Replicate thermocouples (n = 2-4) and TDR probes (n = 1-2) per vegetation type and experimental treatment have been recording soil temperatures at 2, 5, and 10 cm and moistures (0-10 cm) several times per day since 2006 in Tall birch, Birch Hummock, Dry Heath, and Wet Sedge vegetation communities. The data are quality checked and presented as diel (daily) means. In addition, we have been monitoring the effects of snow fences and summer plastic greenhouses on soil temperature and moisture. These data are also part of the Adaptations to Permafrost in Transition (ADAPT) project.