"station_id" "year" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec" 170814 1970 -11.1 -8.2 -4.7 1.7 8.8 15.1 19.0 17.9 12.1 7.7 0.8 -9.4 170814 1971 -8.4 -6.8 -5.3 1.6 9.3 14.5 17.7 16.9 13.8 9.2 -1.9 -7.7 170814 1972 -7.7 -8.0 -5.8 8.9 15.7 18.2 15.7 12.8 4.4 -1.5 -8.9 170814 1973 -6.6 -6.6 -0.7 8.3 16.7 19.7 19.3 12.1 7.1 -0.8 -4.4 170814 1974 -7.4 -9.5 -5.4 1.3 5.9 15.6 17.6 17.3 11.6 3.4 0.1 -5.9 170814 1975 -7.1 -6.8 -5.2 -0.3 11.0 15.5 19.8 17.2 11.6 7.1 1.9 -7.6 170814 1976 -7.7 -7.4 -4.1 3.5 9.1 16.7 17.0 16.7 11.8 4.4 -2.5 -9.9 170814 1977 -10.2 -8.8 -1.1 1.2 9.4 13.8 17.7 16.6 11.0 5.9 1.3 -7.1 170814 1978 -10.6 -8.6 -6.1 0.9 11.0 15.1 17.7 17.1 9.6 4.9 -1.6 -7.6 170814 1979 -7.0 -9.2 -1.4 3.1 10.9 15.5 19.0 16.0 12.0 7.0 2.4 -5.2 170814 1980 -9.3 -9.6 -3.9 3.6 9.3 14.3 17.6 18.0 11.3 4.6 -1.9 -8.1 170814 1981 -9.5 -3.4 -2.9 3.4 10.4 15.3 18.2 12.2 5.1 0.4 -6.0 170814 1982 -9.7 -8.9 -4.0 0.8 10.4 13.6 17.6 14.8 12.3 6.8 1.8 -4.0 170814 1983 -7.7 -6.6 -2.5 3.4 8.2 15.7 18.4 17.9 14.0 6.3 0.3 -7.0 170814 1984 -8.2 -3.6 -5.8 3.1 8.3 14.8 18.3 19.0 11.2 7.1 0.3 -5.2 170814 1985 -11.2 -6.5 -4.6 1.5 8.7 13.7 18.6 16.2 13.3 7.1 -0.6 -8.4 170814 1986 -7.5 -8.8 -3.7 10.9 13.3 17.0 16.8 11.0 6.0 -2.2 -6.8 170814 1987 -8.4 -9.4 -0.7 5.7 10.0 15.9 18.7 15.8 12.2 6.3 -1.4 -5.5 170814 1988 -7.6 -7.5 -5.2 3.1 11.1 14.4 19.2 18.1 11.8 4.4 0.8 -8.4 170814 1989 -7.7 -8.1 -4.9 1.4 11.7 15.6 17.7 16.8 13.0 6.6 -1.3 -11.9 170814 1990 -6.5 -7.4 -3.8 2.5 8.9 15.8 18.2 18.3 12.5 7.3 0.3 -5.2 170814 1991 -9.0 -6.2 -3.9 3.4 10.7 15.8 17.6 17.8 11.3 7.0 -7.7 170814 1992 -8.4 -8.3 -6.0 1.2 9.8 15.1 15.5 16.7 13.0 4.7 -1.0 -5.8 170814 1993 -8.3 -9.1 -4.4 2.8 9.8 14.8 17.9 18.6 12.5 3.6 -0.6 -5.5