How to seperate dataframe as follows:

```
   yr   mon  day      Tmax  Tmin   pcp
  2013   4  22        5.09-10.92   0.0                         
  2013   4  23        2.77 -9.63   0.5                         
  2013   4  24        0.28 -9.90   9.9                         
  2013   4  25        0.76 -6.70  12.2                         
  2013   4  26       -0.35 -9.48   0.0                         
  2013   4  27        7.22-10.47   0.0                         
  2013   4  28        4.19-10.78   0.0  

```

you see: there are no whitespaces between Tmax and Tmin in principle. The max width of Tmax and Tmin are 6 char-spaces. If less than 6 spaces , filled by whitespace. I want to read it to `df` and seperate each columns.  

seperate columns as given char length?