Syowa 00Z 50hPa temperature 1968 - - -50.4 -60.9 -67.0 -79.2 -83.5 -82.8 -77.4 -57.0 -31.9 -36.3 1969 -38.7 -42.6 -50.8 -61.5 -68.2 -79.7 -83.1 -80.7 -77.7 -69.3 -46.9 -36.7 1970 -37.6 -42.6 -49.0 -60.4 -69.9 -74.8 -84.1 -81.8 -78.2 -66.1 -41.8 -37.8 1971 -39.3 -43.0 -50.7 -60.9 -65.2 -75.3 -83.3 -78.5 -74.6 -63.1 -41.3 -39.4 1972 -38.7 -42.6 -50.7 -60.7 -72.2 -80.7 -83.4 -81.6 -80.7 -62.2 -40.8 -38.0 1973 -39.6 -43.8 -50.8 -59.1 -71.1 -76.7 -82.0 -81.8 -69.8 -66.8 -44.9 -37.7 1974 -39.3 -42.6 -51.6 -60.2 -70.6 -78.3 -81.8 -84.2 -70.7 -57.5 -37.9 -36.6 1975 -37.8 -43.2 -50.7 -61.0 -71.7 -80.1 -82.4 -75.8 -73.4 -64.7 -44.0 -37.9 1976 -39.6 -42.2 -50.0 -59.4 -71.9 -78.3 -83.5 -83.3 -76.4 -68.5 -41.1 -39.2 1977 -39.5 -44.1 -51.4 -60.3 -69.0 -76.1 -85.4 -83.0 -74.0 -58.6 -40.8 -36.6 1978 -36.8 -41.9 -48.7 -60.3 -70.1 -77.7 -83.4 -82.3 -75.5 -62.1 -40.2 -38.7 1979 -39.3 -43.1 -51.2 -58.5 -70.7 -78.1 -84.3 -81.7 -75.6 -46.3 -42.0 -38.6 1980 -38.5 -43.2 -49.1 -56.0 -65.3 -74.0 -82.0 -80.3 -76.9 -65.4 -45.6 -37.8 1981 -40.0 -45.1 -50.9 -61.1 -69.8 -76.8 -81.9 -80.4 -70.6 -59.9 -49.3 -39.6 1982 -40.9 -43.6 -51.2 -59.8 -72.4 -78.7 -82.8 -82.7 -75.9 -66.8 -41.9 -39.4 1983 -40.0 -43.8 -50.8 -59.5 -70.8 -79.5 -83.3 -82.3 -72.6 -68.7 -46.0 -39.4 1984 -40.7 -43.5 -50.4 -60.2 -67.8 -78.6 -84.3 -83.2 -76.8 -63.2 -47.1 -39.9 1985 -41.3 -44.8 -52.7 -60.9 -71.5 -82.7 -81.8 -82.3 -80.2 -72.0 -53.6 -40.9 1986 -41.2 -44.6 -51.5 -61.3 -65.9 -77.8 -80.9 -81.4 -77.7 -61.3 -48.2 -40.6 1987 -41.0 -43.8 -49.9 -58.7 -73.0 -79.5 -82.5 -85.0 -79.5 -72.8 -56.9 -38.4 1988 -40.9 -44.0 -51.9 -61.2 -70.8 -78.3 -82.4 -75.2 -61.7 -52.6 -40.8 -40.0 1989 -41.3 -45.1 -51.5 -61.1 -69.4 -79.3 -84.2 -84.8 -77.6 -69.0 -52.0 -38.7 1990 -40.1 -43.6 -51.5 -60.1 -67.8 -81.1 -83.2 -82.0 -79.7 -64.0 -51.3 -39.4 1991 -40.4 -44.6 -50.5 -59.6 -70.7 -76.7 -81.5 -81.5 -76.3 -51.6 -45.9 -40.2 1992 -41.2 -43.7 -51.4 -61.5 -68.7 -74.3 -79.0 -81.9 -77.5 -69.3 -48.6 -38.8 1993 -40.8 -43.5 -48.7 -60.0 -72.0 -81.0 -82.9 -83.0 -76.5 -68.6 -50.4 -38.9 1994 -40.0 -45.1 -51.8 -60.2 -68.9 -75.9 -83.8 -85.0 -81.4 -65.8 -38.1 -37.9 1995 -39.7 -44.4 -51.5 -59.7 -71.4 -80.7 -85.4 -80.2 -72.8 -75.2 -51.0 -43.5 1996 -40.1 -44.7 -50.9 -60.3 -73.0 -77.6 -82.3 -80.4 -77.7 -76.9 -60.7 -40.5 1997 -39.9 -43.9 -51.2 -61.8 -70.0 -81.7 -83.6 -80.7 -73.6 -75.7 -43.9 -39.1 1998 -40.5 -43.5 -50.9 -59.8 -70.7 -77.0 -84.6 -84.7 -81.0 -73.5 -57.5 -43.4 1999 -41.8 -45.1 -50.9 -61.0 -70.5 -79.9 -83.3 -84.2 -76.1 -71.9 -62.1 -45.5 2000 -40.2 -43.4 -51.3 -59.9 -70.9 -80.4 -84.7 -83.5 -75.0 -64.1 -52.5 -40.0 2001 -40.1 -44.8 -49.4 -60.2 -71.0 -78.7 -84.2 -85.2 -80.9 -77.4 -60.7 -38.1 2002 -40.4 -43.2 -49.1 -58.9 -65.7 -70.9 -80.3 -82.4 -67.8 -53.2 -37.6 -40.8 2003 -41.4 -44.4 -50.9 -60.7 -72.7 -79.2 -85.3 -83.9 -80.6 -73.1 -46.9 -38.8 2004 -40.5 -44.9 -50.2 -58.4 -70.4 -80.0 -83.7 -80.1 -73.1 -69.1 -47.8 -38.6 2005 -40.4 -44.1 -51.1 -62.1 -68.4 -79.2 -84.0 -82.0 -79.2 -67.6 -48.6 -41.1 2006 -40.9 -43.9 -49.6 -59.0 -72.4 -81.7 -82.4 -85.2 -81.6 -80.5 -64.0 -39.5 2007 -40.3 -43.3 -49.6 -60.0 -71.3 -77.7 -84.8 -83.0 -80.7 -74.1 -52.0 -43.8 2008 -40.1 -43.8 -51.5 -59.4 -67.6 -79.6 -85.3 -84.5 -81.4 -69.8 -54.7 -42.1 2009 -41.6 -44.3 -50.8 -61.6 -71.6 -79.3 -83.5 -84.6 -78.6 -77.2 -42.0 -35.7 2010 -40.8 -44.4 -51.3 -60.3 -73.1 -79.4 -83.0 -82.4 -79.6 -72.0 -55.3 -45.1 2011 -41.8 -45.2 -51.4 -59.5 -70.2 -81.1 -85.1 -82.9 -81.5 -66.1 -59.2 -45.0 2012 -39.1 -44.0 -49.6 -60.3 -71.7 -79.9 -81.7 -80.0 -76.0 -63.1 -45.2 -40.4 2013 -40.9 -43.5 -50.7 -62.3 -71.8 -81.0 -83.5 -82.9 -70.5 -62.0 -46.6 -40.4 2014 -41.3 -43.4 -51.0 -60.6 -71.4 -79.7 -84.9 -84.0 -80.6 -72.4 -50.4 -41.1 2015 -40.9 -44.0 -51.4 -61.6 -73.5 -79.9 -84.1 -85.1 -78.4 -76.4 -55.5 -43.8 2016 -40.4 -44.6 -51.7 -61.7 -71.5 -79.0 -84.7 -82.5 -78.0 -71.2 -44.6 -38.4 2017 -41.2 -44.5 -52.1 -61.7 -73.1 -80.0 -84.7 -82.5 -72.4 -67.6 -52.3 -40.7 2018 -41.6 -44.7 -52.6 -58.2 -72.4 -80.6 -84.4 -85.4 -81.8 -70.8 -56.1 -39.7 2019 -40.8 -44.4 -50.3 -59.7 -71.2 -80.6 -81.5 -81.3 -60.0 -61.1 -41.0 -42.0 2020 -41.3 -42.7 -50.9 -59.2 -70.9 -81.9 -82.7 -81.6 -77.4 -78.9 -69.2 -49.0 2021 -39.8 -43.1 -52.4 -59.6 -72.2 -80.0 -84.8 -83.4 -81.9 -73.6 -61.9 -43.9 2022 -41.7 -43.8 -51.3 -60.8 -72.2 -81.2 -84.4 -85.7 -80.7 -76.5 -54.3 -43.4 2023 -40.8 -45.0 -52.1 -61.0 -70.9 -79.5 -85.0 -81.9 -77.6 -73.0 -60.7 -41.1 2024 -41.6 -45.7 -52.0 -60.0 - - - - - - - -