Humidity can affect the uptake of a clutch in a manual transmission. Usually, this shows up as being a little more "grabby" (not as smooth) on humid mornings. However, in my experience, this is only a characteristic of a cold clutch, and the "grabbiness" goes away quickly as the clutch warms up.
Hatch Nation #90
'12 SE Sport 5Dr |╠╬╝|Sterling Grey Metallic|203a|Moonroof|17" Paint/Mach Whls|K&N 57S-4000|FFE RMM|Steeda STB, RSB|JBR bushings
'01 ZX3|╠╬╝|Pitch Black|Prem. pkg.|Moonroof|SVT Snorkel|SVT Springs|S2 Dampers|Steeda STS|Magnaflow exh.