Road conditions? Likely to be brrrrrrrrr! For weather forecasts though, check out méteo.fr if you can read French, otherwise, try CNN international or a U.K. weather site.
I read an article about a company called "Mike's Bike Tours" (group of young biking slackers from TX who started this co. in Europe) they're on the web, they give tours in lots of European cities...
I know you're probably not looking to buy into a tour, but MBT might be able to point you in the right direction, refer you to another website or association, hook you up with some like minds.
Roads are generally open weather permitting. But the Pyrenees are pretty high altitude. Beautiful though, really beautiful, aim for places like St. Jean Pied-de-Port... ALso, maybe Sylvain could give you some ideas... he's a French member of the forum, seems like a very nice, friendly guy. Look him up in the member's guide, send him a PM.
Bonne chance, and above all, bon courage!
Sara