Would you expect the shocks from static electricity to be more severe in summer or winter?Because of a higher moisture content, air is a better...

The shocks are more severe in the winter. As soon as our
furnaces go on, the humidity inside goes way down. We have several hygrometers in our
house, and without use of humidifiers, the humidity in the house in winter drops to 20%
or below. 50% is comfortable. Anyway, a static electricity shock happens due to the
sudden discharge of electrons from one surface (you), to another surface that conducts
well (a metal doorknob--or maybe your cat!) As you say, higher moisture content of air
equals better conductor of charge, so the electrons are more likely to dissipate in the
air gradually when the air is humid--they don't build up to give you that
shock.