Thanks guys, all sorted and understood now.
Another issue, I have the sunshine hours set to use the pie chart but it does not. Any suggestions?
Again viewing your 'testtags.php', the value for $changeinday is
$changeinday = '00:00'; // change in day length since yesterday
so until some real value appears there we're not going to make much headway.
Part of the problem may be the resurrected WD version, b162 or greater, you're using. I recall seeing a discussion about $changeinday on the Weather-Watch forum in the 'Version 2' thread recently. I've stuck with b81, the last pre-crash version. It's working for me and I'm not particularly eager to beta-test a new-old version because my data and logs may suffer during Brian's reconstruction of WD.
If you haven't done so already, try installing Brian's latest beta build for starters.