Despite the lack of rain, humidity right now in the Bay Area is still not horribly low by national standards. Looking at the local forecast I am seeing humidity in the range of roughly 40% - 60%.
Taking into account the effects of indoor heating and an outside temperature well above freezing, this is still pretty pleasant compared to what happens in cold climates indoors when you heat frigid outdoor air up to room temp. Cold air does not hold as much moisture, and when your furnace heats it up, the amount of moisture content stays the same but the carrying capacity for moisture increases, effectively making it very dry.
The upshot here is that even if it is a bit dry in the Bay Area right now, it's still nothing compared to the bone dry indoor air you would get somewhere where the winters are actually cold.
Despite the lack of rain, humidity right now in the Bay Area is still not horribly low by national standards. Looking at the local forecast I am seeing humidity in the range of roughly 40% - 60%.
Taking into account the effects of indoor heating and an outside temperature well above freezing, this is still pretty pleasant compared to what happens in cold climates indoors when you heat frigid outdoor air up to room temp. Cold air does not hold as much moisture, and when your furnace heats it up, the amount of moisture content stays the same but the carrying capacity for moisture increases, effectively making it very dry.
The upshot here is that even if it is a bit dry in the Bay Area right now, it's still nothing compared to the bone dry indoor air you would get somewhere where the winters are actually cold.