JSFiddle - React, Tailwind, and code Playground

HTML

<select class="" id="manufacturedMonth" name="manufacturedMonth">
<option value="-1">MM</option>
<option value="8">Aug</option>
<option value="7">Jul</option>
<option value="6">Jun</option>
<option value="5">May</option>
<option value="4">Apr</option>
<option value="3">Mar</option>
<option value="2">Feb</option>
<option value="1">Jan</option>
<option value="12">Dec</option>
<option value="11">Nov</option>
<option value="10">Oct</option>
<option value="9">Sep</option>
</select>

JavaScript

var d = new Date(),
    
    mnth = d.getMonth();
    
$('#manufacturedMonth option').filter(function () {
        return parseInt(this.value,10) > mnth; 
    }).hide();