Davis 12Z 300hPa temperature 1971 - - - - - - - - - -60.2 -54.1 -51.4 1972 -51.6 -50.9 -53.4 - - - - - - - - -51.3 1973 -52.3 -51.0 -51.6 - - - - - - -59.6 -55.8 -54.3 1974 -52.6 -50.4 -53.4 - - - - - - -59.3 -55.5 -52.3 1975 -50.5 -52.1 -49.2 - - - - - - - -55.8 -52.1 1976 - -52.5 -52.6 - - - - - - -62.1 -54.6 -51.2 1977 -52.0 -51.7 -52.2 - - - - - - -58.1 -56.2 -53.4 1978 -52.5 - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - -51.1 -55.5 -59.2 -61.4 -61.5 -61.0 -61.1 -59.9 -56.8 -49.9 1990 -50.8 -49.6 -52.1 -54.8 -56.3 -60.6 -58.4 -62.3 -63.2 -58.1 -55.8 -52.1 1991 -51.8 -51.4 -50.8 -56.6 -58.0 -57.5 -59.3 -59.9 -61.9 -59.4 -56.8 -51.0 1992 -53.4 -51.6 -54.6 -53.7 -56.9 -57.3 -60.0 -63.1 -62.4 -61.0 -55.8 -54.5 1993 -52.5 -51.2 -54.1 -56.2 -56.7 -61.6 -59.4 -61.5 -60.9 -59.7 -57.0 -54.5 1994 -52.0 -51.5 -54.1 -55.7 -58.1 - -60.8 -62.8 -62.4 -59.7 -53.9 -53.4 1995 -51.6 -51.5 -53.8 -54.7 -58.0 -61.3 -59.6 -61.3 -62.5 -59.5 -57.2 -54.3 1996 -52.1 -51.5 -53.3 -55.0 -59.6 -58.1 -60.5 -60.0 -57.8 -59.2 -56.8 -52.9 1997 -50.0 -50.6 -52.3 -56.1 -58.1 -60.5 -63.1 -61.1 -62.3 -60.1 -53.1 -52.6 1998 -52.9 -53.0 -52.9 -54.0 -59.0 -58.4 -60.2 -62.1 -61.3 -60.8 -57.0 -55.2 1999 -52.2 -53.1 -55.0 -59.0 -58.2 -59.3 -61.8 -62.0 -59.7 -60.3 -57.7 -57.0 2000 -52.6 -51.3 -55.0 -54.6 -58.5 -56.9 -60.4 -61.6 -61.0 -59.3 -56.8 -51.6 2001 -50.0 -51.2 -53.9 -56.5 -57.6 -58.1 -60.8 -62.8 -61.9 -60.6 -58.8 -53.6 2002 -50.7 -50.9 -53.4 -54.7 -56.1 -58.4 -60.7 -61.3 -61.2 -54.8 -55.4 -50.9 2003 -50.2 -51.1 -53.0 -55.9 -58.8 -59.0 -62.4 -61.2 -60.6 -61.2 -56.8 -52.5 2004 -50.3 -51.0 -53.5 -54.9 -58.6 -59.4 - -64.6 -62.3 -58.6 -56.3 - 2005 - - - - - - - - - - -57.3 -52.0 2006 -52.2 -53.3 - - - - - - - - -55.3 -56.7 2007 -51.5 -53.3 -51.8 -54.9 -56.1 -59.0 -59.8 -61.2 -62.0 -59.9 -57.1 -53.8 2008 -53.5 -52.5 - - - - - - - - - -55.6 2009 -51.4 -50.7 - - - - - - - - -54.2 -53.6 2010 -50.2 -49.5 -54.4 -56.8 -58.0 -61.2 -62.5 -62.4 -59.9 -60.1 -57.7 -53.3 2011 -49.7 -50.3 -54.2 -54.0 -57.3 -58.3 -59.4 -60.6 -61.5 -59.5 -55.5 -55.6 2012 -53.1 -51.1 -52.8 -55.4 -59.1 -60.5 -61.7 -61.5 -61.3 -57.7 - -51.5 2013 -49.5 - - - - - - - - - -51.3 -50.4 2014 -51.9 -50.2 -52.3 -57.2 -55.5 -59.2 -61.3 -62.8 -60.4 -60.6 -56.1 -53.6 2015 -50.7 - -54.9 -57.9 -56.4 -60.7 -62.2 -62.2 -63.5 -60.2 -55.2 -54.8 2016 -53.8 -50.0 - - - - - - - - -54.0 -52.5 2017 -50.8 -51.0 -52.2 -54.9 -58.2 -60.9 -60.4 -61.6 -60.8 -58.1 -55.9 -50.0 2018 -50.1 -48.6 -52.1 -54.9 -59.4 -58.9 -61.0 -60.6 -62.7 -60.9 -57.5 -52.2 2019 -50.9 -51.0 -53.5 -55.0 -59.6 -59.8 -60.9 -62.1 -60.8 -55.3 -54.4 -52.6 2020 -50.2 -51.2 -51.7 -54.1 -57.4 -59.9 -59.7 -62.1 -61.3 -59.7 -56.8 -54.3 2021 -53.2 -52.7 -51.1 -55.5 -59.1 -60.7 -60.8 -61.3 -61.1 -59.7 -56.7 -54.5 2022 -50.9 -52.8 -53.5 -56.2 -58.0 -58.8 -61.7 -61.0 -63.2 -59.4 -57.7 -56.1 2023 -52.5 -51.8 -50.1 -54.6 -58.6 -59.1 -60.7 -60.1 -61.4 -60.3 -57.7 -52.2 2024 -51.4 -50.8 -53.4 -56.2 - - - - - - - -