"station_id" "year" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec" 171628 1970 -10.3 -6.0 -1.5 4.7 12.7 17.3 21.0 19.5 13.5 9.8 2.4 -8.1 171628 1971 -7.9 -5.2 -2.0 4.3 12.0 17.4 19.6 19.0 16.0 10.4 0.1 -6.3 171628 1972 -6.3 -7.0 -3.5 2.9 12.7 16.9 19.8 17.8 14.5 6.4 0.5 -7.5 171628 1973 -4.7 -4.8 2.1 6.3 10.7 18.0 21.1 21.0 13.3 8.4 1.0 -1.4 171628 1974 -6.3 -6.3 -1.0 5.6 9.9 17.1 19.4 19.0 13.7 5.6 1.7 171628 1975 8.7 3.5 -5.9 171628 1976 -6.9 -5.7 -2.5 6.3 11.5 18.7 19.0 18.2 13.7 6.1 -0.4 -8.1 171628 1977 -8.5 -7.5 1.5 4.8 12.4 15.6 19.4 18.2 12.6 7.5 2.6 -6.2 171628 1978 -8.8 -7.0 -3.5 3.7 13.1 16.8 19.7 18.8 11.7 6.5 0.1 -6.3 171628 1979 -5.7 -7.7 1.1 5.5 12.5 17.1 20.7 17.7 13.6 7.2 4.0 -4.0 171628 1980 -7.5 -7.7 -2.0 5.9 11.5 15.4 19.5 19.8 12.7 5.8 -6.5 171628 1981 -7.8 -2.3 0.1 6.0 13.3 17.7 19.8 18.5 13.2 6.1 1.6 -3.9 171628 1982 -8.1 -6.6 -2.1 4.2 12.4 14.8 19.7 16.3 13.9 7.1 2.6 -2.9 171628 1983 -6.2 -5.6 0.2 5.6 10.5 17.1 19.0 15.7 7.4 2.2 -5.4 171628 1984 -7.8 -2.1 -3.8 6.0 11.6 16.9 20.3 19.9 12.5 8.1 1.7 -4.5 171628 1985 -9.0 -4.7 -1.1 5.3 11.9 14.7 20.2 16.8 13.7 7.4 0.2 -6.2 171628 1986 -6.2 -7.2 -1.6 7.6 12.8 15.2 18.5 18.2 12.7 6.2 -0.8 -5.9 171628 1987 -7.2 -7.4 0.4 7.7 13.5 17.3 19.9 17.7 13.4 7.1 0.1 -4.6 171628 1988 -5.8 -6.3 -1.2 5.7 13.6 17.0 22.1 20.2 13.2 5.5 3.2 -6.9 171628 1989 -6.4 -7.4 -3.0 4.2 15.1 17.8 19.5 13.5 8.3 -0.4 -9.1 171628 1990 -5.0 -6.6 -0.4 5.6 10.8 17.2 20.3 20.4 13.9 9.6 2.7 -2.8 171628 1991 -7.8 -5.0 -0.8 6.1 13.8 17.6 19.4 19.7 13.2 9.0 2.8 -6.6 171628 1992 -8.0 -6.2 -3.1 3.9 11.9 16.9 17.5 18.2 14.3 6.4 0.4 -4.5 171628 1993 -7.2 -8.1 -3.3 5.3 12.7 16.9 19.6 19.9 13.9 5.5 1.5 -3.1