Product review (2 stars): Uh . . .next . . . . .
I don't know if the humidity reading is accurate but it does fluctuate.

As for the temperature reading, it's not calibrated at all and the machine has a really
hard time letting go of the temperature it's currently on.  Others mentioned it may
only register odd numbers and that seems to be the case here; someone mentioned
it only jumps two degrees at a time, also possible here.  I'm gonna say it's not
accurate or reliable.

I got this for the humidity reading and at least it does show sensitivity for that.  If you
want it for the temperature reading I'd say move on.  And if you are like some people
and a little OCD about absolute accuracy or different machines reading the same, my
friend, these will bring you a world of hurt:)