In reply to stp:
> Should be able to climb/train with just 3 fingers on that hand. Climbing on pockets, the pinkies don't get used anyway. And climbing open handed for people with short pinkies the same happens naturally as the pinkies can't reach the hold.
On the other hand, if you pull with the other fingers, the pinkie tends to curl in as well. Which might or might not be a problem -- worth checking with your doctor?
I definitely agree with training/climbing around the injury as much as possible, though. Even if you can't use that hand at all, you can go for training your Dawes-ian one-handed climbing skills.
And this could be the time for intensive work on flexibility, core strength, leg strength (pistols for those hideous rockover-and-stand-up moves?), any prehab/rehab exercises you've been neglecting, etc. etc..
Also: yes, you will lose some strength in six weeks, at least in that one hand if you can't use it. But it's going to come back much much faster than you think, in less time than it took to build it the first time round. Your previous training isn't "down the drain".