"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
270100	1970	    	    	    	    	    	    	    	    	    	    	    	    
270100	1971	    	    	    	    	    	    	    	    	    	    	    	    
270100	1972	    	    	    	    	    	    	    	    	    	    	    	    
270100	1973	    	    	    	    	    	    	    	    	    	    	    	    
270100	1974	    	    	    	    	    	    	    	    	    	    	    	    
270100	1975	    	    	    	    	    	    	    	    	    	    	    	    
270100	1976	    	    	    	    	    	    	    	    	    	    	    	    
270100	1977	    	    	    	    	    	    	 19.6	    	    	  7.8	  3.2	 -6.0
270100	1978	    	    	    	    	    	    	    	    	    	    	    	    
270100	1979	    	    	    	    	 11.9	    	    	    	    	    	    	    
270100	1980	    	    	 -1.1	    	 11.6	 15.4	 20.0	 19.5	    	    	    	    
270100	1981	    	    	    	    	    	    	    	    	    	    	    	    
270100	1982	    	    	    	    	    	    	    	    	    	    	    	    
270100	1983	    	    	    	    	    	    	    	    	    	    	    	    
270100	1984	    	    	    	    	    	    	    	    	    	    	    	    
270100	1985	    	    	    	    	    	    	    	    	    	    	    	    
270100	1986	    	    	    	    	    	    	    	    	    	    	    	    
270100	1987	    	    	    	    	    	    	    	    	    	    	    	    
270100	1988	    	    	    	    	    	    	    	    	    	    	    	    
270100	1989	    	    	    	    	    	    	    	    	    	    	    	    
270100	1990	    	    	    	    	    	    	    	    	    	    	    	    
270100	1991	    	    	    	    	    	    	    	    	    	    	    	    
270100	1992	    	    	    	    	    	    	    	    	    	    	    	    
270100	1993