Resolved questions
What's the meaning of "hovering" here?

I was supposed to be happy, but I cannot recall feeling much of anything except a dull, throbbing numbness. I was very tired and the blur of the silver trees on the side of the road became a comfort that described both newness and continuity at once. I wanted to get out and run my hands along the bark. I was sure that it was smooth and although it was still raining in the odd hovering way that it had been, I wanted to go out in it. To let it fall on my dark neck and hands, to feel it.
What's the meaning of "hovering" here? Does it meanunsteady, occasionally or irregularly?
Thanks!