Syowa 12Z 50hPa temperature 1959 - - - -56.0 - - - - - - - - 1960 - - - - - - - - - - -43.8 -34.8 1961 - -40.1 -45.6 -56.1 -65.0 -75.5 - -80.7 -74.5 -62.0 -45.1 -36.9 1962 - - - - - - - - - - - - 1963 - - - - - - - - - - - - 1964 - - - - - - - - - - - - 1965 - - - - - - - - - - - - 1966 - -41.7 -44.5 -56.8 -62.4 -74.6 - -80.8 -75.9 -56.9 -38.8 -35.1 1967 -37.1 -40.3 -47.6 -57.1 - -78.1 -85.1 -81.7 -70.8 -49.9 -41.0 -36.7 1968 -36.3 -39.8 - - - - - - - - - - 1969 - - - - - - - - - - - - 1970 - - - - - - - - - - - - 1971 - - - - - - - - - - - - 1972 - - - - - - - - - - - - 1973 - - - - - - - - - - - - 1974 - - -49.5 -59.2 -69.7 -78.1 -81.7 -82.0 -68.5 -55.9 -36.1 -35.8 1975 -36.4 -40.6 -48.2 -59.7 -71.6 -80.7 -81.8 -74.5 -71.2 -62.7 -42.4 -37.1 1976 -38.5 -40.4 -47.3 -58.2 -70.5 -78.2 -83.6 -81.3 -73.7 -65.1 -39.8 -38.1 1977 -38.0 -42.2 -49.5 -59.0 -68.8 -75.4 -85.7 -81.7 -71.5 -56.0 -39.8 -35.6 1978 -35.7 -39.7 -46.5 -58.2 -69.8 -78.0 -83.6 -81.1 -71.6 -59.9 -38.5 -37.3 1979 -38.0 -40.5 -48.3 -57.1 -70.6 -78.5 -83.5 -80.3 -74.0 -45.1 -40.2 -37.6 1980 -36.7 -41.7 -48.3 -55.2 -65.5 -74.5 -82.0 -80.0 -76.5 -64.2 -44.2 -36.6 1981 -39.1 -44.3 -50.6 -60.7 -70.1 -75.8 -81.8 -81.2 -69.8 -59.4 -48.0 -38.8 1982 -40.0 -42.7 -50.4 -59.5 -72.6 -78.6 -82.6 -82.4 -76.1 -70.6 -41.1 -38.7 1983 -39.2 -42.5 -50.1 -59.8 -71.3 -79.3 -83.3 -82.5 -72.1 -67.4 -44.4 -38.4 1984 -39.8 -42.9 -50.0 -60.4 -68.3 -78.8 -84.8 -83.4 -76.5 -62.3 -45.9 -39.0 1985 -40.2 -44.2 -52.3 -61.2 -70.5 -82.5 -81.5 -82.2 -79.8 -71.3 -51.5 -40.0 1986 -40.4 -43.9 -50.7 -61.5 -66.4 -78.0 -81.4 -81.4 -77.2 -60.2 -46.5 -39.6 1987 -40.1 -43.1 -49.8 -59.3 -73.1 -79.9 -82.4 -85.1 -79.0 -72.1 -55.6 -36.7 1988 -39.8 -43.2 -52.0 -61.7 -71.0 -78.5 -82.5 -74.7 -61.6 -52.0 -39.9 -39.0 1989 -40.4 -44.7 -51.6 -61.3 -69.4 -79.3 -84.1 -84.3 -77.1 -68.0 -50.5 -37.8 1990 -39.4 -43.0 -51.3 -60.3 -67.9 -81.3 -82.9 -81.6 -79.4 -62.9 -49.8 -38.8 1991 -39.4 -44.3 -50.0 -59.6 -70.4 -76.6 -81.2 -81.2 -76.3 -50.5 -44.4 -39.2 1992 -40.0 -42.8 -51.2 -61.6 -69.0 -74.1 -79.2 -81.9 -76.7 -68.4 -47.3 -38.0 1993 -40.0 -42.7 -49.1 -60.1 -72.5 -81.4 -82.9 -82.8 -75.9 -67.3 -49.4 -37.8 1994 -38.9 -44.2 -51.5 -60.3 -69.0 -75.6 -83.8 -85.5 -80.7 -64.9 -37.5 -37.5 1995 -38.8 -43.7 -51.3 -60.2 -71.8 -80.7 -84.8 -80.9 -72.7 -74.9 -49.6 -42.4 1996 -39.4 -43.8 -51.1 -60.8 -73.9 -77.4 -82.4 -80.7 -78.0 -76.4 -58.9 -39.7 1997 -39.2 -43.3 -51.0 -62.4 -70.5 -81.8 -83.5 -80.9 -74.0 -74.6 -42.3 -38.3 1998 -39.8 -43.2 -50.6 -60.0 -71.1 -76.7 -84.6 -85.2 -81.1 -73.0 -56.6 -41.6 1999 -40.7 -44.2 -51.1 -61.6 -70.4 -79.9 -83.6 -84.7 -75.7 -71.2 -59.7 -44.6 2000 -39.4 -42.2 -51.0 -60.7 -71.8 -80.5 -85.0 -83.9 -74.8 -63.7 -51.0 -39.2 2001 -39.1 -44.2 -49.6 -60.6 -71.5 -78.9 -84.3 -85.8 -80.5 -76.5 -58.7 -37.2 2002 -39.2 -42.3 -48.9 -59.6 -66.2 -70.9 -80.6 -82.8 -68.8 -52.2 -36.9 -40.0 2003 -40.8 -43.7 -51.0 -60.9 -73.3 -79.4 -85.7 -84.7 -80.2 -72.4 -45.9 -38.1 2004 -40.0 -44.1 -50.0 -58.2 -70.3 -80.2 -83.9 -80.4 -72.4 -68.3 -46.6 -37.5 2005 -39.6 -43.2 -50.9 -62.7 -68.5 -79.5 -84.0 -82.6 -79.0 -66.3 -47.4 -40.3 2006 -40.1 -43.3 -49.7 -59.6 -72.9 -81.7 -82.3 -85.9 -81.6 -80.1 -62.2 -38.8 2007 -39.6 -43.0 -49.7 -61.4 -71.4 -78.1 -85.1 -83.7 -81.0 -73.8 -50.5 -42.7 2008 -39.3 -43.3 -51.2 -59.7 -66.2 -80.0 -85.3 -84.9 -81.3 -69.8 -53.2 -41.0 2009 -40.7 -43.8 -50.6 -61.7 -70.6 -79.2 -83.3 -84.7 -78.9 -77.1 -40.6 -35.0 2010 -39.9 -43.7 -51.3 -60.5 -71.8 -79.6 -82.9 -82.9 -79.2 -72.5 -53.7 -43.6 2011 -40.9 -44.8 -51.5 -60.0 -70.2 -81.3 -85.3 -83.0 -81.4 -66.3 -58.1 -44.1 2012 -38.1 -43.6 -49.9 -61.2 -71.8 -79.9 -81.5 -80.6 -76.0 -62.0 -43.5 -39.5 2013 -39.8 -43.1 -51.1 -62.6 -71.6 -81.0 -83.7 -82.7 -70.4 -62.0 -45.2 -39.6 2014 -40.6 -42.8 -51.0 -60.8 -71.4 -79.7 -84.8 -84.1 -80.9 -72.5 -49.5 -40.2 2015 -40.3 -43.8 -51.2 -61.9 -73.9 -79.5 -84.2 -85.5 -78.5 -76.1 -54.2 -43.1 2016 -39.7 -44.4 -51.9 -62.5 -71.3 -78.9 -84.5 -82.9 -78.2 -70.8 -44.3 -37.9 2017 -40.7 -44.1 -52.2 -62.0 -72.7 -79.8 -84.4 -82.8 -71.7 -67.7 -51.9 -40.1 2018 -40.9 -44.7 -52.7 -58.7 -72.2 -80.5 -84.8 -85.4 -81.2 -70.7 -56.4 -39.1 2019 -40.6 -44.2 -50.0 -60.6 -71.4 -80.7 -81.4 -81.5 -60.2 -61.0 -40.3 -41.4 2020 -40.6 -42.4 -51.3 -60.1 -70.7 -81.7 -83.0 -82.0 -77.3 -78.5 -67.5 -48.3 2021 -39.4 -42.4 -52.3 -60.8 -73.6 -80.4 -84.7 -83.3 -81.7 -72.6 -61.7 -43.0 2022 -40.3 -43.3 -51.4 -61.9 -71.7 -81.6 -84.5 -85.9 -80.5 -75.6 -52.1 -42.5 2023 -40.3 -44.5 -51.3 -61.7 - - - -83.3 -77.9 -71.7 -60.8 -40.1 2024 -40.9 -45.4 -51.1 - - - - - - - - -