It is ASCII file with 15 columns.
From column C1 to C17:
C1:	id of weather station (stn_id)
C2: year
C3: month
C4: day
C5: daily averaged temperature (0.1C) (tm)
C6: daily maximum temperature (0.1C) (tmax)
C7: daily minimum temperature (0.1C) (tmin)
C8: averaged relative humidity (%) (um)
C9: daily minimum relative humidify (%) (umin)
C10: total cloud amount (0.01) (n_sum)
C11: low cloud amount (0.01) (n_lowm)
C12: averaged wind speed (0.1m/s) (fsm)
C13: direction of maximum wind speed (fmaxx)
C14: maximum wind speed (fmaxs)
C15: precipitation (0.1mm) (rsum)
C16: ground surface temperature (0.1C) (d0m)
C17: sunshine during time (h) (sun)


The file is like this:
    sta_id      year     month       day        tm      tmax      tmin        um      umin    n_summ    n_lowm       fsm     fmaxx     fmaxs      rsum       d0m       sun
     52645      1959         2         1      -175       -79      -291        29       300        20        15        32     32744     32744         0     32766        85
     52645      1959         2         2      -146       -78      -188        25       300        58        20        48     32744     32744         0     32766        56
		......