Casey 00Z 150hPa temperature 1957 - - - -53.2 -55.1 -57.6 -68.2 -69.5 -69.0 -57.3 -39.3 -43.0 1958 -41.8 -43.4 -45.9 -50.5 -58.5 -62.5 -69.3 -70.7 -68.8 -61.8 -52.5 -44.5 1959 -42.1 -42.5 -46.6 -49.8 -55.6 -63.6 -70.5 -73.5 -70.8 -68.3 -57.7 -46.5 1960 -43.2 -43.5 -45.0 -49.9 -54.9 -61.5 -66.6 -70.6 -69.0 -62.7 -46.9 -43.8 1961 -41.4 -44.3 -45.9 -48.9 -59.2 -61.0 -68.8 -71.2 -68.9 -66.1 -50.9 -44.0 1962 -44.3 -44.5 -46.4 -52.5 -57.6 -65.0 -66.6 -70.1 -66.6 -59.8 -46.7 -42.3 1963 -42.2 -42.3 -45.1 -51.0 -55.5 -65.5 -70.4 -74.2 -70.4 -66.2 -51.4 -44.5 1964 -43.7 -44.3 -47.2 -51.3 -59.6 -64.7 -69.3 -68.3 -63.0 -53.7 -45.2 -43.6 1965 -42.9 -43.9 -46.8 -49.8 -58.8 -65.2 -69.2 -72.2 -71.6 -64.6 -56.3 -45.0 1966 -44.1 -44.5 -45.8 -50.0 -57.5 -60.4 -65.7 -70.2 -69.7 -63.0 -48.2 -44.5 1967 -44.6 -43.9 -47.3 -51.9 - -62.7 -67.3 -71.9 -66.8 -59.1 -48.9 -43.6 1968 -43.4 -43.9 -47.1 -51.1 -55.9 -63.1 -70.4 -72.6 -69.9 -60.4 -43.6 -42.8 1969 -42.8 -42.7 - -51.6 -54.4 -63.3 -68.6 -69.4 -69.1 -67.1 -52.8 -46.3 1970 -44.9 -44.6 -46.2 -51.0 -56.3 -63.0 -67.9 -70.6 -69.2 -61.6 -48.1 -44.6 1971 -43.7 -44.0 -45.5 -50.7 -52.1 -62.5 -68.7 -70.3 -71.7 -58.6 -50.2 -45.4 1972 -42.7 -43.4 -47.1 -52.5 -58.7 -67.0 -67.4 -72.4 -70.2 -58.9 -50.5 -45.2 1973 -43.9 -42.9 -45.8 -50.8 -56.7 -63.8 -68.0 -70.4 -67.0 -61.3 -50.8 -46.3 1974 -42.6 -44.3 -46.7 -51.0 -58.7 -66.1 -69.5 -75.7 -67.4 -59.0 -43.7 -44.0 1975 -42.8 -43.7 -46.5 -51.3 -59.4 -65.5 -69.7 -64.7 -63.4 -64.8 -54.2 -44.1 1976 -43.8 -44.2 -46.1 -51.5 -58.7 -65.6 -70.7 -72.2 -69.6 -62.8 -46.7 -46.3 1977 -43.2 -45.2 -48.1 -52.5 -57.0 -60.4 -67.9 -71.0 -67.1 -57.0 -48.8 -43.7 1978 -42.5 -42.4 -46.7 -52.2 -58.2 -63.8 -69.5 -71.5 -67.8 -63.0 -48.4 -44.1 1979 -43.8 -43.8 -47.2 -51.2 -58.2 -64.7 -70.6 -74.1 -69.1 -57.8 -51.0 -44.5 1980 -43.2 -43.0 -47.1 -50.6 -55.4 -58.9 -67.2 -73.9 -72.6 -62.3 -51.1 -44.8 1981 -43.2 -43.9 -46.0 -51.9 -58.2 -62.8 -68.4 -74.7 -71.2 -63.7 -52.4 -44.6 1982 -44.1 -44.0 -46.2 -52.0 -61.0 -64.7 -73.3 -73.8 -68.7 -65.6 -52.5 -42.8 1983 -43.3 -43.9 -47.3 -53.2 -60.3 -65.4 -70.0 -74.6 -73.3 -63.5 -54.2 -46.4 1984 -44.0 -44.3 -46.9 -54.6 -57.3 -61.7 -70.0 -72.9 -68.5 -61.8 -51.6 -47.5 1985 -43.7 -44.9 -47.0 -51.3 -56.8 -66.0 -68.5 -71.7 -72.4 -65.6 -57.2 -50.4 1986 -44.3 -46.1 -47.5 -52.7 -57.4 -62.9 -69.3 -73.7 -68.6 -64.8 -53.9 -45.6 1987 -44.9 -45.1 -46.6 -51.7 -58.6 -61.7 -71.5 -73.5 -72.5 -68.1 -59.9 -48.6 1988 -45.6 -44.2 -47.8 -52.6 -59.5 -64.4 -68.4 -68.5 -60.8 -54.4 -48.8 -43.3 1989 -43.4 -43.6 -46.8 -50.4 -57.1 -64.4 -69.7 -73.7 -71.6 -66.0 -58.1 -45.6 1990 -44.1 -44.2 -47.6 -53.0 -55.7 -62.4 -67.8 -71.7 -69.4 -64.5 -58.4 -47.1 1991 -44.2 -46.9 -47.4 -50.0 -57.0 -64.6 -72.1 -71.7 -67.7 -59.3 -51.6 -43.9 1992 -43.7 -44.8 -48.1 -51.8 -55.9 -59.8 -67.1 -70.1 -66.9 -64.3 -56.3 -47.7 1993 -45.8 -43.5 -47.3 -52.1 -58.4 -66.7 -68.7 -72.4 -70.8 -65.0 -53.7 -50.1 1994 -46.3 -45.3 -48.4 -51.7 -57.8 -59.9 -68.5 -70.4 -72.1 -62.0 -45.8 -49.8 1995 -43.8 -44.4 -47.2 -50.0 -57.6 -63.8 -70.3 -72.6 -68.0 -67.0 -51.2 -53.5 1996 -47.1 -46.1 -46.9 -51.9 -60.1 -63.6 -69.8 -72.9 -62.8 -67.5 -57.9 -46.1 1997 -44.3 -44.8 -46.9 -51.7 -57.6 -64.3 -69.7 -69.4 -67.6 -64.6 -54.6 -49.9 1998 -45.0 -46.2 -48.1 -52.4 -58.2 -61.2 -69.9 -73.5 -69.5 -66.1 -61.2 -53.9 1999 -47.8 -46.9 -48.4 -51.5 -57.9 -64.4 -69.6 -73.3 -69.9 -64.1 -59.8 -55.5 2000 -48.3 -46.1 -48.8 -54.6 -59.6 -65.6 -69.8 -72.9 -69.2 -58.4 -56.9 -46.0 2001 -44.7 -46.8 -47.1 -52.2 -56.3 -60.9 -70.4 -73.4 -72.3 -66.7 -66.2 -53.0 2002 -43.7 -44.9 -48.2 -52.0 -57.0 -62.7 -69.5 -66.1 -54.6 -52.6 -50.0 -44.9 2003 -45.3 -46.9 -46.2 -52.0 -58.8 -64.1 -69.2 -72.9 -68.7 -65.8 -57.3 -48.0 2004 -45.2 -45.6 -46.2 -50.1 -55.8 -64.3 -69.3 -71.1 -68.9 -61.4 -52.8 -46.1 2005 -45.1 -44.2 -47.8 -51.9 -56.9 -63.3 -70.1 -71.0 -62.9 -58.2 -56.9 -50.1 2006 -45.5 -45.6 -47.0 -51.2 -57.2 -65.9 -70.5 -75.2 -71.6 -70.7 -63.0 -52.8 2007 -47.9 -44.9 -47.8 -51.9 -59.7 -64.4 -73.2 -71.3 -66.8 -63.4 -58.4 -51.4 2008 -46.1 -45.0 -47.5 -52.2 -55.4 -64.9 -70.5 -71.6 -71.5 -64.8 -57.7 -51.2 2009 -47.2 -46.3 -47.0 -52.5 -57.2 -64.9 -71.0 -74.4 -71.4 -65.6 -52.4 -45.6 2010 -46.5 -44.9 -47.5 -51.6 -59.3 -65.9 -70.1 -72.1 -72.3 -67.5 -62.7 -50.7 2011 -47.9 -44.2 -48.8 -51.9 -57.2 -65.9 -71.4 -73.8 -69.9 -64.2 -53.5 -53.5 2012 -46.0 -45.4 -46.5 -51.8 -57.0 -65.0 -69.7 -69.9 -64.9 -56.6 -49.0 -44.6 2013 -44.6 -43.8 -46.6 -51.7 -58.4 -65.4 -70.8 -72.5 -62.6 -58.9 -55.8 -44.4 2014 -45.5 -44.9 -47.1 -51.0 -59.0 -63.2 -69.1 -71.9 -68.3 -62.1 -51.6 -52.4 2015 -45.7 -44.2 -47.0 -51.6 -57.0 -65.1 -70.1 -73.5 -73.5 -70.7 -64.0 -57.5 2016 -47.5 -45.6 -47.2 -53.1 -58.1 -65.1 -71.4 -70.6 -65.7 -63.4 -47.6 -46.6 2017 -45.3 -45.0 -47.9 -53.0 -59.1 -64.5 -70.1 -70.5 -64.2 -58.8 -59.5 -44.6 2018 -44.1 -44.6 -47.6 -51.7 -57.5 -65.0 -71.9 -71.4 -71.6 -66.3 -62.5 -48.5 2019 -45.8 -45.3 -46.6 -51.7 -58.5 -65.1 -67.9 -67.5 -56.9 -50.6 -44.5 -46.9 2020 -44.8 -42.4 -45.7 -51.9 -57.4 -66.2 -69.7 -68.8 -71.7 -70.1 -66.5 -56.1 2021 -45.9 -44.8 -47.8 -50.8 -60.2 -65.9 -72.4 -74.5 -72.3 -68.7 -63.5 -57.5 2022 -46.2 -44.8 -47.5 -52.3 -58.9 -63.6 -71.4 -73.2 -72.0 -69.0 -62.1 -57.1 2023 -45.4 -46.2 -48.5 -51.9 -59.1 -63.5 -70.7 -72.2 -71.6 -64.9 -62.6 -51.4 2024 -49.1 -46.6 -48.2 -52.2 - - - - - - - -