Usually ... a dry cigar will crack or make crunching noises when gently squeezed, or when you gently bite the foot between your teeth. The wrapper itself may have cracks in it already, and will flake or unravel when you smoke it. It will taste hot and harsh ... and may burn unevenly ...
IMHO ... dry cigars are not a pleasure to smoke. to me they lose a lot of thheir flavor ... and taste like yard leaves smell when you burn them.
You must have a very tightly rolled cigar to begin with ... humidity swells the leaves, making them much harder to draw on when they are tightly rolled.
If I have a cigar that is hard to draw ... I will let it sit out for a few hours, and that usually helps it smoke more easily.