"station_id" "year" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec" 193821 1970 -5.5 -1.0 1.5 7.5 13.6 21.1 21.3 17.0 11.9 8.6 -0.1 193821 1971 -3.4 0.1 2.8 6.8 12.2 18.4 22.1 21.9 19.4 13.9 5.3 2.7 193821 1972 -1.4 2.2 5.2 12.8 17.0 20.7 20.2 17.7 10.1 5.8 3.2 193821 1973 -0.3 -1.0 5.3 8.7 12.3 22.3 17.8 3.5 193821 1974 -1.4 3.4 8.9 12.0 17.1 21.0 21.8 17.4 9.2 6.8 2.2 193821 1975 1.9 -0.2 1.9 5.1 13.9 -1.4 193821 1976 -2.5 1.6 4.0 10.1 13.0 19.3 21.3 21.2 16.7 10.4 4.1 -1.7 193821 1977 -5.8 -2.0 5.0 8.2 13.9 17.1 21.6 21.6 17.1 11.6 8.0 0.4 193821 1978 -1.5 -3.7 1.2 6.8 13.0 18.2 20.7 21.9 15.8 11.0 6.7 1.8 193821 1979 -0.5 -5.4 4.1 7.3 14.9 17.5 22.3 20.6 17.3 11.6 8.9 3.0 193821 1980 -0.8 -3.0 1.9 8.5 13.1 4.9 -1.2 193821 1981 -5.9 1.0 2.4 9.1 12.7 19.3 21.8 21.0 16.1 10.0 6.3 0.6 193821 1982 -5.4 -0.3 2.6 6.4 12.7 16.1 22.1 19.6 17.3 11.3 8.4 4.4 193821 1983 -0.2 -0.4 4.4 7.4 12.2 18.8 22.4 21.1 19.3 12.6 7.8 0.9 193821 1984 -1.6 2.5 0.3 6.7 13.2 18.6 21.0 21.9 16.3 12.3 6.9 4.4 193821 1985 -4.3 -0.7 3.6 7.9 13.0 17.1 21.5 20.8 17.5 12.8 8.9 -0.3 193821 1986 0.1 -1.0 4.0 8.6 13.2 18.0 20.7 19.9 15.5 11.6 5.6 2.5 193821 1987 -1.1 -2.9 2.5 7.8 12.7 18.5 20.7 20.2 17.0 10.2 6.1 1.9 193821 1988 -3.1 -0.6 2.5 6.8 12.1 17.6 21.6 22.7 16.6 9.4 7.2 -0.2 193821 1989 0.4 -1.5 1.4 6.1 13.3 18.5 20.5 21.0 17.3 11.8 6.7 -5.7 193821 1990 2.2 0.4 3.5 7.1 11.5 17.7 21.4 22.4 16.9 14.2 7.8 4.2 193821 1991 -0.5 1.6 4.2 8.5 14.8 19.1 21.6 22.0 17.3 12.7 6.9 2.4 193821 1992 -1.5 -1.1 0.9 5.4 12.0 17.8 19.9 20.0 17.0 10.3 6.2 1.8 193821 1993 0.2 -3.3 1.1 7.6 13.5 18.6 21.9 21.0 17.6 10.4 6.8 1.5