Define new axis characteristics. AXIS1 suppresses the axis label and specifies month abbreviations for the major tick mark labels. AXIS2 specifies a two-line axis label and scales the axis to show major tick marks at every 10 degrees from 0 to 100 degrees. 
axis1 label=none
      value=('JAN' 'FEB' 'MAR' 'APR' 'MAY' 'JUN'
             'JUL' 'AUG' 'SEP' 'OCT' 'NOV' 'DEC')
      offset=(2)
      width=3;
axis2 label=('Degrees' justify=right 'Fahrenheit')
      order=(0 to 100 by 10)
      width=3;