Errors with file_get_contents()

Hi,

I get the following list of errors on occasion on my site with the weather.module:

file_get_contents() [<a href='function.file-get-contents'>function.file-get-contents</a>]: php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/...../sites/all/modules/weather/weather.module on line 2087.

file_get_contents() [<a href='function.file-get-contents'>function.file-get-contents</a>]: connect() failed: php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/.../sites/all/modules/weather/weather.module on line 2087.

file_get_contents(ftp://tgftp.nws.noaa.gov/data/observations/metar/stations/FACT.TXT) [<a href='function.file-get-contents'>function.file-get-contents</a>]: failed to open stream: operation failed in /var/.../sites/all/modules/weather/weather.module on line 2087.

Anyone got an idea what's up?

Thank,
Mikkel