This has been bugging me for a while. I’ve noticed that at certain times of the day some days, it seems like my throat feels very dry and uncomfortable, but even if I drink water, the feeling is back as soon as I finish drinking. Usually I get the feeling in the late afternoon or early morning/late night. THe rest of the day it’s fine, and it only seems to happen on certain days.
It could be hay fever - pollen tends to be worse late in the day, or for some plants, early mornings. The only some days would fit with that - it’s very weather (& season) dependant. The severity of symptoms varies with the person, so it’s just guess on my part.
But you really should get it checked out with a doctor if it has been going on for a while - it could be something else weird, or you could get a prescription to deal with it if it is hayfever.