"station_id"	"year"	"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"	"Jul"	"Aug"	"Sep"	"Oct"	"Nov"	"Dec"
192501	1970	 -5.0	 -1.1	  2.1	  7.8	 13.1	 17.3	 21.1	 21.2	 17.6	 13.2	  7.9	  0.6
192501	1971	 -3.5	 -1.0	  2.7	  6.2	 12.1	 17.6	 21.3	 21.2	 19.4	 15.1	  6.2	  3.0
192501	1972	  0.5	 -1.7	  2.5	  5.1	 12.4	 17.0	 20.5	 20.5	 17.9	 10.5	  5.8	  3.6
192501	1973	  0.1	 -1.0	  5.2	  8.5	 12.3	 19.1	 21.4	 22.2	 17.6	 12.9	  6.6	  3.7
192501	1974	  0.6	 -0.9	  3.3	  8.0	 12.0	 17.1	 21.4	 22.0	 18.3	 10.6	  7.7	  2.5
192501	1975	  1.8	    	  2.2	  5.6	 14.0	 18.0	 22.0	 22.0	 16.9	 13.9	  9.2	  2.2
192501	1976	 -2.4	  1.7	  4.2	  9.8	 13.4	 18.9	 21.5	 21.1	 17.0	 11.0	  4.7	 -1.3
192501	1977	 -5.6	 -1.9	  4.7	  8.4	 13.6	 17.7	 21.6	 21.3	 17.4	 12.0	  8.2	  0.9
192501	1978	 -1.8	 -3.8	  1.1	  7.0	 12.7	 17.9	 20.0	 21.7	 16.3	 11.2	  7.4	  2.0
192501	1979	 -0.1	 -5.6	  4.0	  7.8	 14.9	 17.5	 22.3	 21.2	 18.0	 12.0	  8.7	  3.0
192501	1980	 -0.7	 -2.7	  1.8	  8.5	 13.4	 17.2	 22.0	 22.6	 18.8	 11.1	  5.5	 -1.1
192501	1981	 -6.3	  0.6	  2.2	  8.8	 13.0	 19.2	 22.2	 20.7	 17.8	    	  6.5	  0.9
192501	1982	 -4.4	 -1.1	  2.7	  6.1	 12.5	 15.3	 20.5	 18.8	 16.6	 11.8	  8.9	  4.9
192501	1983	 -0.1	    	  4.5	  7.9	 12.5	 18.3	 21.5	 20.5	 18.3	 12.1	  8.0	  1.4
192501	1984	 -1.4	  2.8	  0.6	  7.4	 13.5	 19.1	 21.3	 21.5	 16.0	 12.7	  8.1	  5.1
192501	1985	 -3.1	  0.1	  4.2	  8.4	 13.8	 17.2	 21.2	 20.6	 17.3	 12.4	  9.2	  0.4
192501	1986	  0.2	 -1.2	  3.4	  8.5	 13.5	 17.9	 20.0	 19.6	 15.9	 11.9	  6.1	  3.0
192501	1987	 -0.6	 -2.3	  3.1	  8.2	 12.8	 18.9	 20.7	 20.3	 17.1	 11.0	    	  2.2
192501	1988	 -2.2	  0.5	  3.2	  7.6	 12.4	 17.8	 21.9	 22.5	 16.4	 10.1	  7.8	  1.3
192501	1989	  0.9	 -0.6	  2.5	  6.8	 13.6	 18.7	 20.2	 21.0	 18.1	 11.9	  6.9	 -4.8
192501	1990	  2.9	  1.3	  3.8	  7.6	 12.0	 17.5	 20.8	 22.0	 17.0	 14.7	  8.6	  4.5
192501	1991	  0.1	  2.2	  4.8	  9.3	 15.1	 19.1	 21.4	 21.7	 17.2	 12.6	  7.2	  2.9
192501	1992	 -0.8	 -0.2	  1.5	  5.9	 11.7	 17.4	 19.7	 20.4	 17.8	 11.2	  6.9	  2.4
192501	1993	  0.9	 -1.8	  2.2	  8.0	 14.0	 18.4	 21.6	 21.4	 18.1	 11.7	  7.7	  2.1