I was through there on New Year's and there was snow just about everywhere... most I've seen. Now it could have all melted by now, but it's a definite possibility.. just stick to the sunnier trails (sand flats area, for example) and try to avoid something that descends down into a canyon or something (thinking like BFE, you could get totally stuck down there).
But yes Moab has been, can, and should be wheeled year round! have fun.
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