Syowa 12Z 200hPa temperature 1959 - - - -53.0 - - -71.7 - - -69.9 - - 1960 - - -46.4 -52.5 -61.8 -68.6 -70.5 -72.4 -73.4 -68.4 -60.8 -48.6 1961 -43.3 -44.8 -46.0 -50.1 -56.5 -66.3 -70.2 -71.9 -72.8 -66.5 -58.2 -52.1 1962 - - - - - - - - - - - - 1963 - - - - - - - - - - - - 1964 - - - - - - - - - - - - 1965 - - - - - - - - - - - - 1966 - -43.3 -44.0 -50.7 -56.2 -64.0 -71.5 -73.4 -72.5 -67.5 -58.4 -46.2 1967 -44.1 -46.1 -47.8 -52.0 -60.6 -66.0 -71.2 -72.6 -71.3 -66.1 -55.9 -43.6 1968 -43.0 -45.2 - - - - - - - - - - 1969 - - - - - - - - - - - - 1970 - - - - - - - - - - - - 1971 - - - - - - - - - - - - 1972 - - - - - - - - - - - - 1973 - - - - - - - - - - - - 1974 - - -47.4 -52.2 -59.0 -65.8 -69.7 -72.0 -69.7 -66.1 -59.0 -46.8 1975 -43.1 -42.2 -44.9 -51.8 -61.7 -67.8 -71.1 -70.0 -70.2 -65.8 -59.7 -48.8 1976 -45.3 -43.3 -47.3 -50.1 -58.6 -67.7 -70.8 -73.7 -70.3 -69.5 -58.9 -47.6 1977 -43.4 -44.2 -47.6 -53.8 -59.8 -64.6 -74.5 -72.4 -69.9 -64.3 -60.9 -46.3 1978 -42.8 -44.0 -45.8 -49.4 -59.5 -65.0 -70.9 -71.8 -70.5 -66.3 -59.2 -45.3 1979 -42.8 -43.1 -46.4 -52.5 -61.7 -66.3 -70.7 -72.2 -72.2 -64.3 -55.2 -46.0 1980 -42.1 -43.2 -48.8 -50.6 -58.2 -61.8 -70.8 -68.6 -71.1 -68.1 -61.3 -48.3 1981 -45.2 -45.2 -47.9 -54.7 -60.5 -65.5 -71.1 -71.0 -70.5 -66.2 -60.8 -47.6 1982 -46.6 -45.1 -47.8 -52.3 -62.8 -66.9 -70.6 -73.2 -72.2 -69.4 -57.6 -50.5 1983 -46.0 -45.3 -48.6 -54.7 -60.7 -67.7 -71.6 -72.6 -70.9 -69.2 -61.8 -48.0 1984 -45.9 -46.4 -48.4 -52.8 -61.0 -66.2 -70.9 -73.0 -71.8 -68.4 -61.9 -50.2 1985 -45.2 -46.4 -48.1 -51.6 -58.3 -69.7 -70.1 -71.3 -72.8 -70.6 -64.7 -53.5 1986 -46.5 -46.5 -49.2 -53.2 -60.6 -66.2 -68.1 -71.8 -72.9 -67.5 -64.3 -51.5 1987 -45.7 -48.2 -49.4 -53.5 -62.7 -68.2 -69.6 -75.4 -73.0 -69.0 -65.5 -56.2 1988 -45.6 -47.1 -52.1 -53.2 -61.2 -67.0 -71.0 -71.7 -70.0 -68.2 -54.8 -44.4 1989 -46.0 -44.3 -47.1 -53.7 -57.5 -66.6 -71.2 -73.8 -70.8 -69.5 -63.0 -49.5 1990 -45.5 -43.9 -47.3 -53.1 -60.7 -69.4 -70.7 -71.3 -72.0 -67.8 -59.4 -54.3 1991 -46.8 -49.3 -47.9 -52.8 -60.5 -65.3 -70.5 -72.7 -72.1 -64.2 -62.5 -47.7 1992 -47.4 -44.8 -49.6 -55.2 -60.8 -66.9 -69.6 -72.6 -72.3 -70.0 -61.6 -54.5 1993 -50.7 -46.0 -48.8 -53.9 -64.1 -69.5 -70.0 -73.9 -73.0 -70.1 -65.3 -55.1 1994 -48.0 -46.1 -49.9 -54.2 -59.6 -65.9 -71.2 -73.7 -72.4 -70.0 -63.5 -50.4 1995 -46.5 -46.7 -48.9 -53.7 -59.9 -67.1 -72.5 -70.5 -70.2 -71.2 -66.2 -56.9 1996 -47.8 -48.0 -47.4 -52.7 -60.2 -66.7 -72.2 -69.9 -72.3 -70.2 -63.8 -54.9 1997 -44.9 -45.5 -47.8 -53.1 -59.9 -69.0 -71.3 -73.0 -69.1 -71.3 -59.7 -51.7 1998 -47.0 -46.7 -50.0 -54.4 -63.5 -67.3 -71.1 -73.6 -73.3 -69.3 -66.2 -57.1 1999 -48.8 -48.1 -48.0 -53.7 -58.5 -67.8 -69.7 -73.3 -72.3 -69.7 -67.0 -64.0 2000 -47.4 -47.1 -48.9 -53.3 -59.5 -68.3 -71.2 -74.9 -73.3 -68.1 -61.9 -47.7 2001 -45.4 -46.0 -48.9 -52.4 -63.0 -68.5 -72.2 -73.4 -72.6 -72.1 -66.3 -56.5 2002 -46.0 -45.1 -49.3 -52.9 -60.3 -63.9 -71.1 -72.0 -69.6 -60.5 -55.7 -46.6 2003 -45.8 -45.2 -47.6 -53.3 -62.5 -65.7 -71.1 -72.9 -74.0 -70.9 -62.8 -53.8 2004 -46.6 -47.1 -49.4 -51.3 -59.7 -66.5 -70.6 -73.8 -70.3 -69.5 -64.0 -52.7 2005 -45.3 -45.5 -47.9 -53.5 -59.9 -69.2 -72.3 -73.8 -72.4 -67.0 -63.8 -50.5 2006 -46.1 -48.8 -48.2 -53.5 -61.4 -71.1 -69.6 -75.5 -74.4 -70.9 -68.6 -61.2 2007 -49.7 -46.7 -47.6 -53.9 -61.2 -65.5 -73.2 -72.3 -74.2 -71.5 -63.9 -53.5 2008 -47.8 -45.8 -48.1 -53.5 -58.2 -66.7 -70.6 -72.7 -72.9 -70.5 -64.3 -59.3 2009 -48.4 -45.2 -48.5 -53.4 -60.9 -66.6 -70.3 -71.4 -72.9 -70.2 -56.2 -53.8 2010 -46.6 -46.9 -48.9 -54.6 -60.8 -66.0 -72.3 -73.1 -71.8 -69.4 -65.5 -53.4 2011 -47.9 -45.5 -49.7 -53.7 -58.7 -68.8 -70.0 -71.4 -73.1 -68.0 -66.6 -56.7 2012 -49.7 -48.9 -47.6 -51.4 -61.8 -65.7 -70.8 -73.4 -72.3 -70.3 -54.4 -47.2 2013 -46.1 -45.7 -47.1 -53.0 -61.4 -66.9 -69.6 -72.7 -70.9 -67.2 -53.3 -46.8 2014 -46.7 -46.2 -48.7 -53.1 -59.4 -67.3 -72.2 -73.3 -72.5 -69.6 -62.9 -54.7 2015 -47.5 -45.9 -49.0 -52.7 -62.8 -67.8 -72.4 -73.5 -72.0 -71.9 -68.0 -59.8 2016 -51.0 -46.2 -49.8 -56.8 -63.5 -67.3 -70.8 -73.1 -71.1 -69.5 -60.9 -50.0 2017 -47.0 -47.0 -49.0 -52.9 -61.5 -68.3 -72.0 -72.7 -70.6 -68.1 -54.6 -47.0 2018 -46.5 -45.8 -49.1 -54.1 -63.2 -66.8 -71.1 -73.3 -72.5 -69.5 -63.0 -48.1 2019 -48.1 -47.5 -48.3 -52.5 -59.1 -68.1 -73.1 -75.2 -68.8 -68.2 -53.8 -49.5 2020 -45.9 -45.4 -47.5 -55.5 -62.4 -67.9 -70.8 - -71.6 -71.6 - - 2021 - - -47.8 -55.5 -61.7 -66.9 -71.3 -73.9 -73.6 -71.7 -67.3 -59.5 2022 -50.1 -47.5 -48.9 -53.2 -63.6 -68.6 -71.7 -73.3 -73.6 -70.9 -66.6 -61.1 2023 -47.6 -47.3 -49.4 -54.2 -62.4 -67.3 -72.9 -71.5 - -70.8 -64.7 -54.6 2024 -48.9 -46.8 -50.2 -53.8 - - - - - - - -