To endorse Noctivarga's comments, I once landed in an airfield in northern Germany having ben told by the tower that the braking action was good.
After an interesting braking section of the landing, I went to the tower to find out the source of their 'braking action good' in their airfield weather readout prior to landing. They said that the last pilot to land reported 'braking action good'.
I looked on the ramp at the only other aircraft there (apart from the one I was operating), it was a F27 with all its covers fitted. I said 'is that the last aircraft to land?' ATC said 'yes'. I said when did it land and was all this snow about then?' ATC said 'It landed about half an hour ago and we've had a heavy snow storm since then!'
I LEARNT ABOUT FLYING FROM THAT!
Have a shot at an approach by all means but: IF IN DOUBT. DIVERT.
Do not trust reports unless you are absolutely sure they are accurate.