For the dewpoint, wetbulb, and barometric scripts it looks like you set 2005 as your first year of climatedata files in the wxreport-settings.php file, but you have none until 2006.
It also appears that you do not have the $SITE[‘uomBaro’] = ’ inHg’; set in your settings.php file. This causes the script to assume your pressure is in mb instead of inches and displays the wrong scale.