Campbell 12Z temperature 1961 - - - 7.2 5.9 5.2 4.0 5.9 5.1 7.1 6.4 8.6 1962 8.6 9.5 8.9 7.2 7.0 6.5 5.4 5.5 6.1 5.7 7.3 8.7 1963 8.8 9.5 8.0 7.3 5.6 5.0 4.6 4.2 5.4 6.0 5.2 6.2 1964 7.7 8.2 7.7 6.9 6.2 5.0 5.6 4.1 5.9 5.9 5.5 8.3 1965 9.0 7.8 9.1 6.8 6.0 5.5 4.9 5.4 5.7 4.9 5.7 6.8 1966 7.5 8.1 8.2 7.5 6.6 5.3 4.8 5.6 5.7 5.6 6.3 6.6 1967 8.5 7.9 8.7 6.6 5.0 6.3 4.7 5.8 4.4 6.4 5.1 7.6 1968 7.6 8.4 8.6 8.2 7.6 5.4 5.3 5.7 5.0 5.4 6.9 8.0 1969 9.5 8.3 7.5 6.4 5.6 4.6 5.8 5.9 6.3 4.9 7.1 9.0 1970 7.5 8.5 8.2 6.9 5.9 5.8 5.3 5.9 - - 6.8 6.8 1971 8.5 9.3 8.3 7.9 6.8 5.0 5.8 5.5 4.7 5.7 6.4 8.4 1972 8.1 8.8 8.5 6.2 5.5 3.6 4.2 4.5 5.1 5.1 6.0 6.9 1973 8.3 8.6 8.6 7.0 4.3 5.4 5.7 5.1 5.8 5.3 5.1 7.7 1974 8.2 8.7 7.9 7.9 5.9 4.0 3.9 4.7 6.6 5.2 7.1 9.1 1975 10.0 9.2 9.0 8.0 5.5 4.8 5.0 4.8 5.3 5.5 6.2 5.9 1976 7.7 7.2 8.2 7.4 6.4 4.2 4.5 4.4 5.6 4.7 5.5 8.7 1977 8.4 8.7 8.7 6.9 5.5 4.6 4.4 6.1 4.7 5.4 7.0 8.2 1978 9.3 9.2 7.8 8.4 7.1 4.5 5.6 6.5 6.1 6.5 6.8 8.0 1979 8.0 8.4 8.1 8.3 6.2 6.5 6.5 5.2 5.3 6.4 7.3 8.2 1980 8.6 9.6 8.9 7.9 6.6 5.7 5.1 6.0 6.0 6.0 5.0 7.4 1981 7.8 - 8.7 8.5 6.6 6.4 6.1 - - - - - 1982 - - - 8.3 7.2 6.3 5.3 5.7 6.4 5.2 - - 1983 - - - 6.5 5.0 5.5 5.5 6.1 4.4 6.1 - - 1984 - - - 7.4 6.2 6.2 5.3 5.4 6.4 - - - 1985 - - 8.4 8.0 6.3 7.1 5.7 5.8 5.7 - - - 1986 - - 9.0 8.3 5.8 5.6 4.3 4.6 5.1 - - - 1987 - - 8.5 7.3 6.3 4.5 4.7 5.8 4.5 - - - 1988 - - - 6.9 4.4 4.6 4.9 4.7 5.4 5.8 - - 1989 - - - 7.6 7.0 5.6 5.4 6.2 6.9 - - - 1990 - - - - - - - - - - - - 1991 - - - - - - - - - - - - 1992 - - - - 5.4 - 4.6 - 4.3 - - - 1993 - - - 7.3 6.5 5.2 6.6 5.3 4.9 - - - 1994 - - - 7.3 6.1 4.2 4.7 5.2 3.2 - - - 1995 8.3 8.1 7.9 8.5 7.0 3.0 3.0 4.8 5.4 4.9 5.9 7.3 1996 7.9 8.4 - 7.5 6.2 4.2 4.7 4.6 6.6 5.8 5.4 8.0 1997 8.5 8.9 7.9 6.7 6.6 5.6 5.7 5.1 4.3 4.8 5.4 6.4 1998 8.0 - 7.6 7.0 5.8 5.7 5.0 4.7 5.9 5.1 6.2 7.4 1999 8.6 10.2 8.2 7.4 7.3 - 5.5 5.0 6.1 - - - 2000 - - - 7.1 - 5.7 6.2 4.4 5.9 - - - 2001 - - - - - - - - - - - - 2002 - - - - - - - - - - - - 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - 3.2 5.1 5.7 5.0 5.8 7.8 2008 9.0 9.0 8.5 7.1 5.7 5.7 4.9 4.7 - 5.4 5.2 7.0 2009 8.8 6.9 8.3 8.4 5.3 4.8 3.9 6.6 5.5 4.7 4.9 7.0 2010 7.9 8.4 7.8 6.6 6.4 5.4 5.8 5.0 4.4 6.4 7.0 7.8 2011 7.7 8.3 8.0 7.3 6.0 6.0 3.8 5.1 4.8 5.5 5.9 7.9 2012 7.9 8.8 8.4 8.2 6.8 3.7 6.2 6.1 6.3 4.8 6.1 8.4 2013 9.0 9.0 9.0 7.5 6.4 5.1 5.7 6.3 5.3 5.7 5.7 7.8 2014 8.1 8.6 8.9 7.4 6.8 6.8 5.7 5.4 5.8 5.4 6.5 8.2 2015 8.4 8.1 8.9 7.3 6.7 4.5 5.5 5.4 4.6 5.2 6.2 7.5 2016 7.5 8.6 8.1 7.5 6.8 6.1 5.6 5.4 6.2 6.6 6.5 8.0 2017 7.3 9.2 8.3 8.0 7.3 6.1 4.6 5.0 5.8 6.4 7.1 8.7 2018 9.7 8.9 8.8 6.9 5.9 6.2 5.8 6.2 6.7 6.0 7.2 8.7 2019 8.7 9.3 9.9 8.6 6.9 6.3 6.2 4.2 4.9 5.1 7.0 8.2 2020 9.1 8.8 8.4 8.2 7.7 6.2 5.8 4.5 4.7 6.5 7.0 7.7 2021 9.0 9.4 9.1 7.5 7.0 5.7 5.7 5.5 5.2 5.7 6.8 - 2022 8.5 9.1 8.9 7.9 7.2 6.3 4.2 5.9 5.7 5.6 7.6 8.1 2023 10.0 10.2 9.3 8.6 7.1 7.1 5.9 6.1 5.7 5.7 6.7 7.5 2024 8.5 8.6 7.2 7.9 - - - - - - - -