Davis 12Z 150hPa temperature 1971 - - - - - - - - - -66.5 -50.3 -45.7 1972 -43.9 -43.6 -47.3 - - - - - - - - -43.9 1973 -43.2 -43.3 -45.8 - - - - - - -68.4 -58.1 -49.6 1974 -42.1 -44.0 -47.4 - - - - - - -64.7 -49.8 -45.8 1975 -42.2 -43.9 -45.3 - - - - - - - -55.8 -44.6 1976 - -43.8 -46.7 - - - - - - -69.3 -51.2 -46.0 1977 -43.2 -45.6 -47.2 - - - - - - -59.0 -54.5 -43.2 1978 -41.9 - - - - - - - - - - - 1979 - - - - - - - - - - - - 1980 - - - - - - - - - - - - 1981 - - - - - - - - - - - - 1982 - - - - - - - - - - - - 1983 - - - - - - - - - - - - 1984 - - - - - - - - - - - - 1985 - - - - - - - - - - - - 1986 - - - - - - - - - - - - 1987 - - - - - - - - - - - - 1988 - - - - - - - - - - - - 1989 - - -46.7 -52.6 -58.9 -67.8 -72.7 -77.3 -75.2 -69.1 -61.1 -45.5 1990 -44.9 -44.5 -47.6 -54.1 -57.1 -67.2 -70.4 -74.3 -74.7 -67.7 -62.4 -50.5 1991 -44.9 -46.1 -47.5 -52.0 -59.5 -66.0 -72.8 -72.9 -73.2 -64.3 -60.0 -44.8 1992 -43.7 -45.3 -48.1 -54.3 -59.2 -62.2 -69.5 -74.0 -72.4 -71.7 -62.5 -51.1 1993 -47.1 -43.6 -47.7 -53.7 -58.4 -69.9 -69.1 -75.8 -72.9 -68.8 -62.8 -52.4 1994 -45.9 -45.1 -49.4 -54.5 -58.6 - -71.6 -73.6 -76.1 -68.7 -53.7 -48.3 1995 -45.2 -45.4 -47.8 -52.3 -60.5 -67.8 -71.9 -72.9 -71.2 -70.0 -61.7 -55.7 1996 -47.6 -47.2 -48.2 -52.5 -62.2 -65.8 -71.0 -73.1 -68.7 -71.9 -64.2 -49.0 1997 -44.5 -44.7 -47.7 -53.3 -58.7 -67.9 -72.9 -72.6 -70.3 -71.4 -55.8 -50.8 1998 -45.3 -46.5 -49.0 -52.7 -60.7 -64.5 -71.9 -75.8 -74.2 -70.9 -66.3 -57.8 1999 -48.1 -46.0 -49.2 -53.9 -60.3 -67.2 -72.6 -74.5 -71.9 -69.4 -66.3 -61.4 2000 -48.0 -45.7 -49.6 -54.9 -60.8 -70.0 -72.8 -75.1 -72.3 -65.1 -61.2 -46.3 2001 -44.1 -45.7 -47.4 -53.0 -58.8 -64.6 -73.1 -75.6 -74.7 -72.7 -70.0 -54.9 2002 -43.7 -44.6 -47.5 -51.9 -57.1 -61.7 -69.2 -72.1 -66.3 -56.3 -51.7 -45.2 2003 -45.9 -45.0 -46.8 -53.2 -61.3 -66.1 -74.0 -74.9 -73.8 -71.3 -60.4 -49.3 2004 -45.3 -46.6 -46.9 -51.4 -58.7 -64.9 - -72.6 -72.1 -68.7 -59.5 - 2005 - - - - - - - - - - -64.0 -48.5 2006 -45.4 -46.2 - - - - - - - - -67.7 -58.1 2007 -48.8 -45.4 -47.2 -53.5 -60.9 -65.9 -73.3 -75.3 -72.3 -69.9 -62.9 -54.5 2008 -45.8 -45.1 - - - - - - - - - -54.2 2009 -49.7 -47.5 - - - - - - - - -47.6 -49.4 2010 -46.5 -45.6 -48.1 -53.3 -61.5 -68.7 -72.5 -75.2 -75.3 -72.2 -66.4 -51.2 2011 -47.7 -44.6 -48.5 -52.7 -59.5 -69.6 -72.8 -72.8 -74.2 -67.1 -63.8 -56.3 2012 -47.7 -46.5 -47.1 -52.9 -60.4 -67.6 -71.4 -72.9 -70.7 -66.0 - -46.2 2013 -45.5 - - - - - - - - - -51.0 -44.4 2014 -45.0 -44.7 -47.9 -53.1 -61.4 -66.0 -73.9 -76.6 -74.7 -69.6 -58.9 -52.9 2015 -46.1 - -49.0 -53.6 -59.6 -68.7 -72.5 -75.4 -75.7 -74.4 -66.0 -60.6 2016 -48.0 -45.9 - - - - - - - - -52.8 -46.5 2017 -44.8 -44.2 -48.2 -53.6 -60.9 -68.0 -72.9 -73.7 -70.0 -65.9 -62.0 -45.4 2018 -45.4 -45.0 -49.1 -53.3 -61.0 -68.1 -73.8 -76.7 -74.7 -70.8 -63.9 -48.3 2019 -46.7 -46.2 -47.2 -53.6 -60.2 -68.1 -70.3 -73.2 -65.6 -59.7 -49.0 -47.4 2020 -44.7 -43.5 -46.2 -52.2 -60.3 -71.1 -72.9 -73.8 -73.5 -74.3 -70.9 -60.2 2021 -47.4 -45.3 -47.8 -52.9 -62.4 -67.7 -73.6 -76.6 -74.4 -72.4 -68.6 -59.0 2022 -45.7 -44.8 -49.0 -53.7 -61.1 -68.0 -74.1 -75.7 -75.2 -73.6 -66.4 -60.4 2023 -45.3 -46.7 -48.5 -53.6 -60.8 -66.6 -74.3 -74.6 -73.7 -70.8 -66.4 -52.4 2024 -50.3 -46.6 -49.3 -53.4 - - - - - - - -