Hi_Priestley_Gl 12Z temperature 1989 - -29.4 -38.3 -38.2 - - - - - -40.6 -31.0 -21.4 1990 -23.1 - - - - - -35.4 - - -38.4 -28.0 -19.1 1991 -21.8 -27.0 -39.3 -39.2 - -39.5 - - -41.5 -36.7 -31.3 -19.5 1992 -21.9 -28.5 -36.7 -42.7 -40.5 -40.8 - -38.8 - -40.4 - - 1993 -20.0 -30.5 - - - - - - - - -30.5 -23.6 1994 -22.9 -32.6 -42.0 -40.5 - - - - - -39.7 - - 1995 - - - - - - - - - - - - 1996 -23.1 -29.9 -35.7 -40.8 - - - - - -43.2 -28.7 -21.7 1997 -23.3 -30.9 -38.9 - - - - - - - - -22.8 1998 -23.5 -29.2 -41.6 - - - - - - -41.2 -32.8 -23.4 1999 -22.7 -30.7 -39.6 -43.3 -47.1 -42.5 -43.4 -47.2 -45.9 -40.5 -30.3 -23.6 2000 -24.7 -31.2 -38.5 -46.2 -42.1 -45.8 -45.5 -46.8 -40.5 -39.8 -28.8 -23.4 2001 -23.6 -31.0 -40.7 -44.7 - - - - - - -31.6 -22.5 2002 -19.9 -32.6 -37.1 -46.3 -43.6 -41.7 -47.8 -51.1 -43.3 -39.2 -31.9 -23.3 2003 -21.6 -30.9 -40.3 -45.2 -44.4 -46.3 -46.6 -45.6 -42.3 -43.0 -30.9 -21.4 2004 - - - - - - - - - - - -22.5 2005 -22.0 -30.7 -40.4 -45.7 -47.0 -42.9 -45.6 -45.1 -45.5 -36.5 -30.5 -19.5 2006 -23.3 -31.1 -41.7 -43.9 - - - - - -40.1 -30.3 -25.3 2007 -19.8 -31.2 -37.8 -42.7 -42.8 -45.9 -45.8 -49.2 -46.6 -39.9 -31.3 -23.5 2008 -22.0 -33.2 -38.8 -43.0 - - - - -46.7 -40.1 -31.4 -22.5 2009 -21.8 -31.2 -39.9 -44.9 -43.6 -44.6 -41.8 -42.5 -46.6 -43.1 -29.3 -22.7 2010 -20.1 -28.7 -35.6 -45.1 -46.5 -49.9 -51.2 -45.9 -47.8 -41.1 -32.7 -22.1 2011 -22.3 -28.2 -37.8 -38.8 -43.9 -41.5 -44.2 -42.4 -41.9 -37.9 -30.0 -22.2 2012 -22.5 -29.9 -39.7 -47.1 - - - - - -41.6 -30.4 -20.4 2013 -21.8 -30.1 -39.6 -45.4 -43.4 -44.8 -48.8 - - -40.0 - - 2014 - -30.5 -40.1 -44.1 -41.9 -48.1 -45.6 -45.6 - -38.1 -31.6 -24.6 2015 -22.2 -29.2 -38.2 -45.1 -43.5 -46.0 - - - -38.6 -34.4 -22.0 2016 -20.5 -29.9 -39.1 -45.7 -41.5 -44.6 -45.6 - -45.0 -41.0 -28.0 -21.9 2017 -20.2 -29.4 -38.0 -44.8 -45.4 -45.9 -48.4 - - - - -22.9 2018 -21.8 -30.6 -37.5 -40.3 -47.6 - - -44.8 -44.9 -39.0 -32.1 -21.8 2019 -21.1 -30.1 -36.8 -44.0 -42.8 -47.2 -41.9 -44.3 -48.4 -41.4 -28.9 -19.8 2020 -21.6 -26.9 -35.4 -43.3 -45.8 -47.5 -42.0 - - - -33.4 -22.0 2021 -23.3 -30.5 -37.8 -45.1 -49.1 -46.7 -44.5 -41.6 -43.1 -39.7 - - 2022 -23.4 -29.1 -36.4 -44.2 -43.9 -42.2 -44.9 - - -36.1 -30.6 -23.7 2023 -24.5 -29.9 -36.8 -41.2 -45.2 - - - - - -32.2 -23.3 2024 -22.7 -32.2 -40.2 -45.7 -46.9 - -44.1 -43.8 -43.6 -39.4 -34.3 -20.7 2025 -21.2 -28.7 -40.1 -44.0 -44.4 -41.0 - - - -37.6 -30.0 -21.4 2026 - - - - - - - - - - - -