<form method="post" action="script.php">
       Please enter your information:
       <br>
       City: <input type="text" name="name"/>
       Month: <input type="text" name="month"/>
       Year: <input type="text" name="year"/>
       <br>
       <br>
       Please choose the kinds of weather you experienced from the list below.
       <br> Choose all that apply.
       <br> <br>
       <input type="checkbox" name="weather[]" value="sunshine" />Sunshine<br />
       <input type="checkbox" name="weather[]" value="clouds" />Clouds<br />
       <input type="checkbox" name="weather[]" value="rain" />Rain<br />
       <input type="checkbox" name="weather[]" value="hail" />Hail<br />
       <input type="checkbox" name="weather[]" value="sleet" />Sleet<br />
       <input type="checkbox" name="weather[]" value="snow" />Snow<br />
       <input type="checkbox" name="weather[]" value="wind" />Wind<br />
       <input type="checkbox" name="weather[]" value="cold" />Cold<br />
       <input type="checkbox" name="weather[]" value="heat" />Heat<br />
       <input type="submit" name="submit" value="Go">
       </form>

____________________________________________________________________new file

<?php
          if (isset($_POST['submit'])) {
           $inputLocal = array($_POST['name'], $_POST['month'], $_POST['year']);

          $weatherr = array($_POST['weather']); }

           echo "In $inputLocal[0] in the month of $inputLocal[1] $inputLocal[2] you observed the following weather.";

       echo "<ul>";
       //$cnt = count($weatherr);
       // for ($i=0;$i<$cnt;$i++)
       //{echo "<li>".$weatherr[$i]."</li>";}
foreach($weatherr as $weather){
    foreach($weather as $key => $val){
        echo "$key: $val";
    }
}
           echo "</ul>";