Techman
I'm no expert but in my opinion with only a couple of months to train, you would benifit more from riding than weight training. I have taken up weight training in the "off" season primarily to strenghten my core, but I do leg and upper body strenghtening some also. At least for me, I have found doing "hill repeats" improved my hill climbing the fastest.
I would also recommend looking at gearing set-up. If you need assistance, go to a good LBS.