Halley 12Z 150hPa temperature 1957 - - - -54.4 -63.8 - - -75.7 -76.2 -71.5 -52.2 -41.3 1958 -41.3 -43.4 -47.1 -55.7 -64.4 -71.7 -76.7 -79.1 -79.0 -74.0 -60.1 -44.6 1959 -42.7 -43.0 -48.2 -54.6 -62.8 -69.5 -74.2 -79.2 -78.3 -72.9 -67.0 -50.9 1960 -43.4 -44.7 -49.0 -57.5 -62.8 -70.3 -76.4 -80.5 -80.1 -74.6 -63.0 -44.6 1961 -42.6 -44.4 -48.6 -52.2 -62.7 -70.3 -73.5 -78.7 -78.7 -72.5 -64.7 -53.8 1962 -44.7 -46.8 -49.1 -54.6 -64.3 -72.8 -76.0 -79.3 -78.6 -72.3 -60.8 -42.6 1963 -42.7 -43.6 -47.0 -56.2 -65.5 -71.3 -77.9 -81.6 -79.4 -74.8 -60.6 -42.2 1964 -44.0 -44.4 -48.3 -56.3 -64.1 -74.8 -75.9 -80.1 -78.0 -72.3 -52.6 -42.0 1965 -43.2 -45.3 -49.0 -55.8 -65.4 -70.4 -76.4 -79.9 -79.2 -76.5 -64.0 -47.6 1966 -42.5 -43.5 -48.3 -53.8 -60.4 -69.7 -76.8 -79.2 -77.7 -73.4 -62.0 -44.2 1967 -43.3 -43.9 -48.5 -56.6 -65.0 -70.9 -74.9 -78.2 -79.7 -71.1 -57.7 -44.4 1968 -42.4 -43.7 -48.2 -55.5 -66.1 -71.8 -76.7 -80.0 -80.0 -73.6 -54.9 -42.6 1969 -42.4 -43.6 -47.8 -56.5 -63.3 -70.1 -74.7 -79.0 -78.6 -75.2 -64.7 -48.7 1970 -43.8 -44.7 -48.9 -56.6 -64.0 -69.1 -77.0 -79.9 -78.9 -74.0 -58.6 -48.3 1971 -41.8 -43.8 -47.4 -53.8 -63.2 -66.3 -75.8 -79.0 -77.2 -72.6 -57.4 -47.1 1972 -43.0 -44.1 -47.2 -54.6 -63.6 -68.9 -76.2 -77.0 -76.7 -71.6 -55.9 -42.7 1973 -42.4 -43.8 -48.0 -55.9 -65.3 -70.4 -73.1 -78.7 -78.2 -72.8 -57.4 -42.7 1974 -43.2 -43.6 -48.3 -54.9 -62.1 -68.5 -75.3 -80.0 -76.6 -73.0 -58.9 -41.8 1975 -43.4 -44.5 -47.7 -54.0 -63.9 -69.7 - - - - - -45.7 1976 -42.9 -44.1 -49.0 -52.7 -63.8 -70.6 -75.2 -77.9 -77.5 -71.2 -60.1 -44.4 1977 -42.5 -43.9 -49.4 -57.4 - -70.8 -73.8 -78.0 -78.0 -74.3 -57.9 -44.5 1978 -41.8 -42.6 -48.0 -52.4 -62.1 -69.2 -74.5 -78.5 -75.4 -69.9 -56.1 -44.0 1979 -42.8 -43.6 -47.5 -55.8 -62.2 -71.4 -75.5 -79.7 -79.2 -70.9 -58.6 -43.6 1980 -42.0 -42.8 -47.6 -53.3 -60.4 -68.6 -73.9 -75.4 -76.5 -73.4 -61.4 -42.6 1981 - -44.0 -48.9 -56.5 -63.4 -69.8 -76.4 - - - - - 1982 - - -48.6 -56.5 -62.7 -71.1 -75.5 -76.5 -77.9 -72.7 -63.6 -50.8 1983 -43.4 -45.3 -48.1 -54.8 -64.8 -71.9 -76.0 -77.7 -77.2 -74.5 -60.5 -45.5 1984 - -45.8 -48.0 -55.4 - -68.9 -74.8 -78.7 -77.3 -73.9 -63.9 -47.4 1985 -44.2 -44.6 -47.7 -52.3 -62.0 -68.0 -74.4 -78.2 -75.6 -73.4 -65.9 -45.9 1986 -45.6 -46.5 -48.4 -54.4 -62.0 -69.7 -75.1 -76.2 -77.4 -71.8 -63.3 -50.5 1987 -45.2 -47.1 -48.3 -55.2 -60.3 -70.9 -75.6 -76.7 -78.9 -76.1 -69.8 -52.1 1988 -43.5 -43.8 -49.2 -54.5 -61.5 -70.1 -74.9 -78.7 -77.3 -73.1 -62.5 -43.5 1989 -44.2 -44.8 -48.1 -54.7 -62.0 -69.4 -75.1 -78.1 -78.1 -75.8 -64.7 -52.1 1990 -45.3 -43.4 -47.7 -55.1 -63.5 -72.0 -75.1 -78.1 -78.2 -74.8 -68.2 -57.3 1991 -44.8 -46.1 -48.9 -55.2 -63.4 -69.7 -73.7 -77.6 -78.4 -73.2 -61.7 -46.5 1992 - -45.8 -49.1 -55.0 -64.0 -70.6 -74.2 -78.0 -79.1 -74.0 -63.8 -51.8 1993 -45.8 -44.9 -49.0 -56.8 -64.0 -71.1 -77.0 -78.8 -78.3 -77.0 -71.8 -53.2 1994 -46.3 -45.2 -49.4 -53.9 -64.3 -70.8 -75.7 -77.8 -79.8 -74.7 -67.2 -41.7 1995 -43.7 -44.1 -49.2 -55.6 -63.3 -70.5 -76.7 -76.5 -78.0 -76.1 -71.6 -53.8 1996 -44.9 -46.2 -50.0 -56.4 -65.0 -72.5 -75.7 -78.6 -76.5 -74.1 -70.1 -59.0 1997 -43.6 -44.7 -47.8 -55.6 -62.4 -68.5 -74.9 -78.6 -77.6 -74.5 -66.5 -48.1 1998 -45.6 -45.4 -48.5 -54.4 -63.0 -70.4 -76.9 -79.5 -79.1 -74.7 -69.2 -56.0 1999 -46.0 -47.0 -48.5 -54.0 -61.1 -71.2 -75.1 -78.6 -76.3 -75.1 -70.3 -57.6 2000 -47.1 -46.3 -49.4 -55.1 -63.6 -71.0 -76.3 -78.5 -77.2 -75.4 -61.5 -46.6 2001 -45.6 -46.4 -48.3 -54.4 -65.1 -70.2 -74.6 -78.4 -79.1 -75.4 -69.2 -58.4 2002 -47.3 -45.2 -49.8 -53.5 -62.5 -68.9 -73.6 -78.7 -71.5 -68.0 -52.3 -45.2 2003 -46.6 -45.5 -47.5 -54.1 -63.7 -70.7 -76.0 -79.6 -79.3 -74.6 -63.6 -51.0 2004 -44.8 -45.2 -49.0 -53.7 -63.5 -69.9 -75.1 -79.2 -79.8 -72.8 -65.3 -53.9 2005 -43.8 -45.5 -49.1 -55.5 -63.7 -71.8 -75.2 -80.0 -78.2 -74.7 -62.3 -49.2 2006 -43.5 -45.4 -49.3 -54.7 -62.0 -69.1 -74.6 -76.7 -79.1 -75.8 -71.4 -55.6 2007 -46.9 -45.4 -48.5 -54.8 -62.7 -70.5 -75.4 -77.8 -80.2 -74.5 -65.8 -53.7 2008 -45.2 -45.6 -47.4 -55.2 -62.9 -68.4 -74.8 -78.7 -79.5 -74.8 -68.9 -59.2 2009 -47.6 -46.1 -48.1 -55.3 -63.0 -69.5 -72.8 -78.6 -79.2 -73.3 -68.3 -53.4 2010 -46.7 -46.0 -49.2 -55.5 -65.5 -73.0 -78.0 -79.9 -79.0 -74.7 -68.8 -60.7 2011 -47.9 -45.9 -48.7 -56.1 -62.4 -69.5 -74.3 -77.2 -78.2 -74.8 -70.1 -55.4 2012 -47.2 -46.2 -49.0 -53.4 -62.9 -71.1 -76.0 -80.1 -79.1 -73.4 -58.7 -45.7 2013 -44.5 -44.6 -47.3 -54.8 -62.8 -71.2 -75.7 -79.4 -78.9 -71.1 -56.8 -46.3 2014 -45.2 -46.5 -48.9 -55.5 -63.3 -69.6 -75.8 - - -74.7 -67.7 -49.4 2015 -44.6 -45.2 -48.5 -55.1 -63.6 -70.8 -77.8 -78.9 -79.7 -76.1 -71.0 -59.2 2016 -46.3 -46.2 -48.6 -56.0 -63.3 -69.1 -75.1 -78.2 -76.9 -73.3 -62.2 -43.8 2017 -44.3 -44.3 - - - - - - - - - -49.8 2018 -44.3 -44.5 - - - - - - - - - -49.6 2019 -45.7 -44.0 - - - - - - - - - -46.9 2020 -44.9 - - - - - - - - - - - 2021 - - - - - - - - - - - -58.1 2022 -49.1 - - - - - - - - - - -57.0 2023 -48.1 - - - - - - - - - - -55.5 2024 -47.7 - - - - - - - - - - -