"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
196681	1970	    	    	  2.1	  7.7	 13.4	 18.0	 21.9	 21.3	 17.3	 11.9	  7.6	  1.3
196681	1971	 -3.5	 -0.6	  2.5	  6.4	 12.2	 18.0	 21.6	 21.7	 18.4	 13.8	  5.8	  2.6
196681	1972	  1.0	 -1.6	  1.8	  4.8	 12.3	 17.6	 20.6	 20.2	 17.4	 10.2	  5.5	  4.9
196681	1973	  1.7	 -0.2	  5.4	  8.7	 12.5	 19.5	 21.9	 22.2	    	 11.8	  6.6	  4.2
196681	1974	  0.7	 -1.3	  2.8	  8.2	 11.7	 17.6	 21.4	 21.7	 17.7	 10.1	  6.2	  2.9
196681	1975	  1.9	  0.2	  2.2	  5.8	 14.3	 18.2	 22.6	 21.4	 16.4	 13.1	  8.7	  2.0
196681	1976	 -2.2	  1.3	  3.2	  9.9	 14.0	 19.3	 21.2	 21.0	 16.6	 10.9	  4.8	 -1.2
196681	1977	 -4.5	 -1.2	  5.0	  8.5	 13.9	 17.6	 21.8	 21.4	 17.1	 11.9	  8.2	  1.3
196681	1978	 -1.1	 -3.0	  1.3	  6.6	 13.4	 18.1	 20.6	 21.2	 15.6	 11.6	  6.4	  1.7
196681	1979	 -0.9	 -6.2	    	  7.4	 16.0	 18.6	 22.3	 21.6	    	    	    	    
196681	1980	    	    	    	    	    	 18.0	 22.7	 22.5	 20.0	 11.9	  6.5	 -0.3
196681	1981	 -4.0	    	    	    	 14.7	 19.4	 22.2	    	 17.0	 11.5	  7.7	  2.6
196681	1982	 -3.1	  0.5	  3.2	  6.8	 12.8	 15.7	 21.6	 19.8	 17.3	 12.6	  9.7	  5.4
196681	1983	  1.4	  1.7	  4.5	  8.3	 12.7	 19.1	 23.2	    	 20.0	 13.7	  9.1	  2.6
196681	1984	  0.1	  3.7	  1.6	  7.3	 14.1	 19.2	 22.0	 22.7	 17.6	    	    	  5.3
196681	1985	 -2.5	  1.0	    	    	    	    	 22.9	 22.5	 19.1	    	    	    
196681	1986	    	 -0.3	  2.7	    	    	 17.1	    	 20.2	 16.3	 13.2	  6.8	  3.6
196681	1987	 -1.7	 -3.3	  1.8	  8.1	 13.0	 17.4	 21.8	 19.7	 17.9	 11.1	  6.8	  0.8
196681	1988	 -2.4	    	    	    	    	 17.8	    	    	    	    	    	    
196681	1989	    	    	    	    	 13.1	 18.1	 20.4	 21.0	 19.1	 12.7	  7.0	    
196681	1990	  2.2	  0.5	  3.0	  6.9	 10.7	 16.0	 20.0	 21.6	 15.5	 12.6	  7.5	    
196681	1991	    	    	    	    	    	    	    	    	    	    	    	    
196681	1992	    	    	    	    	    	    	    	 23.2	 21.8	    	    	    
196681	1993