"station_id" "year" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec" 175304 1970 -11.2 -7.4 -2.4 4.1 11.0 16.9 21.0 19.7 13.4 8.9 2.2 -8.4 175304 1971 -8.7 -7.1 -2.9 3.8 11.7 16.8 20.4 19.0 14.8 9.3 -0.3 -7.5 175304 1972 -7.7 -8.0 -5.3 1.8 12.1 16.4 19.5 17.5 14.0 5.1 -0.7 -9.0 175304 1973 -7.0 -7.0 -0.2 4.5 9.4 17.8 21.2 20.6 12.9 7.6 0.5 -1.6 175304 1974 -7.6 -9.1 -5.0 3.1 7.8 16.4 18.6 18.3 12.2 4.5 0.4 -5.3 175304 1975 -7.1 -6.6 -3.8 2.1 13.1 16.9 21.2 19.0 13.1 8.0 2.6 -7.4 175304 1976 -8.0 -6.8 -3.4 5.0 11.3 18.8 18.8 18.3 13.6 5.9 -0.7 -9.3 175304 1977 -10.2 -8.1 1.0 3.7 12.1 15.5 19.7 18.3 12.1 7.8 2.5 -5.6 175304 1978 -9.6 -8.5 -4.0 3.3 12.9 17.0 19.8 19.0 11.6 6.0 -0.4 -6.9 175304 1979 -6.1 -8.9 0.5 4.7 12.1 16.6 20.7 17.6 13.6 7.8 3.6 -4.3 175304 1980 -8.4 -8.9 -3.1 5.5 11.6 15.2 18.9 19.7 11.7 5.7 0.5 -7.9 175304 1981 -9.3 -3.5 -0.4 5.4 12.8 17.0 20.0 18.7 13.3 6.0 1.6 -3.7 175304 1982 -10.3 -8.1 -2.8 3.4 12.1 15.6 20.1 16.7 14.1 2.7 -3.4 175304 1983 -7.0 -6.2 -0.4 5.6 10.3 17.5 19.6 15.5 7.6 1.7 -6.3 175304 1984 -8.4 -3.3 -4.8 4.8 16.7 20.9 20.8 8.3 2.1 -4.4 175304 1985 -10.9 -5.3 -2.6 4.2 11.7 15.9 21.2 18.6 15.1 8.3 0.4 -7.4 175304 1986 -7.1 -8.0 -2.7 6.8 11.8 15.3 18.3 17.2 11.7 7.0 -0.8 -6.3 175304 1987 -8.1 -8.1 -0.8 7.0 11.3 17.5 19.6 17.9 13.5 7.6 -0.2 -4.7 175304 1988 -7.4 -6.7 -3.5 4.6 12.5 16.7 20.8 19.7 13.2 5.5 2.7 -7.2 175304 1989 -7.7 -8.1 -4.7 3.2 13.7 16.8 19.4 18.2 13.7 7.4 -0.2 -12.0 175304 1990 -5.7 -7.8 -2.4 4.7 10.1 17.5 20.3 20.4 13.6 8.3 1.6 -4.3 175304 1991 -9.0 -6.5 -1.8 4.9 12.6 17.7 19.9 19.7 13.0 8.1 1.9 -7.0 175304 1992 -8.5 -8.3 -4.7 3.1 11.7 16.8 17.2 18.6 14.3 5.7 -0.1 -5.2 175304 1993 -8.1 -9.7 -3.5 4.7 11.5 16.6 19.6 19.9 13.9 4.8 0.4 -4.2