Whitlock 18Z temperature 1982 - -8.1 -17.9 -24.4 -23.9 -25.8 -27.8 -24.8 -27.0 -20.8 -10.3 -4.8 1983 -3.7 -8.4 -14.3 -18.1 -18.0 -24.8 -28.9 -26.1 -24.2 -19.7 -11.7 -5.6 1984 -4.2 -8.5 -14.6 -19.6 -20.7 -23.5 -26.1 -26.4 -25.1 -18.7 -11.3 -5.1 1985 -3.8 -8.9 -14.8 -22.2 -22.9 -24.7 -30.7 -26.0 -26.0 -20.6 -12.9 -6.7 1986 -5.3 -7.6 -15.3 -21.4 -19.0 -24.4 -25.6 -29.4 -30.7 -20.2 -12.3 -5.8 1987 -3.2 -8.8 -17.0 -23.0 -23.7 -20.3 -24.6 -27.1 -24.0 -18.2 -12.0 -4.8 1988 -4.0 -8.2 -16.7 -19.5 -21.9 -21.4 -26.2 -20.5 -21.9 -15.8 -11.8 -5.6 1989 -4.8 -8.5 -13.9 -18.5 -24.6 -28.7 -24.8 -26.7 -23.2 -19.3 -10.5 -4.3 1990 -3.9 -8.2 -16.1 -21.9 -22.6 -25.8 -23.3 -28.3 -28.4 -20.0 -10.8 -5.0 1991 -4.3 -6.0 -16.3 -21.6 -23.9 -21.4 -25.3 -25.9 -21.7 -19.2 - -4.6 1992 - - - - - - - - - - - - 1993 - - - - - - - - - - - - 1994 - - -20.9 -19.4 -27.9 -24.8 -24.2 -29.4 -26.9 -18.7 -10.5 -5.2 1995 -5.6 -8.1 -18.3 -24.6 -26.4 -25.9 -25.5 -26.0 -25.8 -19.9 -10.4 -3.9 1996 -4.8 -7.7 -14.5 -19.3 -25.4 -25.5 -27.4 - - -22.1 -10.2 -4.3 1997 -4.6 -9.7 -19.4 -25.8 -24.4 -23.1 - - - - -7.5 -5.3 1998 -5.4 -8.2 -20.0 - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - -18.5 -22.1 -24.2 -22.0 -24.4 -30.8 -25.0 -19.3 -11.0 -4.0 2002 -3.8 -8.1 -15.1 -22.1 -20.8 -26.9 -28.7 -30.1 -22.3 -19.2 -11.8 -5.9 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -