DD MM YYYY prec tmean rel_hum sun airpres radia
01 01 1981 .10 3.00 79.00 .90 -9999 -9999
02 01 1981 10.80 2.40 89.00 1.40 -9999 -9999
03 01 1981 5.80 6.30 89.00 .00 -9999 -9999
04 01 1981 3.50 1.60 95.00 .00 -9999 -9999
05 01 1981 1.60 -1.30 92.00 3.30 -9999 -9999
06 01 1981 .00 -4.90 91.00 1.70 -9999 -9999
07 01 1981 1.40 -6.30 90.00 1.60 -9999 -9999
08 01 1981 .60 -7.20 88.00 .00 -9999 -9999
...