#year ave. max. mon. date min mon. date
1961 15.9 37.5 7 15 -4.4 2 03
1962 15.4 37.6 8 04 -3.8 1 22
1963 15.0 37.2 8 13 -5.5 1 27
1964 15.3 35.2 8 13 -2.8 1 21
1965 14.6 35.0 8 23 -4.7 2 04
1966 15.5 34.9 8 08 -3.2 2 24
1967 15.7 37.2 8 11 -4.0 2 13
1968 15.6 33.5 8 25 -2.9 2 22
1969 15.6 36.6 7 30 -2.1 1 14
1970 15.2 35.5 8 29 -4.0 1 17
1971 15.0 34.4 8 11 -2.2 1 11
1972 15.7 35.2 8 08 -2.1 1 07
1973 15.7 34.7 7 18 -1.9 2 09
1974 15.2 34.2 8 07 -2.7 2 11
1975 15.6 35.6 7 18 -2.6 2 18
1976 15.0 35.4 8 24 -3.9 1 22
1977 15.8 34.9 8 09 -3.8 2 01
1978 16.1 36.3 8 22 -2.0 2 03
1979 16.9 34.3 7 31 -0.5 1 29
1980 15.4 33.0 7 23 -1.2 2 15
1981 15.0 34.3 7 17 -3.5 2 27
1982 16.0 33.0 8 22 -1.0 2 08
1983 15.7 37.1 8 19 -2.4 1 23
1984 14.9 38.1 9 03 -3.5 2 09
1985 15.7 35.0 9 02 -2.5 1 30
1986 15.2 34.6 8 05 -1.6 2 09
1987 16.3 37.3 7 24 -0.7 2 02
1988 15.4 32.9 8 23 -1.7 2 22
1989 16.4 33.5 8 10  0.9 1 28
1990 17.0 35.9 8 24 -1.4 1 27
1991 16.4 35.6 7 25 -0.8 2 25
1992 16.0 35.2 9 03 -0.5 2 01
1993 15.5 32.9 8 12  0.7 12 24
1994 16.9 39.1 8 03 -2.3 2 14
1995 16.3 36.4 8 28 -1.2 1 15
1996 15.8 38.7 8 15 -1.5 2 03
1997 16.7 37.7 7 05 -2.1 1 22
1998 16.7 36.1 7 04 -0.8 1 26
1999 17.0 34.8 8 23 -1.4 2 04
2000 16.9 37.8 9 02 -0.7 1 28
2001 16.5 38.1 7 24 -2.4 1 15
2002 16.7 35.8 8 11 -0.3 1 04
2003 16.0 34.3 9 13 -0.8 1 16
2004 17.3 39.5 7 20  0.2 12 31
2005 16.2 36.2 6 28 -0.8 12 19
2006 16.4 36.1 7 15 -1.5 2 05