Whitlock 12Z temperature 1982 - -7.8 -17.7 -24.2 -24.0 -25.6 -27.8 -25.1 -26.7 -20.6 -10.8 -4.8 1983 -4.1 -8.4 -14.3 -18.3 -17.9 -24.8 -28.8 -25.8 -24.0 -19.2 -11.9 -5.7 1984 -4.4 -8.2 -14.6 -19.6 -20.6 -24.1 -25.8 -26.0 -25.1 -18.3 -11.4 -5.3 1985 -4.0 -8.8 -14.5 -22.7 - -24.8 -30.5 -26.5 -25.5 -20.3 -12.9 -6.8 1986 -5.3 -7.7 -14.7 -21.5 -18.8 -24.3 -25.7 -29.2 -30.5 -19.9 -12.4 -6.4 1987 -3.8 -9.1 -17.0 -22.8 -23.5 -20.1 -25.2 -26.9 -24.1 -18.4 -12.6 -5.2 1988 -4.5 -8.4 -16.5 -19.3 -21.8 -21.6 -26.0 -20.8 -22.0 -15.5 -12.0 -6.0 1989 -4.9 -8.6 -14.1 -18.6 -25.1 -28.7 -25.0 -26.9 -23.3 -18.8 -11.3 -5.1 1990 -4.2 -8.2 -15.8 -22.0 -22.7 -25.7 -23.3 -28.2 -28.3 -20.2 -10.8 -5.0 1991 -4.6 -6.2 -16.1 -21.2 -24.5 -21.0 -25.2 -24.7 -22.4 -19.0 -11.8 -5.0 1992 - - - - - - - - - - - - 1993 -4.5 -8.1 -15.9 -22.3 - - - - - -21.6 - - 1994 - - -20.0 -19.2 -27.8 -24.4 -24.0 -29.3 -26.4 -18.2 -11.0 -6.0 1995 -6.1 -8.6 -18.0 -24.7 -26.9 -26.0 -25.8 -25.4 -26.2 -19.9 -11.3 -4.5 1996 -5.4 -7.9 -14.0 -19.1 -26.0 -25.4 -27.3 - - -22.4 -11.6 -5.2 1997 -5.4 -9.7 -19.0 -25.9 -25.1 -22.6 - - - - -8.2 -6.1 1998 -6.0 -8.9 -19.8 - - - - - - - - - 1999 - - - - - - - - - - - - 2000 - - - - - - - - - - - - 2001 - - -17.9 -22.5 -23.4 -22.2 -24.6 -30.7 -25.1 -19.4 -11.8 -4.3 2002 -3.9 -8.6 -14.9 -21.7 -20.5 -26.4 -28.7 -30.0 -22.2 -19.3 -12.4 -7.4 2003 - - - - - - - - - - - - 2004 - - - - - - - - - - - - 2005 - - - - - - - - - - - - 2006 - - - - - - - - - - - - 2007 - - - - - - - - - - - - 2008 - - - - - - - - - - - - 2009 - - - - - - - - - - - -