Casey 12Z 150hPa temperature 1957 - - - -53.3 -54.9 -56.8 -67.8 -69.7 -69.0 -57.7 -39.3 -42.6 1958 -41.4 -44.2 -46.7 -50.0 - - -68.8 -70.9 -68.8 -62.4 -52.7 -45.0 1959 -42.5 -43.1 -47.0 -50.7 -55.9 -63.2 -70.5 -73.9 -71.2 -69.5 -57.8 -46.6 1960 -43.5 -44.2 -46.3 -50.1 -55.2 -61.8 -66.7 -70.7 -69.7 -64.4 -48.0 -44.2 1961 -42.6 -44.2 -45.8 -49.8 -59.7 -62.2 - - - - -53.4 -44.8 1962 -44.4 -44.8 -46.8 -52.9 -58.0 -64.1 -67.4 -71.0 -66.9 -60.5 -46.9 -42.8 1963 - - - - - - - - - - - - 1964 - -45.0 -48.2 - - - - - -62.4 -55.7 -45.6 -43.5 1965 -43.1 -44.4 -46.4 - - - - - - - - - 1966 -44.5 -44.6 -46.9 - - - - - - - - - 1967 - - - - - - - - - - - - 1968 - - - - - - - - - -61.0 -44.5 -43.4 1969 -43.6 -43.7 - - - - - - - -67.4 -52.5 -46.4 1970 -44.9 -44.8 -47.2 - - - - - - -61.3 -48.4 -45.1 1971 -43.8 -44.8 -45.7 - - - - - - -59.2 -49.4 -46.1 1972 -43.8 -43.9 -47.6 - - - - - - - -50.1 -45.2 1973 -43.9 -43.6 -46.0 - - - - - - -61.0 -50.7 -45.9 1974 -42.4 -43.8 -46.5 - - - - - - -59.3 -44.3 -44.8 1975 -42.6 -43.9 -46.6 - - - - - - -65.3 -53.5 -44.4 1976 -43.5 -44.3 -46.9 - - - - - - -63.7 -47.2 -46.8 1977 -43.4 -45.7 -48.5 - - - - - - -57.1 -46.0 - 1978 - - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - -64.4 -69.6 -67.9 -61.5 -54.3 -47.8 -43.5 1989 -43.3 -44.1 -47.3 -50.7 -57.0 -64.1 -69.6 -73.4 -72.2 -65.6 -57.9 -45.6 1990 -44.1 -44.1 -47.7 -53.5 -56.1 -62.7 -67.2 -71.6 -69.6 -64.9 -58.1 -47.0 1991 -44.1 -47.2 -47.5 -50.0 -57.1 -64.4 -72.4 -71.3 -67.7 -61.1 -52.8 -43.5 1992 -43.8 -45.0 -48.3 -51.8 -55.7 -59.7 -66.9 -69.5 -67.3 -64.5 -56.2 -47.7 1993 -45.9 -43.8 -47.5 -52.0 -58.3 -67.3 -68.8 -72.3 -70.9 -64.8 -53.4 -49.8 1994 -46.1 -45.4 -48.3 -52.0 -58.1 -60.0 -67.8 -70.3 -72.0 -61.8 -45.2 -48.9 1995 -43.8 -44.3 -47.6 -50.1 -57.6 -63.9 -70.0 -72.7 -68.1 -66.7 -51.4 -53.6 1996 -47.1 -46.1 -47.0 -51.9 -60.4 -62.6 -69.8 -72.4 -63.4 -67.6 -58.2 -45.8 1997 -44.2 -44.7 -46.9 -51.6 -57.4 -65.0 -70.0 -69.1 -67.2 -64.3 -54.6 -49.5 1998 -44.9 -46.0 -48.1 -53.0 -58.8 -60.9 -70.0 -73.3 -69.3 -66.0 -61.1 -54.0 1999 -47.5 -45.6 -48.8 -51.1 -58.3 -64.2 -69.9 -73.2 -69.8 -64.4 -60.1 -55.3 2000 -47.6 -45.7 -48.9 -54.3 -59.6 -65.2 -69.5 -73.5 -68.6 -58.7 -57.1 -45.9 2001 -44.5 -46.6 -47.2 -52.7 -56.2 -61.2 -70.8 -73.2 -72.0 -66.8 -65.6 -53.0 2002 -43.6 -44.9 -48.0 -52.4 -57.2 -62.7 -69.4 -66.7 -55.6 -53.2 -49.7 -45.1 2003 -45.0 -47.2 -46.6 -52.2 -59.1 -64.2 -69.1 -72.9 -68.3 -66.3 -57.0 -47.9 2004 -45.3 -45.4 -46.5 -50.5 -55.8 -64.3 - - - - - - 2005 - - - - - - - - - - - -48.1 2006 -45.3 -45.4 -46.8 -51.3 -57.4 -66.2 -70.4 -74.6 -71.8 -70.8 -62.7 -52.6 2007 -47.5 -44.9 -47.7 -52.3 -59.6 -64.7 -72.9 -71.7 -66.3 -63.6 -57.4 -51.2 2008 -46.0 -45.1 -47.3 -52.2 -55.2 -65.0 -70.6 -71.6 -71.2 -63.7 -58.4 -51.1 2009 -47.4 -46.3 -47.4 -52.1 -57.6 -65.1 -71.4 -74.4 -70.9 -65.3 -51.8 -45.5 2010 -46.5 -45.0 -47.4 -51.7 -59.5 -66.3 -70.1 -72.0 -72.0 -67.5 -62.6 -50.7 2011 -48.0 -44.3 -49.1 -50.2 - - - - - - -53.3 -53.5 2012 -45.6 -45.3 -46.2 -51.8 -57.0 -64.6 -69.9 -69.9 -65.1 -57.3 -48.9 -44.7 2013 -44.2 -44.0 -46.5 -52.6 -57.8 -65.7 -70.5 -72.9 -62.4 -58.3 -55.7 -44.3 2014 -45.2 -44.6 -47.0 -51.2 -58.9 -63.3 -68.3 -71.8 -68.3 -62.6 -53.6 -52.2 2015 -45.7 -44.2 -47.1 -51.8 -56.9 -65.3 -70.3 -73.2 -73.6 -70.6 -64.3 -56.9 2016 -47.1 -45.4 -47.5 -53.1 -58.4 -64.7 -70.8 -70.5 -65.3 -63.4 -47.3 -46.7 2017 -45.1 -44.7 -48.0 - - -65.3 -69.8 -71.0 -63.5 -59.3 -59.1 -44.6 2018 -44.0 -44.9 -47.9 -51.6 -57.6 -65.6 -71.9 -71.4 -71.0 -66.3 -61.9 -48.1 2019 -46.3 -45.8 -46.7 -51.6 -57.8 -65.2 -67.8 -67.3 -56.7 -50.1 -44.9 -46.7 2020 -44.9 -42.4 -45.7 -51.6 -57.1 -66.9 -70.4 -68.2 -71.8 -70.0 -66.5 -55.8 2021 -45.9 -44.4 -48.0 -50.7 -60.7 -65.3 -73.1 -74.8 -72.4 -68.5 -63.5 -57.4 2022 -45.7 -44.8 -47.6 -52.3 -59.5 -63.6 -71.5 -72.9 -72.1 -69.2 -62.1 -57.1 2023 -45.2 -46.0 -48.7 -52.0 -59.0 -63.9 -70.7 -72.1 -71.3 -64.7 -62.9 -51.4 2024 -48.5 -46.4 -48.1 -52.3 - - - - - - - -