Halley 12Z 200hPa temperature 1957 - - - -54.5 -63.9 -67.7 -72.8 -73.3 -75.0 -71.0 -54.9 -43.8 1958 -42.3 -43.5 -46.7 -55.2 -63.0 -70.1 -75.0 -76.1 -75.9 -72.0 -62.6 -49.1 1959 -45.8 -44.6 -47.6 -54.2 -63.4 -68.8 -72.2 -75.9 -75.3 -71.3 -67.8 -55.5 1960 -46.4 -45.8 -49.2 -57.0 -62.1 -69.4 -74.5 -76.1 -76.2 -72.9 -65.5 -48.4 1961 -44.6 -45.8 -49.9 -51.3 -63.1 -68.7 -71.4 -75.3 -74.7 -71.3 -66.7 -57.0 1962 -46.4 -48.1 -50.1 -54.2 -63.7 -71.4 -73.2 -74.2 -74.5 -71.8 -64.6 -46.8 1963 -44.5 -44.3 -46.6 -55.6 -65.5 -69.3 -74.9 -77.8 -76.4 -73.4 -62.9 -47.1 1964 -47.1 -46.1 -48.8 -55.4 -61.6 -73.9 -72.8 -76.3 -75.2 -71.2 -55.4 -44.6 1965 -44.3 -46.0 -49.5 -55.5 -64.8 -68.7 -73.0 -75.6 -76.3 -74.2 -65.6 -52.0 1966 -44.9 -44.6 -48.5 -52.7 -60.3 -68.3 -73.9 -76.7 -74.9 -72.3 -64.1 -49.5 1967 -46.0 -44.4 -48.7 -56.5 -64.4 -69.6 -71.3 -75.4 -76.1 -71.6 -61.2 -47.1 1968 -44.6 -44.8 -48.4 -55.3 -66.6 -70.3 -74.5 -77.0 -75.8 -72.6 -58.6 -45.7 1969 -44.9 -44.8 -48.2 -55.8 -62.1 -68.8 -72.5 -75.7 -74.7 -72.9 -65.4 -53.1 1970 -45.9 -46.0 -49.1 -56.6 -64.0 -67.6 -73.5 -75.9 -75.3 -72.0 -62.9 -52.6 1971 -43.1 -44.9 -47.2 -53.2 -60.5 -64.6 -73.8 -77.0 -73.9 -71.5 -60.9 -50.1 1972 -44.9 -44.5 -47.3 -54.2 -62.7 -66.7 -74.2 -73.8 -73.6 -70.7 -59.3 -47.1 1973 -44.6 -45.4 -48.3 -55.2 -65.5 -68.9 -69.9 -75.3 -75.2 -71.0 -58.7 -46.9 1974 -45.0 -44.7 -48.6 -54.2 -60.0 -65.8 -73.0 -75.9 -73.4 -71.3 -59.7 -45.2 1975 -45.6 -44.2 -48.0 -52.7 -62.4 -67.8 -71.5 - - - - -49.1 1976 -45.1 -44.4 -49.0 -52.6 -63.3 -69.4 -73.6 -74.6 -74.0 -69.6 -62.2 -46.9 1977 -43.0 -44.7 -50.0 -57.7 - -68.4 -71.4 -74.3 -75.6 -72.2 -61.7 -49.5 1978 -44.2 -43.3 -48.5 -53.2 -60.6 -68.3 -71.9 -76.2 -72.4 -69.4 -59.4 -46.7 1979 -43.5 -43.9 -47.0 -55.9 -60.4 -70.4 -72.8 -76.8 -75.6 -70.2 -61.2 -46.9 1980 -43.7 -43.5 -48.0 -52.5 -58.8 -67.6 -70.9 -72.3 -74.0 -71.4 -62.6 -45.4 1981 - -45.8 -48.6 -56.2 -62.8 -67.3 -73.6 - - - - - 1982 - - -49.5 -56.2 -61.3 -69.5 -72.7 -72.9 -75.0 -71.3 -64.5 -54.0 1983 -45.4 -46.8 -47.9 -54.4 -64.1 -71.5 -73.1 -74.6 -73.6 -72.2 -62.5 -48.8 1984 - -47.1 -47.3 -54.9 -60.8 -66.2 -72.6 -75.3 -74.5 -71.1 -63.7 -49.4 1985 -45.4 -45.6 -47.6 -51.3 -60.1 -65.9 -72.4 -74.4 -72.9 -71.5 -65.0 -48.7 1986 -47.1 -47.9 -49.0 -53.3 -60.5 -68.3 -72.5 -73.5 -74.1 -70.0 -63.5 -52.9 1987 -47.3 -48.3 -48.9 -55.1 -59.2 -69.6 -72.7 -73.0 -75.4 -73.1 -69.0 -54.6 1988 -44.9 -44.2 -49.3 -53.7 -61.6 -69.1 -72.4 -76.0 -74.6 -70.5 -63.4 -45.1 1989 -45.6 -45.2 -48.1 -52.9 -60.5 -68.2 -72.7 -74.9 -74.9 -73.4 -64.6 -53.4 1990 -47.2 -44.0 -47.6 -54.3 -63.0 -71.8 -71.6 -75.0 -74.6 -71.1 -67.4 -57.3 1991 -45.9 -46.9 -49.4 -55.0 -62.3 -69.1 -71.6 -73.9 -74.1 -70.7 -62.7 -48.6 1992 - -47.1 -48.6 -54.8 -62.4 -67.9 -71.5 -75.1 -75.0 -72.2 -63.6 -53.5 1993 -47.7 -45.6 -49.5 -56.1 -62.7 -68.8 -74.2 -75.5 -74.5 -73.1 -69.2 -56.0 1994 -48.2 -45.9 -49.1 -53.1 -63.3 -69.5 -72.8 -74.0 -76.1 -71.3 -65.7 -44.1 1995 -44.8 -44.5 -49.7 -55.0 -61.8 -69.4 -73.6 -73.0 -75.1 -72.8 -69.5 -55.5 1996 -46.5 -47.0 -50.0 -55.4 -64.2 -70.9 -72.3 -75.2 -72.8 -71.9 -68.3 -58.4 1997 -45.0 -45.7 -47.0 -55.7 -61.3 -66.8 -72.1 -75.4 -74.9 -71.3 -65.2 -49.9 1998 -46.9 -46.5 -48.8 -54.6 -61.9 -68.8 -75.1 -76.3 -75.4 -72.0 -68.1 -57.2 1999 -48.4 -48.7 -48.2 -53.1 -61.2 -70.1 -72.0 -74.5 -72.6 -71.4 -68.4 -58.6 2000 -49.6 -46.5 -49.2 -55.1 -62.3 -69.0 -72.8 -74.6 -73.7 -72.5 -61.4 -49.3 2001 -46.9 -47.0 -48.1 -54.1 -65.4 -68.9 -72.5 -74.8 -75.3 -72.1 -67.3 -59.9 2002 -48.8 -46.3 -50.7 -53.3 -61.3 -67.5 -70.9 -75.6 -68.7 -67.0 -53.5 -47.2 2003 -47.9 -46.8 -47.6 -53.5 -63.1 -69.5 -72.8 -75.9 -75.4 -72.0 -63.8 -52.9 2004 -46.2 -46.2 -49.5 -53.7 -62.4 -68.7 -73.8 -76.5 -76.4 -70.1 -64.6 -55.7 2005 -45.3 -46.7 -49.3 -54.8 -62.3 -70.5 -72.2 -76.1 -75.2 -71.7 -63.0 -51.4 2006 -44.3 -45.7 -50.8 -54.7 -60.6 -68.1 -72.6 -72.9 -75.6 -72.4 -69.1 -57.2 2007 -48.6 -46.5 -49.4 -53.9 -61.5 -69.1 -73.2 -74.7 -76.4 -71.9 -64.2 -54.7 2008 -47.1 -46.0 -47.5 -54.5 -61.2 -67.3 -72.1 -74.6 -75.5 -71.5 -67.0 -59.7 2009 -49.3 -47.1 -47.7 -53.7 -61.2 -68.8 -70.4 -74.7 -76.1 -70.5 -68.3 -54.9 2010 -49.1 -46.4 -49.5 -55.0 -65.8 -71.7 -74.6 -75.9 -76.0 -71.7 -67.2 -61.4 2011 -50.4 -46.8 -48.5 -55.8 -61.2 -67.4 -71.1 -73.4 -75.0 -71.3 -68.0 -55.5 2012 -49.4 -47.7 -49.0 -52.7 -61.5 -69.7 -74.2 -77.0 -75.6 -71.7 -59.8 -47.5 2013 -45.7 -44.9 -47.1 -53.8 -60.8 -69.3 -73.7 -76.1 -74.3 -68.9 -57.9 -48.8 2014 -46.4 -48.9 -49.1 -55.6 -62.6 -68.1 -72.5 - - -72.2 -67.2 -52.0 2015 -46.5 -46.6 -48.9 -54.7 -62.4 -69.1 -75.4 -75.1 -76.9 -72.2 -68.4 -60.8 2016 -48.8 -48.2 -48.5 -56.1 -62.0 -68.8 -72.7 -74.1 -73.5 -70.5 -62.2 -46.0 2017 -46.1 -45.9 - - - - - - - - - -51.1 2018 -45.8 -44.9 - - - - - - - - - -51.6 2019 -47.8 -45.1 - - - - - - - - - -49.5 2020 -47.0 - - - - - - - - - - - 2021 - - - - - - - - - - - -59.1 2022 -53.0 - - - - - - - - - - -58.2 2023 -50.5 - - - - - - - - - - -55.7 2024 -49.5 - - - - - - - - - - -