actually no.

If there's humidity then the warmer the temperature the more water the filament will absorb. On account of the filament expanding with the heat and opening up the pores that absorb the water.
Dry and cool would be best. But a sealed plastic bag in any environemnt works best :-)
3dfilaprint send you the storage bags with the filament. Which is good of them :-)

That said winter's coming up and in england that pretty much means damp until june.
I've had zero issues with humidity and abs and pla.
Don't think it's as big an issue as people say - plus the filament industry has moved amazingly fast in the last 12 months and even the cheap ebay filament is pretty much decent quality now.