Is there a place where past METARs are logged?
Suppose I want all the METAR for a given airport from October 1st to October 15th 2015. Where can I find them?
If it matters, I'm looking in particular for METARs from French airports.
Professional information about meteorological conditions in the world is such a site that offers 30-day history for METARs/SPECIs and TAFs reports.
The coverage is said to be worldwide. Here is a glance at the query interface:
The site states these conditions of use for the reports:
About all the codified met. reports (SYNOPS, METAR ...), the copyright are from every country or source institution. To use them, read WMO resolution 40.
(essentially it says it's free for use.)