Current METAR reports from around the world are available from NWS. Just enter the four-character ICAO Location Indicators at the website or you can locate hourly files containing METAR reports through this ftp site.
A decoded record looks like this:
Knoxville, McGhee Tyson Airport, TN, United States (KTYS) 35-49-05N 083-59-09W 302M Jul 18, 2007 - 09:53 AM EDT / 2007.07.18 1353 UTC Wind: from the SSW (210 degrees) at 8 MPH (7 KT):0 Visibility: 8 mile(s):0 Sky conditions: mostly cloudy Precipitation last hour: A trace Temperature: 73.0 F (22.8 C) Dew Point: 70.0 F (21.1 C) Relative Humidity: 90% Pressure (altimeter): 30.12 in. Hg (1019 hPa) ob: KTYS 181353Z 21007KT 8SM FEW006 SCT021 BKN027 23/21 A3012 RMK AO2 RAE02 SLP189 P0000 T02280211 cycle: 14