 -22.2 -24.5 -24.3 -29.2 -25.8 -28.4 -28.4 -28.0 -21.1 -11.5 2023 -13.1 -16.8 -24.6 -27.3 -28.9 -28.9 -30.5 -39.3 -22.8 -28.1 -19.5 -12.3 2024 -13.4 -21.0 -21.6 -26.9 -25.3 -24.4 -31.6 -27.9 -32.1 -24.6 -21.3 -