Bumping an old thread -

Weather is getting humid again, causing this issue to arise. I have not yet had the manual transmission fluid replaced, but would that really cause the clutch to not engage properly on humid days? The issue is really not apparent at all in dry, cooler weather, and it's ONLY noticeable from a complete stop into first gear.

And I should add that I just passed 50,000 miles on the car, so maybe it's just time to replace the clutch?