I agree for the most part, but in August this can change…as this is Philmont "monsoon" season. For the most part it only rains for 1-2 hours each day, but occasionally it will rain continuously for 8 hours at a time ('05 was ridiculous). The nice thing is that with the low humidity everything dries quickly, but the rain is also really cold, so hypothermia is never out of the question.
Take home for you though: I would hedge my bets though and just go with dri ducks.