I think you will need a before render snippet that translates the values provided by the aggregate model into actual month names. 

You could build off this one:  https://community.skuid.com/t/funnel-visualization-colors  except that you’d be replacing the chart lable instead of reordering… 

Finally found the answer: var chartObj = arguments[0], $ = skuid.$; $.extend(true, chartObj.xAxis[0],{ labels: { formatter: function(){ if(this.value == 1) return “January”; else if(this.value == 2) return “February”; else if(this.value == 3) return “March”; else if(this.value == 4) return “April”; else if(this.value == 5) return “May”; else if(this.value == 6) return “June”; else if(this.value == 7) return “July”; else if(this.value == return “August”; else if(this.value == 9) return “September”; else if(this.value == 10) return “October”; else if(this.value == 11) return “November”; else if(this.value == 12) return “December”; else return this.value; } } });