metaf2xml can download, parse and decode aviation routine weather
reports (METAR, SPECI, SAO), aerodrome forecasts (TAF), synoptic
observations (SYNOP) and observations from buoys (BUOY). The
extracted data can be written as XML or passed to a user-defined
function (all done in Perl).

It also provides XSLT style sheets to convert the XML to plain
language (text, HTML), or XML with different schemas. A web-based
(CGI) user interface can be used to download and display up-to-date
weather data from NOAA, Ogimet, and other sources.

WWW: http://metaf2xml.sourceforge.net