Davis 12Z 200hPa temperature 1971 - - - - - - - - - -66.9 -51.8 -48.4 1972 -45.2 -44.5 -47.1 - - - - - - - - -46.3 1973 -45.3 -43.2 -45.6 - - - - - - -68.3 -60.7 -53.0 1974 -43.3 -43.9 -47.0 - - - - - - -66.4 -55.7 -49.8 1975 -43.2 -44.1 -44.6 - - - - - - - -58.6 -47.4 1976 - -44.3 -46.7 - - - - - - -69.0 -54.9 -48.0 1977 -44.5 -46.4 -46.8 - - - - - - -60.8 -58.1 -46.2 1978 -43.9 - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - -45.9 -51.9 -57.8 -67.2 -71.1 -74.5 -72.7 -67.8 -61.5 -47.5 1990 -46.3 -44.2 -46.9 -54.4 -56.3 -66.3 -68.4 -71.9 -72.5 -66.3 -63.0 -53.1 1991 -46.3 -46.2 -48.2 -52.0 -59.2 -65.2 -71.5 -70.7 -71.7 -64.4 -60.9 -45.8 1992 -44.9 -45.9 -47.9 -53.4 -59.4 -61.6 -68.6 -71.6 -70.7 -69.8 -61.9 -52.9 1993 -51.0 -44.8 -47.9 -52.9 -56.3 -68.1 -66.5 -72.6 -71.2 -67.4 -63.4 -54.5 1994 -47.2 -45.8 -50.3 -56.8 -58.1 - -70.1 -71.4 -73.6 -67.4 -57.0 -51.4 1995 -47.2 -46.6 -48.1 -52.3 -59.7 -66.8 -69.9 -70.7 -69.8 -67.3 -61.8 -55.9 1996 -49.8 -48.6 -47.8 -51.7 -61.1 -64.8 -67.9 -71.2 -68.0 -70.0 -63.1 -50.4 1997 -45.0 -44.5 -47.6 -53.2 -57.1 -66.6 -70.9 -70.8 -68.4 -69.9 -55.5 -52.8 1998 -46.7 -47.8 -49.4 -52.2 -61.0 -64.2 -69.6 -72.9 -71.9 -69.2 -64.9 -57.7 1999 -49.6 -46.8 -49.6 -53.5 -58.9 -65.5 -70.7 -71.7 -69.7 -67.1 -64.7 -62.0 2000 -48.5 -46.3 -50.4 -54.8 -60.1 -69.0 -70.4 -72.6 -69.8 -63.7 -60.9 -47.7 2001 -44.4 -46.3 -47.8 -51.8 -58.2 -63.3 -71.2 -72.8 -71.7 -70.4 -67.7 -55.9 2002 -45.5 -45.0 -47.3 -51.4 -57.6 -60.4 -68.1 -70.5 -66.3 -57.3 -53.3 -45.9 2003 -47.7 -45.9 -46.8 -52.6 -60.8 -64.9 -72.7 -71.9 -71.8 -69.6 -60.5 -50.7 2004 -46.2 -48.6 -47.4 -51.4 -58.6 -63.1 - -70.6 -70.3 -67.7 -60.2 - 2005 - - - - - - - - - - -64.4 -50.0 2006 -46.8 -47.7 - - - - - - - - -68.2 -59.3 2007 -51.3 -46.1 -47.2 -53.4 -60.3 -64.9 -71.6 -72.6 -70.3 -68.1 -63.3 -55.3 2008 -47.2 -46.2 - - - - - - - - - -56.0 2009 -52.3 -49.2 - - - - - - - - -50.2 -51.1 2010 -47.7 -45.9 -48.8 -53.6 -61.7 -67.7 -69.9 -72.3 -72.8 -69.5 -65.5 -52.8 2011 -49.1 -44.3 -48.3 -51.5 -58.4 -69.1 -70.2 -70.3 -71.8 -66.0 -64.0 -56.0 2012 -49.2 -47.7 -47.2 -51.8 -60.0 -67.1 -69.6 -71.1 -69.1 -65.7 - -47.6 2013 -47.2 - - - - - - - - - -50.3 -45.9 2014 -46.3 -45.0 -47.6 -52.4 -61.9 -64.2 -72.4 -74.3 -72.6 -69.1 -59.3 -54.5 2015 -48.0 - -48.8 -53.2 -57.5 -67.7 -70.3 -72.3 -73.0 -71.5 -64.5 -61.9 2016 -49.5 -46.8 - - - - - - - - -54.9 -48.6 2017 -46.2 -44.2 -47.7 -52.2 -59.3 -67.4 -70.8 -71.3 -68.8 -65.5 -61.8 -47.5 2018 -46.0 -45.8 -49.0 -54.1 -60.6 -67.5 -71.6 -74.3 -72.1 -69.3 -63.7 -50.1 2019 -48.6 -46.1 -47.4 -53.7 -60.0 -68.0 -68.2 -71.2 -66.9 -61.2 -52.0 -49.0 2020 -46.9 -44.7 -45.4 -51.5 -60.5 -70.0 -71.6 -72.2 -71.1 -71.8 -68.3 -59.6 2021 -49.6 -46.3 -46.6 -52.0 -61.2 -66.2 -71.1 -73.1 -71.4 -70.3 -66.1 -59.5 2022 -47.6 -45.6 -49.5 -53.1 -60.1 -67.2 -71.6 -73.4 -72.0 -71.2 -64.9 -60.4 2023 -46.5 -46.8 -48.4 -54.0 -59.5 -65.2 -72.1 -71.6 -71.6 -68.8 -65.7 -54.2 2024 -52.4 -47.4 -50.3 -53.3 - - - - - - - -