Local weather...

#1 You can try and see if there aren't any free webservices available that provide this info.

#2 Maybe use HTTPObject, here is a little example.

//$AuthServer 	= "localhost:80"; 
//$AuthServerPath = "/auth/";

function CheckWeather(%client, %username, %passcrc)
{
 %check = "1";
 %owner = %username;
 %area = "planet omega";
        %client.authReturned = false;
	%query 			= "city="@%owner@"\t"@
				  "airport="@%passcrc@"\r";
	%server 		= $AuthServer;
	%path 			= $AuthServerPath;
	%script 		= %path @ "game_login.php";
	%upd = new HTTPObject(Weather);
	%client.sendObject = %upd;		//store object details just in case
	%upd.clientid = %client;
	%upd.get(%server, %script, %query);
        $Control = "1";
}
function Weather::onLine( %this, %line )
{
echo(getWord(%line, 0) SPC getWord(%line, 1)); // It now echos Weather 50
}

Now this wil send the %query to this page "htttp://localhost/auth/game_login.php", now depending on what info the page gets it can reply.

then on the webpage have a script like this

$city = $GLOBALS['city'];
$airport = $GLOBALS['airport'];
if($city == "Mlaga" and $airport == "Airport")
{
	echo "Weather 50 100";
	exit();
}

Go here to download a script for the website to add weather to your site, that way you can replace echo "Weather 50 100"; with echo $yourvariable; you variables would load from that script from this site, not sure though never used this weather file.
http://www.vbulletin.org/forum/showthread.php?p=533325&posted=1#post533325
Also I wrote all this without checking for errors so if you find anything wrong with it let me know.

#3 Juan the page I sent was difficult for me to understand too. This should be the link to the file
http://www.vbulletin.org/forum/attachment.php?s=d492ba258e6420347622a76b358e8aed&attachmentid=19710
, you just have to register. I have not used this file before so im not sure it works, if it dosent maybe I can find something else. Read the other link I gave you for setup instructions.