Hi! They are not especially for this area, but I usually use meteocentrale.ch and kachelmannwetter.com... They give detailed forecasts only for two or three days but everything else is not reliable anyway, they say. Combining them I made very good experiences. In the last six weeks they've only been completely wrong once. :-)
When we stayed at Maison Bleau years ago, our host Neil Hart recommended https://www.yr.no/. He lived there year round and thought it was the most accurate. It has worked well for us when we visit!
I use Yr.no but I do Not trust any weather websites anymore! Hahahaha
No Climbing Today!
^
Rain sucks, but broken holds suck even more. Remember, never climb on wet rock in Fontainebleau.
The sandstone becomes brittle, and pulling on it will ruin classic problems. Drying it doesn't help, because it's still wet and weak inside.
All you can do is wait for better conditions.