temp_ranges2 = {
var temp_ranges2 = {}
var temps = Object.keys(cc_data.mnthly_avgs)
temps.forEach(function(k){
var max_per_year = cc_data.years.map((y) => d3.max(cc_data[y][k]))
var min_per_year = cc_data.years.map((y) => d3.min(cc_data[y][k]))
temp_ranges2[k] = [d3.min(min_per_year), d3.max(max_per_year)]
})
return temp_ranges2
}