To do this open up the weather.class.php file look for and remove the below code:
for($pos = 0; ($pos = strpos($data, 'yweather:forecast', $pos)) !== false; $pos+=2) {
$attr = explode('"', substr($data, $pos, strpos($data, '/>', $pos)-$pos));
if($metric) {
$attr[5] = number_format(($attr[5] - 32) / 1.8, 0);
$attr[7] = number_format(($attr[7] - 32) / 1.8, 0);
}
$day = array();
$day['when'] = $attr[1];
$day['low'] = $attr[5].'°'.$units[0];
$day['high'] = $attr[7].'°'.$units[0];
$day['text'] = $attr[9];
$day['image'] = $attr[11];
$ret[] = $day;
}